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aa6aaf2a11c93148121516725a7b3949ee78a97b
lanework/KanbanTests/BoardWriterTests.swift
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rzen bea6d02d1d Realign read-side rules — width range coercion, finite order, symlink pins 
The design corpus ratified that ranges are part of a sensible reading:
an exact-integer width below 1 now coerces to 1 read-side (bytes
untouched) instead of reading as malformed — the width division must
never see a zero or negative unit — while a non-finite order (.nan,
.inf) is now the same loud malformed-order rejection as a non-numeric
one, guarded at the single point where the double arrives so loader
and Writer inherit it together. The symlink-never-traversed rule
turned out to be already enforced (the loader has filtered symlinks
ahead of the directory check since the first commit); it and the
copy-preserves-the-link-verbatim behavior are now pinned by tests,
alongside the two hostile shapes the corpus names (width: 0,
order: .nan). Five new tests.

Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY
2026-07-27 14:21:03 -04:00

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import Foundation
import Testing
@testable import Kanban
// MARK: - Fixtures
// `WriterFixture` lives in `WriterTestSupport.swift` — shared with `WriteFidelityTests.swift`.
private enum Fixture {
/// Unknown keys in a deliberate order, an own-line comment above and below, an inline
/// comment, a `modified-by` stamp, and a body — everything one `title` rewrite must leave
/// exactly as it found it.
static let rich = """
---
# hand-written header
schema: 1
title: Original
order: 1024
project: lanework # agent overlay
sphere: work
labels: [a, b, c]
created: 2026-07-26T16:41:38Z
modified: 2026-07-26T19:06:55Z
modified-by: claude
# trailing note
---
Body text.
More body — with *markdown*.
"""
static let minimal = """
---
schema: 1
order: 1024
title: Thing
---
Body
"""
/// The whole frontmatter as one flow mapping: reads fine, has no line per key to rewrite.
static let flowMapping = "---\n{schema: 1, order: 1024}\n---\nbody\n"
/// YAML's explicit-key syntax — the key is a sequence, not a name the editor can match.
static let nonScalarKey = "---\n? [a, b]\n: value\nschema: 1\n---\nbody\n"
}
/// Literal UUID-shaped folder names, so the display-order tie-break is pinned rather than
/// accidental (`Ranks.isOrderedForDisplay`).
private enum Child {
static let a = "aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa"
static let b = "bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb"
static let c = "cccccccc-cccc-4ccc-8ccc-cccccccccccc"
static let deleted = "dddddddd-dddd-4ddd-8ddd-dddddddddddd"
static let indexless = "eeeeeeee-eeee-4eee-8eee-eeeeeeeeeeee"
}
// `Ident` and `Item` live in `WriterTestSupport.swift` — shared with `WriteFidelityTests.swift`.
/// The keys a move or a copy is allowed to have touched; every other line must be byte-identical.
private let rewrittenKeys = [FrontmatterKeys.order, FrontmatterKeys.modified, FrontmatterKeys.modifiedBy]
/// A folder's UUID-shaped children keyed by the `title` inside them. A copy remints every folder
/// it materializes, so the file's own content is the only way back to "which card is which".
private func childrenByTitle(of relativePath: String, in fixture: WriterFixture) throws -> [String: String] {
var byTitle: [String: String] = [:]
for child in try BoardLoader.directoryCandidates(in: fixture.url(relativePath))
where BoardLoader.isUUIDShaped(child.lastPathComponent) {
let name = child.lastPathComponent
guard fixture.exists("\(relativePath)/\(name)/index.md") else { continue }
if let title = try FrontmatterDocument.parse(fixture.indexText("\(relativePath)/\(name)")).title.value {
byTitle[title] = name
}
}
return byTitle
}
// `writeFailure` lives in `WriterTestSupport.swift` — shared with `WriteFidelityTests.swift`.
/// The file's lines minus every line that opens one of `keys` — what a rewrite of exactly those
/// keys has to leave byte-identical.
private func lines(of text: String, excludingKeys keys: [String]) -> [String] {
text.components(separatedBy: "\n")
.filter { line in !keys.contains { line.hasPrefix("\($0):") } }
}
// MARK: - Preservation
struct BoardWriterPreservationTests {
@Test func aTitleEditTouchesOnlyTheTitleAndTheStamps() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item("card", Fixture.rich)
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Renamed"))
}
let after = try fixture.indexText("card")
let stamped = [FrontmatterKeys.title, FrontmatterKeys.modified, FrontmatterKeys.modifiedBy]
#expect(lines(of: after, excludingKeys: stamped) == lines(of: Fixture.rich, excludingKeys: stamped))
#expect(after.contains("title: Renamed\n"))
let document = try FrontmatterDocument.parse(after)
#expect(document.unknownFields.map(\.key) == ["project", "sphere", "labels"])
#expect(document.keys == [
"schema", "title", "order", "project", "sphere", "labels", "created", "modified",
])
#expect(document.rawValue(for: "labels") == "[a, b, c]")
#expect(after.hasPrefix("---\n# hand-written header\nschema: 1\n"))
#expect(after.contains("project: lanework # agent overlay\n"))
#expect(after.contains("\n# trailing note\n---\n"))
}
@Test func aFrontmatterEditLeavesTheBodyByteIdentical() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item("card", Fixture.rich)
let body = Data("Body text.\n\nMore body — with *markdown*.\n".utf8)
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.order, to: .double(2048))
}
let after = try fixture.indexData("card")
#expect(after.suffix(body.count) == body)
#expect(try FrontmatterDocument.parse(fixture.indexText("card")).order == .valid(2048))
}
@Test func aSuccessfulWriteLeavesNoTempFileBehind() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item("card", Fixture.minimal)
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Renamed"))
}
#expect(try fixture.entryNames("card") == ["index.md"])
}
/// The engine's per-line ending guarantee (01-storage-format.md § Fractal layout ▸ Rules),
/// verified end to end through the writer: a CRLF file stays CRLF.
@Test func aCRLFFileKeepsCRLFOnEveryRewrittenLine() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let text = "---\r\nschema: 1\r\norder: 1024\r\ntitle: Thing\r\n"
+ "modified: 2026-01-01T00:00:00Z\r\nmodified-by: claude\r\n---\r\nbody\r\n"
let folder = try fixture.item("card", text)
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Renamed"))
}
let after = try fixture.indexText("card")
#expect(after.contains("title: Renamed\r\n"))
#expect(after.contains("modified: ") && !after.contains("2026-01-01T00:00:00Z"))
#expect(!after.contains("modified-by"))
#expect(after.hasSuffix("---\r\nbody\r\n"))
// No bare LF survives anywhere once the CRLF pairs are taken out.
#expect(!after.replacingOccurrences(of: "\r\n", with: "").contains("\n"))
}
}
// MARK: - Stamps
struct BoardWriterStampTests {
@Test func modifiedIsStampedAndModifiedByIsCleared() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item("card", Fixture.rich)
#expect(try FrontmatterDocument.parse(fixture.indexText("card")).modifiedBy == .valid("claude"))
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Renamed"))
}
let after = try fixture.indexText("card")
#expect(!after.contains("modified-by"))
let document = try FrontmatterDocument.parse(after)
#expect(document.modifiedBy == .missing)
let modified = try #require(document.modified.value)
#expect(abs(modified.timeIntervalSinceNow) < 60)
}
/// The stamps run *after* the caller's closure, so they always win — a call site cannot
/// leave a stale `modified` or a re-added `modified-by` behind.
@Test func theStampsOutrankWhatTheEditsClosureDid() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item("card", Fixture.minimal)
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.modified, to: .date(Date(timeIntervalSince1970: 0)))
document.set(FrontmatterKeys.modifiedBy, to: .string("claude"))
}
let document = try FrontmatterDocument.parse(fixture.indexText("card"))
#expect(document.modifiedBy == .missing)
let modified = try #require(document.modified.value)
#expect(abs(modified.timeIntervalSinceNow) < 60)
}
/// A file with no `modified` at all gains one — appended before the closing delimiter.
@Test func aFileWithoutAModifiedKeyGainsOne() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item("card", Fixture.minimal)
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Renamed"))
}
let document = try FrontmatterDocument.parse(fixture.indexText("card"))
#expect(document.keys == ["schema", "order", "title", "modified"])
#expect(document.modified.value != nil)
#expect(document.body == "Body\n")
}
}
// MARK: - Readable but uneditable
/// 01-storage-format.md § Frontmatter, settled: a frontmatter shape the surgical editor cannot
/// key by spans loads and renders normally, and every app write to it refuses loudly.
struct BoardWriterUneditableTests {
@Test func ordinaryDocumentsAreEditable() throws {
#expect(try FrontmatterDocument.parse(Fixture.rich).uneditableShape == nil)
#expect(try FrontmatterDocument.parse(Fixture.minimal).uneditableShape == nil)
#expect(try FrontmatterDocument.parse("---\nflow: {a: 1,\nb: 2}\nlast: x\n---\nbody\n").uneditableShape == nil)
#expect(FrontmatterDocument(body: "new").uneditableShape == nil)
}
@Test func aWholeFrontmatterFlowMappingReadsButRefusesWrites() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item("card", Fixture.flowMapping)
let document = try FrontmatterDocument.parse(Fixture.flowMapping)
#expect(document.uneditableShape == .keyWithoutOwnLine)
#expect(document.schema == .valid(1))
#expect(document.order == .valid(1024))
let error = writeFailure {
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Renamed"))
}
}
#expect(error?.reason == .uneditableFrontmatter(.keyWithoutOwnLine))
// No title in `Fixture.flowMapping`, so the pre-flight read leaves it nil.
#expect(error?.operation == .style(title: nil))
#expect(error?.path.hasSuffix("card/index.md") == true)
#expect(error?.description.contains("style") == true)
#expect(try fixture.indexText("card") == Fixture.flowMapping)
#expect(try fixture.entryNames("card") == ["index.md"])
}
@Test func aNonScalarKeyReadsButRefusesWrites() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item("card", Fixture.nonScalarKey)
#expect(try FrontmatterDocument.parse(Fixture.nonScalarKey).uneditableShape == .nonScalarKey)
#expect(try FrontmatterDocument.parse(Fixture.nonScalarKey).serialized() == Fixture.nonScalarKey)
let error = writeFailure {
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Renamed"))
}
}
#expect(error?.reason == .uneditableFrontmatter(.nonScalarKey))
#expect(try fixture.indexText("card") == Fixture.nonScalarKey)
}
/// A key whose spacing the span matcher cannot key on lands in the same refusal — the
/// detection is conservative on purpose.
@Test func aKeyWithSpaceBeforeItsColonIsUneditable() throws {
#expect(try FrontmatterDocument.parse("---\nschema : 1\n---\nbody\n").uneditableShape == .keyWithoutOwnLine)
}
}
// MARK: - Failure paths
struct BoardWriterFailureTests {
@Test func aFileThatIsNotUTF8IsALoudErrorAndIsLeftAlone() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let latin1 = try #require("---\nschema: 1\ntitle: café\n---\nbody\n".data(using: .isoLatin1))
let folder = try fixture.item("card", bytes: latin1)
let error = writeFailure {
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Renamed"))
}
}
guard case let .unreadable(message) = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(message.contains("UTF-8"))
#expect(try fixture.indexData("card") == latin1)
#expect(try fixture.entryNames("card") == ["index.md"])
}
@Test func aMissingIndexIsALoudError() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = fixture.url("card")
try FileManager.default.createDirectory(at: folder, withIntermediateDirectories: true)
let error = writeFailure {
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { _ in }
}
guard case .unreadable = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(try fixture.entryNames("card") == [])
}
@Test func unparseableFrontmatterIsALoudError() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let text = "---\nschema: 1\n bad: indent\n---\nbody\n"
let folder = try fixture.item("card", text)
let error = writeFailure {
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { _ in }
}
guard case .unreadable = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(try fixture.indexText("card") == text)
}
/// The atomicity guarantee under an I/O failure: the temp file cannot be created, so the
/// destination still holds its previous bytes and nothing is left lying around.
@Test func aFailedWriteLeavesTheFileAndTheFolderExactlyAsTheyWere() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item("card", Fixture.rich)
let before = try fixture.indexData("card")
try FileManager.default.setAttributes([.posixPermissions: 0o555], ofItemAtPath: folder.path)
defer { try? FileManager.default.setAttributes([.posixPermissions: 0o755], ofItemAtPath: folder.path) }
let error = writeFailure {
try BoardWriter.updateIndex(inItemFolder: folder, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Renamed"))
}
}
guard case .io = error?.reason else {
Issue.record("expected .io, got \(String(describing: error?.reason))")
return
}
// `updateIndex` read `Fixture.rich` (title: Original) successfully before the write
// itself failed — title enrichment engages even though the failure is `.io`, not a
// read/uneditable refusal.
#expect(error?.operation == .style(title: "Original"))
#expect(error?.path.hasSuffix("card/index.md") == true)
#expect(try fixture.indexData("card") == before)
#expect(try fixture.entryNames("card") == ["index.md"])
}
}
// MARK: - Renumber
/// 01-storage-format.md § Ordering: the renumber fallback — the sole exception to
/// "a reorder rewrites only the moved item's index.md".
struct BoardWriterRenumberTests {
/// Crowded orders whose display sequence disagrees with folder-name order, so the assignment
/// is provably by `order` first and name only as tie-break.
private func crowdedLane(_ fixture: WriterFixture) throws -> URL {
try fixture.item("lane/\(Child.a)", child(order: "1.0000003", title: "A"))
try fixture.item("lane/\(Child.b)", child(order: "1.0000001", title: "B"))
try fixture.item("lane/\(Child.c)", child(order: "1.0000002", title: "C"))
try fixture.item(
"lane/\(Child.deleted)",
"---\nschema: 1\norder: 0.5\ntitle: Gone\ndeleted: 2026-01-01T00:00:00Z\nmodified-by: claude\n---\nbody\n"
)
// Skipped for the same reasons BoardLoader skips them.
try fixture.item("lane/notes", "---\nschema: 1\norder: 1\ntitle: Stray\n---\nbody\n")
try FileManager.default.createDirectory(
at: fixture.url("lane/\(Child.indexless)"),
withIntermediateDirectories: true
)
return fixture.url("lane")
}
private func child(order: String, title: String) -> String {
"""
---
schema: 1
order: \(order)
title: \(title)
project: lanework # agent overlay
modified-by: claude
---
\(title) body
"""
}
@Test func visibleChildrenAreRenumberedInDisplayOrder() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let lane = try crowdedLane(fixture)
try BoardWriter.renumberVisibleChildren(of: lane)
let orders = try [Child.b, Child.c, Child.a].map {
try FrontmatterDocument.parse(fixture.indexText("lane/\($0)")).order
}
#expect(orders == [.valid(1024), .valid(2048), .valid(3072)])
#expect(try fixture.indexText("lane/\(Child.b)").contains("order: 1024\n"))
}
@Test func eachRewrittenChildIsStampedAndKeepsItsUnknownKeys() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let lane = try crowdedLane(fixture)
try BoardWriter.renumberVisibleChildren(of: lane)
for name in [Child.a, Child.b, Child.c] {
let text = try fixture.indexText("lane/\(name)")
let document = try FrontmatterDocument.parse(text)
#expect(document.modifiedBy == .missing)
#expect(document.modified.value != nil)
#expect(document.unknownFields.map(\.key) == ["project"])
#expect(text.contains("project: lanework # agent overlay\n"))
#expect(document.body.hasSuffix(" body\n"))
#expect(try fixture.entryNames("lane/\(name)") == ["index.md"])
}
}
@Test func tombstonedAndStrayChildrenAreUntouched() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let lane = try crowdedLane(fixture)
let tombstone = try fixture.indexData("lane/\(Child.deleted)")
let stray = try fixture.indexData("lane/notes")
try BoardWriter.renumberVisibleChildren(of: lane)
#expect(try fixture.indexData("lane/\(Child.deleted)") == tombstone)
#expect(try fixture.indexData("lane/notes") == stray)
}
/// A renumber runs over loaded, valid children: one broken sibling fails the whole
/// operation, and it fails before anything has been rewritten.
@Test func aChildWithAMalformedOrderFailsTheWholeRenumber() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("lane/\(Child.a)", child(order: "1.0000001", title: "A"))
try fixture.item("lane/\(Child.b)", "---\nschema: 1\norder: banana\ntitle: B\n---\nbody\n")
let untouched = try fixture.indexData("lane/\(Child.a)")
let error = writeFailure { try BoardWriter.renumberVisibleChildren(of: fixture.url("lane")) }
#expect(error?.reason == .unreadable(message: "malformed 'order' field: banana"))
#expect(error?.path.contains(Child.b) == true)
#expect(error?.operation == .renumberChildren)
#expect(try fixture.indexData("lane/\(Child.a)") == untouched)
}
@Test func aChildWithNoOrderFailsTheWholeRenumber() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("lane/\(Child.a)", child(order: "1.0000001", title: "A"))
try fixture.item("lane/\(Child.b)", "---\nschema: 1\ntitle: B\n---\nbody\n")
let untouched = try fixture.indexData("lane/\(Child.a)")
let error = writeFailure { try BoardWriter.renumberVisibleChildren(of: fixture.url("lane")) }
#expect(error?.reason == .unreadable(message: "missing required 'order' field"))
#expect(error?.path.contains(Child.b) == true)
#expect(try fixture.indexData("lane/\(Child.a)") == untouched)
}
@Test func aChildWithUneditableFrontmatterFailsTheWholeRenumber() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("lane/\(Child.a)", child(order: "1.0000001", title: "A"))
try fixture.item("lane/\(Child.b)", Fixture.flowMapping)
let untouched = try fixture.indexData("lane/\(Child.a)")
let error = writeFailure { try BoardWriter.renumberVisibleChildren(of: fixture.url("lane")) }
#expect(error?.reason == .uneditableFrontmatter(.keyWithoutOwnLine))
#expect(try fixture.indexData("lane/\(Child.a)") == untouched)
}
@Test func renumberingAnEmptyParentIsANoOp() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try FileManager.default.createDirectory(at: fixture.url("lane"), withIntermediateDirectories: true)
try BoardWriter.renumberVisibleChildren(of: fixture.url("lane"))
#expect(try fixture.entryNames("lane") == [])
}
}
// MARK: - Loader integration
struct BoardWriterLoaderIntegrationTests {
/// The temp files are dot-prefixed precisely so `BoardLoader`'s `.skipsHiddenFiles` never
/// sees a crashed write's residue — not as a stray warning, and not as a candidate.
@Test func leftoverTempFilesAreInvisibleToTheLoader() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("", "---\nschema: 1\ntitle: Board\n---\n")
try fixture.item(Child.a, "---\nschema: 1\norder: 1024\ntitle: Lane\n---\n")
for folder in ["", Child.a] {
let residue = fixture.url(folder).appendingPathComponent(".index.md.lanework-\(UUID().uuidString)")
try Data("half-written\n".utf8).write(to: residue)
}
let result = try BoardLoader.load(boardRoot: fixture.root)
#expect(result.warnings.isEmpty)
#expect(result.model.lanes.map(\.id.rawValue) == [Child.a])
}
/// A board written by the writer reloads to the same values it was given.
@Test func aWrittenBoardReloadsCleanly() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("", "---\nschema: 1\ntitle: Board\n---\n")
let lane = try fixture.item(Child.a, "---\nschema: 1\norder: 1024\ntitle: Lane\n---\n")
try fixture.item("\(Child.a)/\(Child.b)", "---\nschema: 1\norder: 1024\ntitle: Card\n---\nbody\n")
try BoardWriter.updateIndex(inItemFolder: lane, operation: .style(title: nil)) { document in
document.set(FrontmatterKeys.title, to: .string("Doing"))
}
let result = try BoardLoader.load(boardRoot: fixture.root)
#expect(result.warnings.isEmpty)
#expect(result.model.lanes.first?.title == .valid("Doing"))
#expect(result.model.lanes.first?.modifiedBy == .missing)
#expect(result.model.lanes.first?.modified.value != nil)
#expect(result.model.lanes.first?.cards.first?.title == .valid("Card"))
}
}
// MARK: - Create board
/// `BoardWriter.createBoard`: the folder (if missing) plus a freshly minted `index.md` — never
/// a rewrite, so these tests check what a brand-new file looks like rather than what a rewrite
/// preserved.
struct BoardWriterCreateBoardTests {
@Test func createsAFolderAndAValidIndexTheLoaderOpens() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = fixture.url("MyBoard.kanban")
try BoardWriter.createBoard(at: root, title: "My Board")
let result = try BoardLoader.load(boardRoot: root)
#expect(result.warnings.isEmpty)
#expect(result.model.schema == 1)
#expect(result.model.title == .valid("My Board"))
#expect(result.model.modifiedBy == .missing)
let created = try #require(result.model.created.value)
let modified = try #require(result.model.modified.value)
#expect(abs(created.timeIntervalSinceNow) < 60)
#expect(abs(modified.timeIntervalSinceNow) < 60)
}
@Test func keyOrderIsSchemaTitleCreatedModified() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = fixture.url("MyBoard.kanban")
try BoardWriter.createBoard(at: root, title: "My Board")
let document = try FrontmatterDocument.parse(fixture.indexText("MyBoard.kanban"))
#expect(document.keys == ["schema", "title", "created", "modified"])
}
@Test func aNilTitleWritesNoTitleKeyAndTheLoaderReadsItMissing() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = fixture.url("Untitled.kanban")
try BoardWriter.createBoard(at: root, title: nil)
let document = try FrontmatterDocument.parse(fixture.indexText("Untitled.kanban"))
#expect(document.keys == ["schema", "created", "modified"])
#expect(!document.contains(FrontmatterKeys.title))
let result = try BoardLoader.load(boardRoot: root)
#expect(result.model.title == .missing)
}
@Test func refusesToClobberAnExistingBoard() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let existing = "---\nschema: 1\ntitle: Existing\n---\nbody\n"
let root = try fixture.item("Existing.kanban", existing)
let error = writeFailure {
try BoardWriter.createBoard(at: root, title: "New")
}
guard case .io = error?.reason else {
Issue.record("expected .io, got \(String(describing: error?.reason))")
return
}
#expect(error?.path.hasSuffix("Existing.kanban/index.md") == true)
#expect(try fixture.indexText("Existing.kanban") == existing)
}
@Test func anExtensionLessBoardFolderIsCreatedAndOpensSuccessfully() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = fixture.url("PlainBoard")
try BoardWriter.createBoard(at: root, title: "Plain")
let result = try BoardLoader.load(boardRoot: root)
#expect(result.warnings.isEmpty)
#expect(result.model.title == .valid("Plain"))
}
@Test func createdEqualsModifiedAtCreationTime() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = fixture.url("Board.kanban")
try BoardWriter.createBoard(at: root, title: "Board")
let document = try FrontmatterDocument.parse(fixture.indexText("Board.kanban"))
#expect(document.rawValue(for: FrontmatterKeys.created) == document.rawValue(for: FrontmatterKeys.modified))
}
}
// MARK: - Create lane / card
/// `BoardWriter.createLane`/`createCard`: minting a fresh identity and placing it after the
/// current visible siblings (01-storage-format.md § Ordering). `fixture.root` doubles as the
/// board root for lane creation — `createChild` never reads the parent's own `index.md`, only
/// its children, so a bare directory is as good a board root as a fully-formed one for these
/// tests.
struct BoardWriterCreateChildTests {
@Test func mintsLowercaseUUIDShapedNamesDistinctAcrossCalls() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let first = try BoardWriter.createLane(inBoard: fixture.root, title: "Todo")
let second = try BoardWriter.createLane(inBoard: fixture.root, title: "Doing")
for id in [first, second] {
#expect(BoardLoader.isUUIDShaped(id.rawValue))
#expect(id.rawValue == id.rawValue.lowercased())
}
#expect(first != second)
}
@Test func laneKeyOrderIsSchemaTitleOrderCreatedModified() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let laneID = try BoardWriter.createLane(inBoard: fixture.root, title: "Lane")
let document = try FrontmatterDocument.parse(fixture.indexText(laneID.rawValue))
#expect(document.keys == ["schema", "title", "order", "created", "modified"])
#expect(document.schema == .valid(1))
#expect(document.modifiedBy == .missing)
}
@Test func anEmptyParentsFirstChildLandsAt1024() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let laneID = try BoardWriter.createLane(inBoard: fixture.root, title: "Only")
let document = try FrontmatterDocument.parse(fixture.indexText(laneID.rawValue))
#expect(document.order == .valid(1024))
}
@Test func appendsAfterVisibleSiblingsAtMaxPlus1024() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item(Child.a, "---\nschema: 1\norder: 1024\ntitle: A\n---\nbody\n")
try fixture.item(Child.b, "---\nschema: 1\norder: 2048\ntitle: B\n---\nbody\n")
let newID = try BoardWriter.createLane(inBoard: fixture.root, title: "New")
let document = try FrontmatterDocument.parse(fixture.indexText(newID.rawValue))
#expect(document.order == .valid(3072))
}
/// The highest-order sibling is tombstoned — tombstones are inert to ordering, so it must
/// not factor into the append target at all (not `9999 + 1024`, not anything derived from it).
@Test func aTombstonedHighestOrderSiblingIsExcludedFromTheAppendTarget() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item(Child.a, "---\nschema: 1\norder: 1024\ntitle: A\n---\nbody\n")
try fixture.item(
Child.deleted,
"---\nschema: 1\norder: 9999\ntitle: Gone\ndeleted: 2026-01-01T00:00:00Z\n---\nbody\n"
)
let newID = try BoardWriter.createLane(inBoard: fixture.root, title: "New")
let document = try FrontmatterDocument.parse(fixture.indexText(newID.rawValue))
#expect(document.order == .valid(2048))
}
/// A UUID-shaped sibling folder with no `index.md` — an interrupted create — is skipped
/// during the order scan, not fatal; the new item still lands correctly, and the board as a
/// whole still loads, surfacing only the loader's ordinary `.missingIndex` warning.
@Test func aSiblingFolderWithoutIndexIsSkippedNotFatal() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("", "---\nschema: 1\ntitle: Board\n---\n")
try fixture.item(Child.a, "---\nschema: 1\norder: 1024\ntitle: A\n---\nbody\n")
try FileManager.default.createDirectory(at: fixture.url(Child.indexless), withIntermediateDirectories: true)
let newID = try BoardWriter.createLane(inBoard: fixture.root, title: "New")
let document = try FrontmatterDocument.parse(fixture.indexText(newID.rawValue))
#expect(document.order == .valid(2048))
let result = try BoardLoader.load(boardRoot: fixture.root)
#expect(result.warnings == [.missingIndex(path: Child.indexless)])
#expect(Set(result.model.lanes.map(\.id.rawValue)) == Set([Child.a, newID.rawValue]))
}
@Test func aSiblingWithAMalformedOrderFailsTheCreateNamingTheSibling() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item(Child.a, "---\nschema: 1\norder: banana\ntitle: A\n---\nbody\n")
let before = try fixture.entryNames("")
let error = writeFailure {
_ = try BoardWriter.createLane(inBoard: fixture.root, title: "New")
}
#expect(error?.reason == .unreadable(message: "malformed 'order' field: banana"))
#expect(error?.path.contains(Child.a) == true)
#expect(error?.operation == .createLane)
// Nothing was minted: the scan fails before the new folder is ever created.
#expect(try fixture.entryNames("") == before)
}
@Test func aMissingParentFolderIsALoudUnreadableError() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let missingParent = fixture.url("does-not-exist")
let error = writeFailure {
_ = try BoardWriter.createLane(inBoard: missingParent, title: "New")
}
guard case .unreadable = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
}
@Test func aParentThatIsAFileIsALoudUnreadableError() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let filePath = fixture.root.appendingPathComponent("afile")
try Data("x".utf8).write(to: filePath)
let error = writeFailure {
_ = try BoardWriter.createLane(inBoard: filePath, title: "New")
}
guard case .unreadable = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
}
@Test func createdEqualsModifiedAtCreationTime() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let laneID = try BoardWriter.createLane(inBoard: fixture.root, title: "Lane")
let document = try FrontmatterDocument.parse(fixture.indexText(laneID.rawValue))
#expect(document.rawValue(for: FrontmatterKeys.created) == document.rawValue(for: FrontmatterKeys.modified))
}
/// `createCard` is `createLane` one level down — a lane folder (need not have its own
/// `index.md` for this to work; `createChild` never reads the parent's own file) is just as
/// good a parent as a board root.
@Test func createCardMintsUnderALaneFolderWithTheSameRules() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let laneID = try BoardWriter.createLane(inBoard: fixture.root, title: "Lane")
let laneFolder = fixture.url(laneID.rawValue)
let first = try BoardWriter.createCard(inLane: laneFolder, title: "First")
let second = try BoardWriter.createCard(inLane: laneFolder, title: "Second")
#expect(BoardLoader.isUUIDShaped(first.rawValue))
#expect(first != second)
let firstDocument = try FrontmatterDocument.parse(fixture.indexText("\(laneID.rawValue)/\(first.rawValue)"))
let secondDocument = try FrontmatterDocument.parse(fixture.indexText("\(laneID.rawValue)/\(second.rawValue)"))
#expect(firstDocument.order == .valid(1024))
#expect(secondDocument.order == .valid(2048))
}
}
// MARK: - Create round-trip
struct BoardWriterCreateIntegrationTests {
/// `createBoard` → `createLane` → `createCard` → `BoardLoader.load`: the whole structure
/// shows up, in append order, exactly as created.
@Test func createBoardCreateLaneCreateCardRoundTripsThroughTheLoader() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = fixture.url("Trip.kanban")
try BoardWriter.createBoard(at: root, title: "Trip")
let lane1 = try BoardWriter.createLane(inBoard: root, title: "Todo")
let lane2 = try BoardWriter.createLane(inBoard: root, title: "Doing")
let lane1Folder = root.appendingPathComponent(lane1.rawValue, isDirectory: true)
let card1 = try BoardWriter.createCard(inLane: lane1Folder, title: "First")
let card2 = try BoardWriter.createCard(inLane: lane1Folder, title: "Second")
let result = try BoardLoader.load(boardRoot: root)
#expect(result.warnings.isEmpty)
#expect(result.model.title == .valid("Trip"))
#expect(result.model.lanes.map(\.id.rawValue) == [lane1.rawValue, lane2.rawValue])
#expect(result.model.lanes[0].title == .valid("Todo"))
#expect(result.model.lanes[1].title == .valid("Doing"))
#expect(result.model.lanes[0].cards.map(\.id.rawValue) == [card1.rawValue, card2.rawValue])
#expect(result.model.lanes[0].cards[0].title == .valid("First"))
#expect(result.model.lanes[0].cards[1].title == .valid("Second"))
#expect(result.model.lanes[1].cards.isEmpty)
}
}
// MARK: - Editability scope: reads vs rewrites
/// The readable-but-uneditable pre-flight belongs only to operations that will *rewrite*
/// siblings. A flow-mapping sibling loads and renders normally (01-storage-format.md §
/// Frontmatter), so it must not block creating a new item beside it — but renumber, which
/// would have to rewrite that very file, refuses up front, before anything is written.
struct BoardWriterEditabilityScopeTests {
private static let flowSibling = "---\n{schema: 1, order: 5000}\n---\n"
@Test func createSucceedsBesideAnUneditableSibling() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("", "---\nschema: 1\n---\n")
try fixture.item(Child.a, Self.flowSibling)
let id = try BoardWriter.createLane(inBoard: fixture.root, title: "New")
let text = try fixture.indexText(id.rawValue)
#expect(text.contains("order: 6024"))
}
@Test func renumberRefusesOnAnUneditableSibling() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("", "---\nschema: 1\n---\n")
try fixture.item(Child.a, Self.flowSibling)
try fixture.item(Child.b, "---\nschema: 1\norder: 1024\n---\n")
let before = try fixture.indexData(Child.b)
let error = writeFailure { try BoardWriter.renumberVisibleChildren(of: fixture.root) }
#expect(error?.reason == .uneditableFrontmatter(.keyWithoutOwnLine))
#expect(error?.path.hasSuffix("\(Child.a)/index.md") == true)
#expect(try fixture.indexData(Child.b) == before)
#expect(try fixture.indexText(Child.a) == Self.flowSibling)
}
}
// MARK: - Move
/// 01-storage-format.md § Fractal layout ▸ Rules, "Identity lifecycle: moves keep the UUID,
/// copies mint fresh ones" — the move half, including the import boundary where a colliding
/// UUID is degraded to a copy.
struct BoardWriterMoveTests {
/// Board `A.kanban`: two lanes, each holding one card, everything rich enough that a
/// byte-level assertion means something.
private func boardA(_ fixture: WriterFixture) throws {
try fixture.item("A.kanban", Item.board)
try fixture.item("A.kanban/\(Ident.lane1)", Item.rich(order: "1024", title: "Todo"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card1)", Item.rich(order: "1024", title: "Card One"))
try fixture.item("A.kanban/\(Ident.lane2)", Item.rich(order: "2048", title: "Doing"))
try fixture.item("A.kanban/\(Ident.lane2)/\(Ident.card2)", Item.rich(order: "1024", title: "Card Two"))
}
/// Board `B.kanban`: a separate identity namespace with two lanes of its own, one of them
/// holding a card.
private func boardB(_ fixture: WriterFixture) throws {
try fixture.item("B.kanban", Item.board)
try fixture.item("B.kanban/\(Ident.lane3)", Item.rich(order: "1024", title: "Inbox"))
try fixture.item("B.kanban/\(Ident.lane3)/\(Ident.card3)", Item.rich(order: "1024", title: "Card Three"))
try fixture.item("B.kanban/\(Ident.lane4)", Item.rich(order: "2048", title: "Done"))
}
@discardableResult
private func move(
_ fixture: WriterFixture,
_ source: String,
to destination: String,
from sourceBoard: String = "A.kanban",
into destinationBoard: String = "A.kanban",
order: Double? = nil
) throws -> MoveResult {
try BoardWriter.moveItem(
at: fixture.url(source),
toParent: fixture.url(destination),
sourceBoardRoot: fixture.url(sourceBoard),
destinationBoardRoot: fixture.url(destinationBoard),
order: order
)
}
/// The everyday move: a card to another lane in the same board. The folder travels whole,
/// its identity travels with it, and the only lines that may differ are the ones the
/// destination `order` and the app-write stamps own.
@Test func aCrossLaneMoveKeepsTheIdentityAndRewritesOnlyTheOrderAndStamps() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
let before = try fixture.indexText("A.kanban/\(Ident.lane1)/\(Ident.card1)")
let siblingBefore = try fixture.indexData("A.kanban/\(Ident.lane2)/\(Ident.card2)")
let result = try move(fixture, "A.kanban/\(Ident.lane1)/\(Ident.card1)", to: "A.kanban/\(Ident.lane2)")
#expect(result.id.rawValue == Ident.card1)
#expect(result.reminted.isEmpty)
#expect(try fixture.entryNames("A.kanban/\(Ident.lane1)") == ["index.md"])
let after = try fixture.indexText("A.kanban/\(Ident.lane2)/\(Ident.card1)")
#expect(lines(of: after, excludingKeys: rewrittenKeys) == lines(of: before, excludingKeys: rewrittenKeys))
let document = try FrontmatterDocument.parse(after)
let source = try FrontmatterDocument.parse(before)
#expect(document.order == .valid(2048))
#expect(document.created == source.created)
#expect(document.modifiedBy == .missing)
#expect(abs(try #require(document.modified.value).timeIntervalSinceNow) < 60)
#expect(document.unknownFields.map(\.key) == ["project", "labels"])
#expect(after.contains("project: lanework # agent overlay\n"))
// The move rewrites exactly one file: a destination sibling is not even opened.
#expect(try fixture.indexData("A.kanban/\(Ident.lane2)/\(Ident.card2)") == siblingBefore)
#expect(try BoardLoader.load(boardRoot: fixture.url("A.kanban")).warnings.isEmpty)
}
@Test func anExplicitOrderIsWrittenVerbatim() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try move(fixture, "A.kanban/\(Ident.lane1)/\(Ident.card1)", to: "A.kanban/\(Ident.lane2)", order: 1536)
let document = try FrontmatterDocument.parse(fixture.indexText("A.kanban/\(Ident.lane2)/\(Ident.card1)"))
#expect(document.order == .valid(1536))
}
/// Boards are independent identity namespaces: an import that collides with nothing is an
/// ordinary move, UUID and `created` intact.
@Test func aCrossBoardMoveWithoutACollisionKeepsTheIdentity() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try boardB(fixture)
let before = try fixture.indexText("A.kanban/\(Ident.lane1)/\(Ident.card1)")
let result = try move(
fixture, "A.kanban/\(Ident.lane1)/\(Ident.card1)",
to: "B.kanban/\(Ident.lane3)", into: "B.kanban"
)
#expect(result.id.rawValue == Ident.card1)
#expect(result.reminted.isEmpty)
#expect(!fixture.exists("A.kanban/\(Ident.lane1)/\(Ident.card1)"))
let after = try fixture.indexText("B.kanban/\(Ident.lane3)/\(Ident.card1)")
#expect(lines(of: after, excludingKeys: rewrittenKeys) == lines(of: before, excludingKeys: rewrittenKeys))
#expect(try FrontmatterDocument.parse(after).order == .valid(2048))
let result2 = try BoardLoader.load(boardRoot: fixture.url("B.kanban"))
#expect(result2.warnings.isEmpty)
#expect(result2.model.lanes.first?.cards.map(\.id.rawValue) == [Ident.card3, Ident.card1])
}
/// The import boundary: the arriving UUID already exists elsewhere in the destination board,
/// so it is degraded to a copy — fresh identity, content untouched, source gone as for any
/// move.
@Test func anArrivingIdentityTheDestinationBoardAlreadyHoldsIsReminted() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try boardB(fixture)
try fixture.item("B.kanban/\(Ident.lane3)/\(Ident.card1)", Item.rich(order: "2048", title: "Stale Twin"))
let twinBefore = try fixture.indexData("B.kanban/\(Ident.lane3)/\(Ident.card1)")
let before = try fixture.indexText("A.kanban/\(Ident.lane1)/\(Ident.card1)")
let result = try move(
fixture, "A.kanban/\(Ident.lane1)/\(Ident.card1)",
to: "B.kanban/\(Ident.lane4)", into: "B.kanban"
)
let minted = result.id.rawValue
#expect(BoardLoader.isUUIDShaped(minted))
#expect(minted != Ident.card1)
#expect(result.reminted == [MoveResult.Remint(from: ItemID(rawValue: Ident.card1), to: ItemID(rawValue: minted))])
// Content arrived intact — a remint renames a folder, it does not edit a file.
let after = try fixture.indexText("B.kanban/\(Ident.lane4)/\(minted)")
#expect(lines(of: after, excludingKeys: rewrittenKeys) == lines(of: before, excludingKeys: rewrittenKeys))
#expect(try FrontmatterDocument.parse(after).title == .valid("Card One"))
#expect(!fixture.exists("A.kanban/\(Ident.lane1)/\(Ident.card1)"))
#expect(try fixture.indexData("B.kanban/\(Ident.lane3)/\(Ident.card1)") == twinBefore)
}
/// **Identity comparison is UUID-value equality, never string equality** (01-storage-format.md
/// § Fractal layout ▸ Rules, settled): the destination board already holds the arriving UUID
/// spelled in *uppercase* — an agent's `uuidgen` card — so the two are one identity and the
/// import boundary must remint. A verbatim string set would sail straight past this and leave
/// a duplicate UUID in the board.
@Test func aCollisionSpelledInADifferentCaseIsStillOneIdentityAndRemints() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try boardB(fixture)
let arriving = "abcdef01-2345-6789-abcd-ef0123456789"
let twin = arriving.uppercased() // The same UUID, as `uuidgen` would have printed it.
try fixture.item("A.kanban/\(Ident.lane1)/\(arriving)", Item.rich(order: "3072", title: "Card One"))
try fixture.item("B.kanban/\(Ident.lane3)/\(twin)", Item.rich(order: "2048", title: "Stale Twin"))
let twinBefore = try fixture.indexData("B.kanban/\(Ident.lane3)/\(twin)")
let result = try move(
fixture, "A.kanban/\(Ident.lane1)/\(arriving)",
to: "B.kanban/\(Ident.lane4)", into: "B.kanban"
)
let minted = result.id.rawValue
#expect(BoardLoader.isUUIDShaped(minted))
#expect(ItemID(rawValue: minted) != ItemID(rawValue: arriving))
#expect(ItemID(rawValue: minted) != ItemID(rawValue: twin))
#expect(result.reminted == [MoveResult.Remint(from: ItemID(rawValue: arriving), to: ItemID(rawValue: minted))])
#expect(try FrontmatterDocument.parse(fixture.indexText("B.kanban/\(Ident.lane4)/\(minted)")).title
== .valid("Card One"))
// The resident twin is untouched, and the source left as for any move.
#expect(try fixture.indexData("B.kanban/\(Ident.lane3)/\(twin)") == twinBefore)
#expect(!fixture.exists("A.kanban/\(Ident.lane1)/\(arriving)"))
}
/// The same rule one level down: a lane arrives carrying a card whose UUID the destination
/// board already holds under a different case-spelling — that card, and only that card, is
/// reminted.
@Test func aLaneMoveRemintsAChildCollidingOnlyByCaseSpelling() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try boardB(fixture)
let arriving = "abcdef01-2345-6789-abcd-ef0123456789"
let twin = arriving.uppercased()
try fixture.item("A.kanban/\(Ident.lane1)/\(arriving)", Item.rich(order: "3072", title: "Colliding"))
try fixture.item("B.kanban/\(Ident.lane3)/\(twin)", Item.rich(order: "2048", title: "B's Own"))
let result = try move(fixture, "A.kanban/\(Ident.lane1)", to: "B.kanban", into: "B.kanban")
#expect(result.id.rawValue == Ident.lane1)
#expect(result.reminted.map(\.from.rawValue) == [arriving])
let minted = try #require(result.reminted.first?.to.rawValue)
#expect(fixture.exists("B.kanban/\(Ident.lane1)/\(minted)"))
#expect(!fixture.exists("B.kanban/\(Ident.lane1)/\(arriving)"))
// The card that collided with nothing kept its identity.
#expect(fixture.exists("B.kanban/\(Ident.lane1)/\(Ident.card1)"))
}
/// The collision sitting in the very lane being dropped into — the case a move-then-rename
/// could not repair, because the plain move would fail on the existing name.
@Test func aCollisionInTheDestinationParentItselfIsStillReminted() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try boardB(fixture)
try fixture.item("B.kanban/\(Ident.lane3)/\(Ident.card1)", Item.rich(order: "2048", title: "Stale Twin"))
let result = try move(
fixture, "A.kanban/\(Ident.lane1)/\(Ident.card1)",
to: "B.kanban/\(Ident.lane3)", into: "B.kanban"
)
#expect(result.id.rawValue != Ident.card1)
#expect(result.reminted.count == 1)
#expect(try FrontmatterDocument.parse(fixture.indexText("B.kanban/\(Ident.lane3)/\(result.id.rawValue)")).title
== .valid("Card One"))
#expect(try FrontmatterDocument.parse(fixture.indexText("B.kanban/\(Ident.lane3)/\(Ident.card1)")).title
== .valid("Stale Twin"))
}
/// Degradation is per folder at the finest grain: a lane arriving with one colliding card is
/// still a lane *move*, and only that card is reminted — its bytes untouched, its
/// non-colliding siblings' identities intact.
@Test func aLaneMoveRemintsOnlyTheCollidingCard() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try boardB(fixture)
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card2)", Item.rich(order: "2048", title: "Card Two"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card4)", Item.rich(order: "3072", title: "Card Four"))
// Only this one already exists over in B.
try fixture.item("B.kanban/\(Ident.lane3)/\(Ident.card2)", Item.rich(order: "2048", title: "B's Own"))
let laneBefore = try fixture.indexText("A.kanban/\(Ident.lane1)")
let collidingBefore = try fixture.indexData("A.kanban/\(Ident.lane1)/\(Ident.card2)")
let keptBefore = try fixture.indexData("A.kanban/\(Ident.lane1)/\(Ident.card1)")
let result = try move(fixture, "A.kanban/\(Ident.lane1)", to: "B.kanban", into: "B.kanban")
#expect(result.id.rawValue == Ident.lane1)
#expect(result.reminted.map(\.from.rawValue) == [Ident.card2])
let minted = try #require(result.reminted.first?.to.rawValue)
#expect(BoardLoader.isUUIDShaped(minted))
// The repair is folder-name-only: the reminted card's file is byte-identical.
#expect(try fixture.indexData("B.kanban/\(Ident.lane1)/\(minted)") == collidingBefore)
#expect(try fixture.indexData("B.kanban/\(Ident.lane1)/\(Ident.card1)") == keptBefore)
#expect(fixture.exists("B.kanban/\(Ident.lane1)/\(Ident.card4)"))
#expect(!fixture.exists("B.kanban/\(Ident.lane1)/\(Ident.card2)"))
// The lane's own index.md is the one file the move rewrote.
let laneAfter = try fixture.indexText("B.kanban/\(Ident.lane1)")
#expect(lines(of: laneAfter, excludingKeys: rewrittenKeys) == lines(of: laneBefore, excludingKeys: rewrittenKeys))
#expect(try FrontmatterDocument.parse(laneAfter).order == .valid(3072))
#expect(try FrontmatterDocument.parse(laneAfter).modifiedBy == .missing)
#expect(!fixture.exists("A.kanban/\(Ident.lane1)"))
#expect(try BoardLoader.load(boardRoot: fixture.url("B.kanban")).warnings.isEmpty)
}
/// Tombstones are on disk, so they are identities: arriving on top of one would be exactly
/// the duplicate the import boundary exists to prevent.
@Test func aCollisionWithATombstonedDestinationItemStillRemints() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try boardB(fixture)
try fixture.item(
"B.kanban/\(Ident.lane4)/\(Ident.card1)",
"---\nschema: 1\norder: 1024\ntitle: Gone\ndeleted: 2026-01-01T00:00:00Z\n---\nbody\n"
)
let result = try move(
fixture, "A.kanban/\(Ident.lane1)/\(Ident.card1)",
to: "B.kanban/\(Ident.lane3)", into: "B.kanban"
)
#expect(result.id.rawValue != Ident.card1)
#expect(result.reminted.map(\.from.rawValue) == [Ident.card1])
#expect(try FrontmatterDocument.parse(fixture.indexText("B.kanban/\(Ident.lane4)/\(Ident.card1)")).deleted.value != nil)
}
/// Boards are independent identity namespaces: the same UUID living in another board is not
/// this move's business — only an import boundary ever looks.
@Test func aSameBoardMoveNeverRemintsEvenWhenAnotherBoardSharesTheUUID() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try boardB(fixture)
try fixture.item("B.kanban/\(Ident.lane3)/\(Ident.card1)", Item.rich(order: "2048", title: "Fork"))
let result = try move(fixture, "A.kanban/\(Ident.lane1)/\(Ident.card1)", to: "A.kanban/\(Ident.lane2)")
#expect(result.id.rawValue == Ident.card1)
#expect(result.reminted.isEmpty)
#expect(fixture.exists("A.kanban/\(Ident.lane2)/\(Ident.card1)"))
#expect(fixture.exists("B.kanban/\(Ident.lane3)/\(Ident.card1)"))
}
/// Discover before you write: the move has to rewrite the moved item's `order`, so a file it
/// cannot round-trip refuses the gesture while the folder is still where it was.
@Test func anUneditableItemRefusesTheMoveAndTheFolderDoesNotTravel() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card3)", Item.uneditable)
let error = writeFailure {
try move(fixture, "A.kanban/\(Ident.lane1)/\(Ident.card3)", to: "A.kanban/\(Ident.lane2)")
}
#expect(error?.reason == .uneditableFrontmatter(.keyWithoutOwnLine))
// The pre-flight read the source's document (`Item.uneditable`, title: Odd) before the
// shape refusal, so the title survives into the thrown error.
#expect(error?.operation == .move(title: "Odd"))
#expect(try fixture.indexText("A.kanban/\(Ident.lane1)/\(Ident.card3)") == Item.uneditable)
#expect(try fixture.entryNames("A.kanban/\(Ident.lane2)") == [Ident.card2, "index.md"])
}
@Test func aMissingDestinationParentRefusesTheMove() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
let before = try fixture.indexData("A.kanban/\(Ident.lane1)/\(Ident.card1)")
let error = writeFailure {
try move(fixture, "A.kanban/\(Ident.lane1)/\(Ident.card1)", to: "A.kanban/nowhere")
}
guard case .unreadable = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(try fixture.indexData("A.kanban/\(Ident.lane1)/\(Ident.card1)") == before)
}
@Test func aDestinationParentThatIsAFileRefusesTheMove() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try fixture.file("A.kanban/notes.txt", Data("x".utf8))
let error = writeFailure {
try move(fixture, "A.kanban/\(Ident.lane1)/\(Ident.card1)", to: "A.kanban/notes.txt")
}
guard case .unreadable = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(fixture.exists("A.kanban/\(Ident.lane1)/\(Ident.card1)"))
}
/// Level detection is by name shape, so a stray is not an item: moving one would invent an
/// identity the loader would go on ignoring.
@Test func aStrayFolderIsNotAnItemAndCannotBeMoved() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try boardA(fixture)
try fixture.item("A.kanban/\(Ident.lane1)/notes", Item.rich(order: "1024", title: "Stray"))
let error = writeFailure {
try move(fixture, "A.kanban/\(Ident.lane1)/notes", to: "A.kanban/\(Ident.lane2)")
}
guard case let .unreadable(message) = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(message.contains("UUID-shaped"))
#expect(fixture.exists("A.kanban/\(Ident.lane1)/notes"))
}
}
// MARK: - Copy
/// 01-storage-format.md § Fractal layout ▸ Rules, "Identity lifecycle" — the copy half: fresh
/// UUIDs for every folder materialized, `created` kept (a fork) or restamped (born from a
/// template), `modified-by` cleared because a copy is an app write.
struct BoardWriterCopyTests {
/// One board, one lane, two cards — the source of every copy below.
private func board(_ fixture: WriterFixture) throws {
try fixture.item("A.kanban", Item.board)
try fixture.item("A.kanban/\(Ident.lane1)", Item.rich(order: "1024", title: "Todo"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card1)", Item.rich(order: "1024", title: "Card One"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card2)", Item.rich(order: "2048", title: "Card Two"))
try fixture.item("A.kanban/\(Ident.lane2)", Item.rich(order: "2048", title: "Doing"))
}
/// Content that must travel verbatim because the copy never reads it: two attachments (one
/// in a subfolder the app never creates but preserves) and a stray file.
private func attach(_ fixture: WriterFixture, to cardPath: String) throws {
try fixture.file("\(cardPath)/attachments/sketch.png", Data([0x89, 0x50, 0x4E, 0x47, 0x00, 0xFF]))
try fixture.file("\(cardPath)/attachments/sub/deep.bin", Data([0x00, 0x01, 0x02, 0xFE]))
try fixture.file("\(cardPath)/notes.txt", Data("hand-written\n".utf8))
}
/// The ⌥-drag duplicate: a card copied beside itself. Fresh identity, `created` kept,
/// `modified` stamped, `modified-by` cleared, everything else byte-identical.
@Test func aCardCopyMintsAFreshIdentityAndForksTheStamps() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
let source = "A.kanban/\(Ident.lane1)/\(Ident.card1)"
let before = try fixture.indexData(source)
let id = try BoardWriter.copyItem(
at: fixture.url(source),
toParent: fixture.url("A.kanban/\(Ident.lane1)"),
order: nil,
stamps: .fork
)
#expect(BoardLoader.isUUIDShaped(id.rawValue))
#expect(id.rawValue != Ident.card1)
let copy = try fixture.indexText("A.kanban/\(Ident.lane1)/\(id.rawValue)")
let original = String(decoding: before, as: UTF8.self)
#expect(lines(of: copy, excludingKeys: rewrittenKeys) == lines(of: original, excludingKeys: rewrittenKeys))
let document = try FrontmatterDocument.parse(copy)
let sourceDocument = try FrontmatterDocument.parse(original)
#expect(document.order == .valid(3072))
#expect(document.created == sourceDocument.created)
#expect(document.modifiedBy == .missing)
#expect(abs(try #require(document.modified.value).timeIntervalSinceNow) < 60)
#expect(document.unknownFields.map(\.key) == ["project", "labels"])
#expect(document.body == "Card One body — with *markdown*.\n")
// The source is never touched, on any path.
#expect(try fixture.indexData(source) == before)
}
@Test func anExplicitOrderIsWrittenVerbatim() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
let id = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)/\(Ident.card1)"),
toParent: fixture.url("A.kanban/\(Ident.lane2)"),
order: 512,
stamps: .fork
)
let document = try FrontmatterDocument.parse(fixture.indexText("A.kanban/\(Ident.lane2)/\(id.rawValue)"))
#expect(document.order == .valid(512))
}
/// A copied lane's cards are new cards, not the same cards seen twice: every folder the copy
/// materialized has a fresh identity, at every depth.
@Test func aLaneCopyMintsFreshIdentitiesAtEveryLevel() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
let id = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)"),
toParent: fixture.url("A.kanban"),
order: nil,
stamps: .fork
)
#expect(id.rawValue != Ident.lane1)
let copied = try childrenByTitle(of: "A.kanban/\(id.rawValue)", in: fixture)
#expect(Set(copied.keys) == ["Card One", "Card Two"])
#expect(Set(copied.values).isDisjoint(with: [Ident.card1, Ident.card2]))
#expect(copied.values.allSatisfy(BoardLoader.isUUIDShaped))
// Ranks travel with the cards; only the copied *root* gets a new one.
let one = try FrontmatterDocument.parse(fixture.indexText("A.kanban/\(id.rawValue)/\(try #require(copied["Card One"]))"))
let two = try FrontmatterDocument.parse(fixture.indexText("A.kanban/\(id.rawValue)/\(try #require(copied["Card Two"]))"))
#expect(one.order == .valid(1024))
#expect(two.order == .valid(2048))
#expect(one.created == .valid(try #require(FrontmatterDocument.parse(Item.rich(order: "1024", title: "x")).created.value)))
#expect(one.modifiedBy == .missing)
#expect(two.modifiedBy == .missing)
#expect(try FrontmatterDocument.parse(fixture.indexText("A.kanban/\(id.rawValue)")).order == .valid(3072))
let result = try BoardLoader.load(boardRoot: fixture.url("A.kanban"))
#expect(result.warnings.isEmpty)
#expect(result.model.lanes.map(\.id.rawValue) == [Ident.lane1, Ident.lane2, id.rawValue])
}
/// Attachments, their subfolders, and strays travel byte-for-byte — the copy never opens
/// them, so there is nothing to get wrong.
@Test func attachmentsSubfoldersAndStraysTravelByteIdentically() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
try attach(fixture, to: "A.kanban/\(Ident.lane1)/\(Ident.card1)")
let id = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)"),
toParent: fixture.url("A.kanban"),
order: nil,
stamps: .fork
)
let copied = try childrenByTitle(of: "A.kanban/\(id.rawValue)", in: fixture)
let card = try #require(copied["Card One"])
for path in ["attachments/sketch.png", "attachments/sub/deep.bin", "notes.txt"] {
#expect(
try fixture.data("A.kanban/\(id.rawValue)/\(card)/\(path)")
== fixture.data("A.kanban/\(Ident.lane1)/\(Ident.card1)/\(path)")
)
}
// `attachments/` is not UUID-shaped, so the remint walk never descends into it.
#expect(try fixture.entryNames("A.kanban/\(id.rawValue)/\(card)").contains("attachments"))
}
/// A symlink surviving a copy as a symlink — never resolved, never followed to its target's
/// bytes — is `FileManager.copyItem`'s own default behavior (01-storage-format.md § Fractal
/// layout ▸ Rules, "Symlinks are never traversed": "Copy flows copy the link itself, never its
/// target"). Nothing in `copyItem` arranges this on purpose — it falls out of leaning on
/// `FileManager.copyItem` for the whole subtree rather than reading files one by one — so this
/// pins the behavior against a future change (a different copy mechanism, a Foundation
/// update) silently starting to dereference links instead.
@Test func copyItemPreservesASymlinkVerbatimInsideACopiedSubtree() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
let cardPath = "A.kanban/\(Ident.lane1)/\(Ident.card1)"
try fixture.file("\(cardPath)/attachments/real.png", Data([0x89, 0x50, 0x4E, 0x47]))
try FileManager.default.createSymbolicLink(
atPath: fixture.url("\(cardPath)/attachments/linked.png").path,
withDestinationPath: "real.png"
)
let id = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)"),
toParent: fixture.url("A.kanban"),
order: nil,
stamps: .fork
)
let copied = try childrenByTitle(of: "A.kanban/\(id.rawValue)", in: fixture)
let card = try #require(copied["Card One"])
let copiedLink = fixture.url("A.kanban/\(id.rawValue)/\(card)/attachments/linked.png")
let values = try copiedLink.resourceValues(forKeys: [.isSymbolicLinkKey])
#expect(values.isSymbolicLink == true)
#expect(try FileManager.default.destinationOfSymbolicLink(atPath: copiedLink.path) == "real.png")
// The source link is untouched too — a copy never touches what it reads from.
#expect(
try FileManager.default.destinationOfSymbolicLink(
atPath: fixture.url("\(cardPath)/attachments/linked.png").path
) == "real.png"
)
}
/// Template instantiation: born today, not forked — `created` and `modified` both fresh, and
/// the same `Date` for the whole tree.
@Test func bornStampsCreatedAndModifiedFreshAtEveryLevel() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
let id = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)"),
toParent: fixture.url("A.kanban"),
order: nil,
stamps: .born
)
let copied = try childrenByTitle(of: "A.kanban/\(id.rawValue)", in: fixture)
let paths = ["A.kanban/\(id.rawValue)"] + copied.values.map { "A.kanban/\(id.rawValue)/\($0)" }
for path in paths {
let document = try FrontmatterDocument.parse(fixture.indexText(path))
let created = try #require(document.created.value)
let modified = try #require(document.modified.value)
#expect(abs(created.timeIntervalSinceNow) < 60)
#expect(abs(created.timeIntervalSince(modified)) < 2)
#expect(document.modifiedBy == .missing)
}
}
/// The leniency below the root: a nested file the surgical editor cannot key is copied
/// verbatim rather than failing the gesture — stale `modified-by` and all — while its
/// editable siblings are stamped normally.
@Test func aNestedUneditableFileCopiesVerbatimWhileItsSiblingsAreStamped() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card3)", Item.uneditable)
let id = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)"),
toParent: fixture.url("A.kanban"),
order: nil,
stamps: .fork
)
let copied = try childrenByTitle(of: "A.kanban/\(id.rawValue)", in: fixture)
#expect(try fixture.indexText("A.kanban/\(id.rawValue)/\(try #require(copied["Odd"]))") == Item.uneditable)
#expect(try FrontmatterDocument.parse(fixture.indexText("A.kanban/\(id.rawValue)/\(try #require(copied["Card One"]))"))
.modifiedBy == .missing)
}
/// A UUID-shaped folder with no `index.md` — interrupted-create residue — is reminted and
/// carried like any other folder, and simply not rewritten: the same skip the loader applies.
@Test func aNestedFolderWithoutAnIndexIsCopiedAndRemintedButNotRewritten() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
try FileManager.default.createDirectory(
at: fixture.url("A.kanban/\(Ident.lane1)/\(Ident.indexless)"),
withIntermediateDirectories: true
)
let id = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)"),
toParent: fixture.url("A.kanban"),
order: nil,
stamps: .fork
)
let names = try fixture.entryNames("A.kanban/\(id.rawValue)").filter(BoardLoader.isUUIDShaped)
#expect(names.count == 3)
#expect(Set(names).isDisjoint(with: [Ident.card1, Ident.card2, Ident.indexless]))
let orphan = try #require(names.first { !fixture.exists("A.kanban/\(id.rawValue)/\($0)/index.md") })
#expect(try fixture.entryNames("A.kanban/\(id.rawValue)/\(orphan)") == [])
}
/// The root gets no leniency: it must be rewritten to carry its new `order`, so an
/// uneditable one refuses before anything is materialized.
@Test func anUneditableRootRefusesTheCopyAndMaterializesNothing() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card3)", Item.uneditable)
let before = try fixture.entryNames("A.kanban/\(Ident.lane2)")
let error = writeFailure {
_ = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)/\(Ident.card3)"),
toParent: fixture.url("A.kanban/\(Ident.lane2)"),
order: nil,
stamps: .fork
)
}
#expect(error?.reason == .uneditableFrontmatter(.keyWithoutOwnLine))
// Same enrichment as the move pre-flight: the root's document (title: Odd) was read
// before the uneditable-shape refusal fired.
#expect(error?.operation == .copy(title: "Odd"))
#expect(try fixture.entryNames("A.kanban/\(Ident.lane2)") == before)
}
/// All-or-nothing at the destination: a failure part-way through leaves no half-copied tree,
/// because a partial copy is pure residue — nothing was there before.
@Test func aFailedCopyLeavesNothingAtTheDestination() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
let unreadable = fixture.url("A.kanban/\(Ident.lane1)/\(Ident.card2)").appendingPathComponent("index.md")
try FileManager.default.setAttributes([.posixPermissions: 0o000], ofItemAtPath: unreadable.path)
defer { try? FileManager.default.setAttributes([.posixPermissions: 0o644], ofItemAtPath: unreadable.path) }
let before = try fixture.entryNames("A.kanban")
let error = writeFailure {
_ = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)"),
toParent: fixture.url("A.kanban"),
order: nil,
stamps: .fork
)
}
guard case .io = error?.reason else {
Issue.record("expected .io, got \(String(describing: error?.reason))")
return
}
#expect(try fixture.entryNames("A.kanban") == before)
}
/// A copy always mints, so the import boundary has nothing to do here: landing in a board
/// that already holds the source's UUID is not even a special case.
@Test func aCopyIntoABoardHoldingTheSameUUIDMintsAnywayWithoutError() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try board(fixture)
try fixture.item("B.kanban", Item.board)
try fixture.item("B.kanban/\(Ident.lane3)", Item.rich(order: "1024", title: "Inbox"))
try fixture.item("B.kanban/\(Ident.lane3)/\(Ident.card1)", Item.rich(order: "1024", title: "Twin"))
let id = try BoardWriter.copyItem(
at: fixture.url("A.kanban/\(Ident.lane1)/\(Ident.card1)"),
toParent: fixture.url("B.kanban/\(Ident.lane3)"),
order: nil,
stamps: .fork
)
#expect(id.rawValue != Ident.card1)
#expect(try FrontmatterDocument.parse(fixture.indexText("B.kanban/\(Ident.lane3)/\(id.rawValue)")).title
== .valid("Card One"))
#expect(try FrontmatterDocument.parse(fixture.indexText("B.kanban/\(Ident.lane3)/\(Ident.card1)")).title
== .valid("Twin"))
#expect(try BoardLoader.load(boardRoot: fixture.url("B.kanban")).warnings.isEmpty)
}
}
// MARK: - Delete / Restore
/// `BoardWriter.deleteItem`/`restoreItem` — the tombstone half of 01-storage-format.md §
/// Deletion: `deleted: <now>` written into the item's own `index.md` in place, and Put Back
/// (`remove(deleted)`) undoing exactly that. The folder never moves; hiding a tombstoned
/// subtree is the renderer's ancestor walk, not anything either call does — a deleted lane's
/// cards are never touched.
struct BoardWriterDeleteRestoreTests {
@Test func deletingALaneWritesATombstoneInPlaceAndPreservesEverythingElse() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("A.kanban", Item.board)
let laneFolder = try fixture.item("A.kanban/\(Ident.lane1)", Item.rich(order: "1024", title: "Todo"))
let before = try fixture.indexText("A.kanban/\(Ident.lane1)")
try BoardWriter.deleteItem(at: laneFolder)
// Same path, same name — a tombstone never moves or renames the folder.
#expect(fixture.exists("A.kanban/\(Ident.lane1)"))
#expect(try fixture.entryNames("A.kanban/\(Ident.lane1)") == ["index.md"])
let after = try fixture.indexText("A.kanban/\(Ident.lane1)")
let stamped = [FrontmatterKeys.modified, FrontmatterKeys.modifiedBy, FrontmatterKeys.deleted]
#expect(lines(of: after, excludingKeys: stamped) == lines(of: before, excludingKeys: stamped))
let document = try FrontmatterDocument.parse(after)
#expect(document.unknownFields.map(\.key) == ["project", "labels"])
#expect(document.body.hasSuffix("body — with *markdown*.\n"))
#expect(document.modifiedBy == .missing)
#expect(abs(try #require(document.modified.value).timeIntervalSinceNow) < 60)
let deleted = try #require(document.deleted.value)
#expect(abs(deleted.timeIntervalSinceNow) < 60)
let result = try BoardLoader.load(boardRoot: fixture.url("A.kanban"))
#expect(result.model.lanes.first?.isDeleted == true)
}
/// Hiding beneath is the renderer's walk, not a stored flag: deleting a lane writes only
/// the lane's own file.
@Test func deletingALaneLeavesItsNestedCardUntouched() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("A.kanban", Item.board)
let laneFolder = try fixture.item("A.kanban/\(Ident.lane1)", Item.rich(order: "1024", title: "Todo"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card1)", Item.rich(order: "1024", title: "Card One"))
let cardBefore = try fixture.indexData("A.kanban/\(Ident.lane1)/\(Ident.card1)")
try BoardWriter.deleteItem(at: laneFolder)
#expect(try fixture.indexData("A.kanban/\(Ident.lane1)/\(Ident.card1)") == cardBefore)
}
@Test func loaderRoundTripDeletingACardShowsItDeletedStillInTheSnapshotAtItsRecordedOrder() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("A.kanban", Item.board)
try fixture.item("A.kanban/\(Ident.lane1)", Item.rich(order: "1024", title: "Todo"))
let cardFolder = try fixture.item(
"A.kanban/\(Ident.lane1)/\(Ident.card1)", Item.rich(order: "1024", title: "Card One")
)
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card2)", Item.rich(order: "2048", title: "Card Two"))
try BoardWriter.deleteItem(at: cardFolder)
let result = try BoardLoader.load(boardRoot: fixture.url("A.kanban"))
#expect(result.warnings.isEmpty)
let cards = try #require(result.model.lanes.first?.cards)
#expect(cards.map(\.id.rawValue) == [Ident.card1, Ident.card2])
#expect(cards[0].isDeleted == true)
#expect(cards[0].order == 1024)
#expect(cards[1].isDeleted == false)
}
/// After restore the file carries no residue of `deleted` at all, and the item reappears
/// among its current siblings at the `order` it had all along.
@Test func deleteThenRestoreLeavesNoResidueAndReappearsAtItsRecordedOrder() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("A.kanban", Item.board)
try fixture.item("A.kanban/\(Ident.lane1)", Item.rich(order: "1024", title: "Todo"))
let cardFolder = try fixture.item(
"A.kanban/\(Ident.lane1)/\(Ident.card1)", Item.rich(order: "1536", title: "Card One")
)
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card2)", Item.rich(order: "2048", title: "Card Two"))
try BoardWriter.deleteItem(at: cardFolder)
#expect(try FrontmatterDocument.parse(fixture.indexText("A.kanban/\(Ident.lane1)/\(Ident.card1)"))
.deleted.value != nil)
try BoardWriter.restoreItem(at: cardFolder)
let after = try fixture.indexText("A.kanban/\(Ident.lane1)/\(Ident.card1)")
#expect(!after.contains("deleted"))
let document = try FrontmatterDocument.parse(after)
#expect(document.deleted == .missing)
#expect(document.order == .valid(1536))
let result = try BoardLoader.load(boardRoot: fixture.url("A.kanban"))
let cards = try #require(result.model.lanes.first?.cards)
#expect(cards.map(\.id.rawValue) == [Ident.card1, Ident.card2])
#expect(cards[0].isDeleted == false)
}
/// `remove` takes every occurrence, so a hand-duplicated `deleted` line cannot resurrect
/// the tombstone the instant the winning one is gone.
@Test func restoreRemovesAHandDuplicatedDeletedKeyEntirely() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let text = """
---
schema: 1
order: 1024
title: Twice Gone
deleted: 2026-01-01T00:00:00Z
deleted: 2026-06-01T00:00:00Z
---
body
"""
let folder = try fixture.item(Ident.lane1, text)
try BoardWriter.restoreItem(at: folder)
let after = try fixture.indexText(Ident.lane1)
#expect(after.components(separatedBy: "\n").filter { $0.hasPrefix("deleted:") }.isEmpty)
#expect(try FrontmatterDocument.parse(after).deleted == .missing)
}
/// Tombstones are inert to ordering: a sibling deleted via `deleteItem` must not factor into
/// a subsequent create's append target.
@Test func aTombstonedSiblingIsExcludedFromTheAppendRankAfterDeleteItem() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item(Child.a, "---\nschema: 1\norder: 1024\ntitle: A\n---\nbody\n")
let highOrder = try fixture.item(Child.b, "---\nschema: 1\norder: 9999\ntitle: B\n---\nbody\n")
try BoardWriter.deleteItem(at: highOrder)
let newID = try BoardWriter.createLane(inBoard: fixture.root, title: "New")
let document = try FrontmatterDocument.parse(fixture.indexText(newID.rawValue))
#expect(document.order == .valid(2048))
}
@Test func renumberLeavesATombstonedSiblingByteIdentical() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("lane/\(Child.a)", "---\nschema: 1\norder: 1024\ntitle: A\n---\nbody\n")
let toDelete = try fixture.item("lane/\(Child.b)", "---\nschema: 1\norder: 3000\ntitle: B\n---\nbody\n")
try BoardWriter.deleteItem(at: toDelete)
let tombstoneAfterDelete = try fixture.indexData("lane/\(Child.b)")
try BoardWriter.renumberVisibleChildren(of: fixture.url("lane"))
#expect(try fixture.indexData("lane/\(Child.b)") == tombstoneAfterDelete)
}
/// Board-root deletion is structurally unreachable at the writer level: a board root's
/// folder name is never UUID-shaped.
@Test func deleteRefusesANonUUIDShapedFolder() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = try fixture.item("A.kanban", Item.board)
let error = writeFailure { try BoardWriter.deleteItem(at: root) }
guard case let .unreadable(message) = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(message.contains("UUID-shaped"))
#expect(try fixture.indexText("A.kanban") == Item.board)
}
@Test func restoreRefusesANonUUIDShapedFolder() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = try fixture.item("A.kanban", Item.board)
let error = writeFailure { try BoardWriter.restoreItem(at: root) }
guard case let .unreadable(message) = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(message.contains("UUID-shaped"))
#expect(try fixture.indexText("A.kanban") == Item.board)
}
/// Comes free via `updateIndex`'s pre-flight: a readable-but-uneditable shape refuses every
/// app-mediated write, delete included.
@Test func deleteOnAnUneditableItemRefuses() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item(Ident.lane1, Fixture.flowMapping)
let error = writeFailure { try BoardWriter.deleteItem(at: folder) }
#expect(error?.reason == .uneditableFrontmatter(.keyWithoutOwnLine))
#expect(try fixture.indexText(Ident.lane1) == Fixture.flowMapping)
}
// MARK: Title enrichment (02-architecture.md § Write-failure surfacing)
/// `updateIndex`'s pre-flight read succeeds — the shape is readable, only uneditable — so by
/// the time the refusal fires, `WriteOperation.withTitle` has already run: the title survives
/// into the thrown error. `Fixture.flowMapping` above has no `title` key at all, which is why
/// this test reaches for `Item.uneditable` instead — the fixture that actually carries one.
@Test func deleteOnAnUneditableItemWithAKnownTitleCarriesItInTheOperation() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item(Ident.lane1, Item.uneditable)
let error = writeFailure { try BoardWriter.deleteItem(at: folder) }
#expect(error?.reason == .uneditableFrontmatter(.keyWithoutOwnLine))
#expect(error?.operation == .delete(title: "Odd"))
}
/// The negative case: a file that cannot even be read (invalid UTF-8) never gets far enough
/// for `readDocument` to hand back a document, so there is no title to learn — the operation
/// stays exactly as its call site constructed it, title `nil`.
@Test func deleteOnAnUnreadableIndexLeavesTheOperationsTitleNil() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let garbage = try #require("---\nschema: 1\ntitle: café\n---\nbody\n".data(using: .isoLatin1))
let folder = try fixture.item(Ident.lane1, bytes: garbage)
let error = writeFailure { try BoardWriter.deleteItem(at: folder) }
guard case .unreadable = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(error?.operation == .delete(title: nil))
}
}
// MARK: - Purge
/// `BoardWriter.purgeItem`: physical removal — Delete Immediately / Empty Trash
/// (01-storage-format.md § Deletion) — irreversible, and distinct from tombstoning. Does not
/// require the item to be tombstoned first: Delete Immediately skips that stage by design.
struct BoardWriterPurgeTests {
@Test func purgeRemovesTheFolderTreeIncludingNestedContentFromDisk() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("A.kanban", Item.board)
let laneFolder = try fixture.item("A.kanban/\(Ident.lane1)", Item.rich(order: "1024", title: "Todo"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card1)", Item.rich(order: "1024", title: "Card One"))
try BoardWriter.purgeItem(at: laneFolder)
#expect(!fixture.exists("A.kanban/\(Ident.lane1)"))
#expect(!fixture.exists("A.kanban/\(Ident.lane1)/\(Ident.card1)"))
}
/// A folder that is already gone (a Finder deletion) is success, not an error — the same
/// end state a purge would have produced.
@Test func purgeOfAnAlreadyMissingFolderSucceedsSilently() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let gone = fixture.url("A.kanban/\(Ident.lane1)")
#expect(!fixture.exists("A.kanban/\(Ident.lane1)"))
try BoardWriter.purgeItem(at: gone)
}
@Test func purgeRefusesANonUUIDShapedFolder() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = try fixture.item("A.kanban", Item.board)
let error = writeFailure { try BoardWriter.purgeItem(at: root) }
guard case let .unreadable(message) = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(message.contains("UUID-shaped"))
#expect(fixture.exists("A.kanban"))
}
@Test func purgeDoesNotRequirePriorTombstone() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let folder = try fixture.item(Ident.lane1, Item.rich(order: "1024", title: "Live"))
#expect(try FrontmatterDocument.parse(fixture.indexText(Ident.lane1)).deleted == .missing)
try BoardWriter.purgeItem(at: folder)
#expect(!fixture.exists(Ident.lane1))
}
}
// MARK: - Same-parent move degrades to a reorder
/// A move whose destination is the item's current parent is the same gesture as any other drop
/// — the writer degrades it to the bare `order` rewrite instead of leaking a `FileManager`
/// name collision, and the appended rank is computed excluding the item itself, which unlike
/// every other move is already sitting among the siblings it would otherwise count.
struct BoardWriterSameParentMoveTests {
@Test func aSameParentMoveWithNilOrderAppendsAfterTheOtherSiblings() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("A.kanban", Item.board)
try fixture.item("A.kanban/\(Ident.lane1)", Item.rich(order: "1024", title: "Lane"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card1)", Item.rich(order: "1024", title: "First"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card2)", Item.rich(order: "2048", title: "Second"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card3)", Item.rich(order: "3072", title: "Third"))
let result = try BoardWriter.moveItem(
at: fixture.url("A.kanban/\(Ident.lane1)/\(Ident.card1)"),
toParent: fixture.url("A.kanban/\(Ident.lane1)"),
sourceBoardRoot: fixture.url("A.kanban"),
destinationBoardRoot: fixture.url("A.kanban"),
order: nil
)
#expect(result.id.rawValue == Ident.card1)
#expect(result.reminted.isEmpty)
// Appended after Second (2048) and Third (3072), not after its own stale 1024 —
// and not after itself miscounted (which would give 2048... or 4096+1024).
let text = try fixture.indexText("A.kanban/\(Ident.lane1)/\(Ident.card1)")
#expect(text.contains("order: 4096"))
#expect(!text.contains("modified-by:"))
}
@Test func aSameParentMoveWithAnExplicitOrderJustRewritesIt() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
try fixture.item("A.kanban", Item.board)
try fixture.item("A.kanban/\(Ident.lane1)", Item.rich(order: "1024", title: "Lane"))
try fixture.item("A.kanban/\(Ident.lane1)/\(Ident.card1)", Item.rich(order: "3072", title: "Only"))
let laneBefore = try fixture.indexData("A.kanban/\(Ident.lane1)")
let result = try BoardWriter.moveItem(
at: fixture.url("A.kanban/\(Ident.lane1)/\(Ident.card1)"),
toParent: fixture.url("A.kanban/\(Ident.lane1)"),
sourceBoardRoot: fixture.url("A.kanban"),
destinationBoardRoot: fixture.url("A.kanban"),
order: 512
)
#expect(result.id.rawValue == Ident.card1)
#expect(try fixture.indexText("A.kanban/\(Ident.lane1)/\(Ident.card1)").contains("order: 512"))
#expect(try fixture.indexData("A.kanban/\(Ident.lane1)") == laneBefore)
#expect(try fixture.entryNames("A.kanban/\(Ident.lane1)").contains(Ident.card1))
}
}
// MARK: - Import attachments
/// `BoardWriter.importAttachments`: the write side of 01-storage-format.md § Attachments —
/// never refuses a drop, auto-renames Finder-style on collision, and stops a multi-file batch
/// at the first failure without undoing what already landed.
struct BoardWriterImportAttachmentsTests {
/// A bare UUID-shaped card folder — `importAttachments` never reads its `index.md`, so a
/// minimal one (like every other card these suites mint) is as good a target as a fully
/// loaded one.
private func card(_ fixture: WriterFixture) throws -> URL {
try fixture.item(Ident.card1, Item.rich(order: "1024", title: "Card"))
}
@Test func firstImportCreatesAttachmentsAndLandsTheOriginalName() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let card = try card(fixture)
let bytes = Data([0x89, 0x50, 0x4E, 0x47, 0x00, 0xFF])
let source = try fixture.file("sources/shot.png", bytes)
let landed = try BoardWriter.importAttachments([source], intoCard: card)
#expect(landed == [ImportedAttachment(sourceURL: source, fileName: "shot.png")])
#expect(try fixture.data("\(Ident.card1)/attachments/shot.png") == bytes)
// The source is a copy's origin, never its casualty.
#expect(try fixture.data("sources/shot.png") == bytes)
}
/// Three separate drops of a file named `shot.png`: never overwritten, never refused — each
/// lands under the next free Finder-style name, and all three coexist afterwards.
@Test func collidingImportsAutoRenameFinderStyle() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let card = try card(fixture)
let first = try fixture.file("sources/1/shot.png", Data([0x01]))
let second = try fixture.file("sources/2/shot.png", Data([0x02]))
let third = try fixture.file("sources/3/shot.png", Data([0x03]))
let landed1 = try BoardWriter.importAttachments([first], intoCard: card)
let landed2 = try BoardWriter.importAttachments([second], intoCard: card)
let landed3 = try BoardWriter.importAttachments([third], intoCard: card)
#expect(landed1.map(\.fileName) == ["shot.png"])
#expect(landed2.map(\.fileName) == ["shot 2.png"])
#expect(landed3.map(\.fileName) == ["shot 3.png"])
#expect(try fixture.entryNames("\(Ident.card1)/attachments") == ["shot 2.png", "shot 3.png", "shot.png"])
#expect(try fixture.data("\(Ident.card1)/attachments/shot.png") == Data([0x01]))
#expect(try fixture.data("\(Ident.card1)/attachments/shot 2.png") == Data([0x02]))
#expect(try fixture.data("\(Ident.card1)/attachments/shot 3.png") == Data([0x03]))
}
/// A name with no extension at all suffixes directly — `"notes"` → `"notes 2"`, not
/// `"notes 2."` or some other extension-shaped artifact.
@Test func anExtensionLessCollisionRenamesToNotes2() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let card = try card(fixture)
let first = try fixture.file("sources/1/notes", Data("first".utf8))
let second = try fixture.file("sources/2/notes", Data("second".utf8))
_ = try BoardWriter.importAttachments([first], intoCard: card)
let landed = try BoardWriter.importAttachments([second], intoCard: card)
#expect(landed.map(\.fileName) == ["notes 2"])
#expect(try fixture.entryNames("\(Ident.card1)/attachments") == ["notes", "notes 2"])
}
/// `fileExists` is true for a directory as much as a file: a subfolder that happens to share
/// the incoming name blocks it exactly like a file would, and is never touched by the import.
@Test func aFileNamedLikeAnExistingSubfolderAlsoRenames() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let card = try card(fixture)
try fixture.file("\(Ident.card1)/attachments/shot.png/inner.txt", Data("hand-made".utf8))
let source = try fixture.file("sources/shot.png", Data([0x09]))
let landed = try BoardWriter.importAttachments([source], intoCard: card)
#expect(landed.map(\.fileName) == ["shot 2.png"])
#expect(try fixture.data("\(Ident.card1)/attachments/shot 2.png") == Data([0x09]))
#expect(try fixture.entryNames("\(Ident.card1)/attachments/shot.png") == ["inner.txt"])
}
/// One call, three sources, two of which collide with what is already there and with each
/// other in turn — the returned names track input order, not landing order.
@Test func multiFileImportInOneCallReturnsLandedNamesInInputOrder() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let card = try card(fixture)
try fixture.file("\(Ident.card1)/attachments/shot.png", Data([0x00]))
let shot = try fixture.file("sources/1/shot.png", Data([0x01]))
let notes = try fixture.file("sources/2/notes.txt", Data([0x02]))
let shotAgain = try fixture.file("sources/3/shot.png", Data([0x03]))
let landed = try BoardWriter.importAttachments([shot, notes, shotAgain], intoCard: card)
#expect(landed.map(\.fileName) == ["shot 2.png", "notes.txt", "shot 3.png"])
#expect(landed.map(\.sourceURL) == [shot, notes, shotAgain])
#expect(try fixture.entryNames("\(Ident.card1)/attachments")
== ["notes.txt", "shot 2.png", "shot 3.png", "shot.png"])
}
/// Refused before any copy for that file: the failing source is named, nothing of its lands,
/// and — because each import is its own completed write — the file that landed *before* it
/// in the same batch stays landed rather than being rolled back.
@Test func anUnreadableSourceRefusesNamingItAndStopsTheBatch() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let card = try card(fixture)
let first = try fixture.file("sources/shot.png", Data([0x01]))
let missing = fixture.url("sources").appendingPathComponent("missing.png")
let third = try fixture.file("sources/third.png", Data([0x03]))
let error = writeFailure {
_ = try BoardWriter.importAttachments([first, missing, third], intoCard: card)
}
guard case .unreadable = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(error?.path == missing.path)
#expect(error?.operation == .importAttachment(filename: "missing.png"))
#expect(try fixture.entryNames("\(Ident.card1)/attachments") == ["shot.png"])
}
/// Attachments belong to cards: the shape guard `deleteItem`/`restoreItem`/`purgeItem` share
/// refuses a board root (or any non-UUID-shaped folder) before `attachments/` is even
/// considered.
@Test func importIntoANonUUIDShapedFolderIsRefused() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let root = try fixture.item("A.kanban", Item.board)
let source = try fixture.file("sources/shot.png", Data([0x01]))
let error = writeFailure {
_ = try BoardWriter.importAttachments([source], intoCard: root)
}
guard case let .unreadable(message) = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
#expect(message.contains("UUID-shaped"))
#expect(!fixture.exists("A.kanban/attachments"))
}
/// "Never refuses the drop" is policy, not an I/O guarantee: a copy that genuinely cannot
/// land — `attachments/` made unwritable here, standing in for a full disk or a permissions
/// error — surfaces as `.io` naming the source file, and no partial file is left behind.
@Test func aFailedCopyLeavesNoPartialAttachment() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let card = try card(fixture)
let existing = try fixture.file("sources/existing.png", Data([0x00]))
_ = try BoardWriter.importAttachments([existing], intoCard: card)
let attachmentsFolder = fixture.url(Ident.card1).appendingPathComponent("attachments")
try FileManager.default.setAttributes([.posixPermissions: 0o555], ofItemAtPath: attachmentsFolder.path)
let source = try fixture.file("sources/shot.png", Data([0x01]))
let error = writeFailure {
_ = try BoardWriter.importAttachments([source], intoCard: card)
}
guard case .io = error?.reason else {
Issue.record("expected .io, got \(String(describing: error?.reason))")
return
}
#expect(error?.path == source.path)
#expect(try fixture.entryNames("\(Ident.card1)/attachments") == ["existing.png"])
}
}
// MARK: - List attachments
/// `BoardWriter.listAttachments`: the flat, top-level-files-only read (01-storage-format.md §
/// Attachments) that never writes anything, not even `attachments/` itself.
struct BoardWriterListAttachmentsTests {
private func card(_ fixture: WriterFixture) throws -> URL {
try fixture.item(Ident.card1, Item.rich(order: "1024", title: "Card"))
}
/// Subfolders and hidden files never surface, and survive both the import and the listing
/// untouched; the sort is Finder's numeric order, not plain string order (`"shot 2.png"`
/// before `"shot 10.png"`, which a byte-wise sort would put the other way).
@Test func listingIsFlatExcludesHiddenFilesAndSortsFinderStyle() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let card = try card(fixture)
let shot2 = try fixture.file("sources/1/shot 2.png", Data([0x01]))
let shot10 = try fixture.file("sources/2/shot 10.png", Data([0x02]))
_ = try BoardWriter.importAttachments([shot2, shot10], intoCard: card)
try fixture.file("\(Ident.card1)/attachments/sub/inside.txt", Data("hand-made".utf8))
try fixture.file("\(Ident.card1)/attachments/.DS_Store", Data("hidden".utf8))
let listing = try BoardWriter.listAttachments(ofCard: card)
#expect(listing == ["shot 2.png", "shot 10.png"])
#expect(try fixture.entryNames("\(Ident.card1)/attachments/sub") == ["inside.txt"])
#expect(fixture.exists("\(Ident.card1)/attachments/.DS_Store"))
}
/// Nothing imported yet is an ordinary state, not an error — `attachments/` need not exist
/// for a card to list cleanly as empty.
@Test func aMissingAttachmentsFolderListsAsEmpty() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let card = try card(fixture)
#expect(try BoardWriter.listAttachments(ofCard: card) == [])
#expect(!fixture.exists("\(Ident.card1)/attachments"))
}
/// Unlike a missing `attachments/`, a missing *card* is a loud error — the caller asked
/// about something that is not there.
@Test func aMissingCardFolderIsALoudUnreadableError() throws {
let fixture = try WriterFixture()
defer { fixture.tearDown() }
let missing = fixture.url(Ident.card1)
let error = writeFailure { _ = try BoardWriter.listAttachments(ofCard: missing) }
guard case .unreadable = error?.reason else {
Issue.record("expected .unreadable, got \(String(describing: error?.reason))")
return
}
}
}
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