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path: root/SoraTests/SettingsManagerSyncTests.swift
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import XCTest

final class SettingsManagerSyncTests: XCTestCase {
  func testBookmarkMutationPathReusesEncodedPayload() throws {
    let source = try loadSource(at: "Sora/Data/Settings/SettingsManager.swift")
    let addBookmarkSection = try extractFunction(
      named: "func addBookmark(provider: BooruProvider, tags: [String], folder: UUID? = nil)",
      from: source
    )
    let updateBookmarksSection = try extractFunction(named: "func updateBookmarks(", from: source)
    let bookmarksSetterSection = try extractFunction(named: "var bookmarks: [SettingsBookmark]", from: source)
    let normalizedAddBookmark = strippingCommentsAndStrings(from: addBookmarkSection)
    let normalizedUpdateBookmarks = strippingCommentsAndStrings(from: updateBookmarksSection)
    let normalizedBookmarksSetter = strippingCommentsAndStrings(from: bookmarksSetterSection)

    let addBookmarkInlineEncodeCount = tokenCount(
      matching: #"Self\s*\.\s*encode\s*\(\s*updatedBookmarks\s*\)"#,
      in: normalizedAddBookmark
    )
    let updateBookmarksPreEncodedForwardCount = tokenCount(
      matching: #"syncableData\s*\([\s\S]*?\bencodedData\s*:"#,
      in: normalizedUpdateBookmarks
    )
    let bookmarksSetterPreEncodedForwardCount = tokenCount(
      matching: #"syncableData\s*\([\s\S]*?\bencodedData\s*:"#,
      in: normalizedBookmarksSetter
    )

    // swiftlint:disable:next prefer_nimble
    XCTAssertEqual(
      addBookmarkInlineEncodeCount,
      0,
      "addBookmark should not pre-encode and then trigger another encode downstream."
    )
    // swiftlint:disable:next prefer_nimble
    XCTAssertGreaterThan(
      updateBookmarksPreEncodedForwardCount,
      0,
      "updateBookmarks should forward a pre-encoded payload to syncableData to avoid duplicate encoding."
    )
    // swiftlint:disable:next prefer_nimble
    XCTAssertGreaterThan(
      bookmarksSetterPreEncodedForwardCount,
      0,
      "bookmarks setter should forward a pre-encoded payload to syncableData."
    )
  }

  func testFavoriteMutationPathReusesEncodedPayload() throws {
    let source = try loadSource(at: "Sora/Data/Settings/SettingsManager.swift")
    let addFavoriteSection = try extractFunction(
      named: "func addFavorite(post: BooruPost, provider: BooruProvider, folder: UUID? = nil)",
      from: source
    )
    let updateFavoritesSection = try extractFunction(named: "func updateFavorites(", from: source)
    let favoritesSetterSection = try extractFunction(named: "var favorites: [SettingsFavoritePost]", from: source)
    let normalizedAddFavorite = strippingCommentsAndStrings(from: addFavoriteSection)
    let normalizedUpdateFavorites = strippingCommentsAndStrings(from: updateFavoritesSection)
    let normalizedFavoritesSetter = strippingCommentsAndStrings(from: favoritesSetterSection)

    let addFavoriteInlineEncodeCount = tokenCount(
      matching: #"Self\s*\.\s*encode\s*\(\s*updatedFavorites\s*\)"#,
      in: normalizedAddFavorite
    )
    let updateFavoritesPreEncodedForwardCount = tokenCount(
      matching: #"syncableData\s*\([\s\S]*?\bencodedData\s*:"#,
      in: normalizedUpdateFavorites
    )
    let favoritesSetterPreEncodedForwardCount = tokenCount(
      matching: #"syncableData\s*\([\s\S]*?\bencodedData\s*:"#,
      in: normalizedFavoritesSetter
    )

    // swiftlint:disable:next prefer_nimble
    XCTAssertEqual(
      addFavoriteInlineEncodeCount,
      0,
      "addFavorite should not pre-encode and then trigger another encode downstream."
    )
    // swiftlint:disable:next prefer_nimble
    XCTAssertGreaterThan(
      updateFavoritesPreEncodedForwardCount,
      0,
      "updateFavorites should forward a pre-encoded payload to syncableData to avoid duplicate encoding."
    )
    // swiftlint:disable:next prefer_nimble
    XCTAssertGreaterThan(
      favoritesSetterPreEncodedForwardCount,
      0,
      "favorites setter should forward a pre-encoded payload to syncableData."
    )
  }

  func testBatchedSyncPathGuardsUnchangedPayloadWrites() throws {
    let source = try loadSource(at: "Sora/Data/Settings/SettingsManager.swift")
    let triggerSyncSection = try extractFunction(
      named: "private func triggerSyncIfNeeded(for key: SettingsSyncKey)",
      from: source
    )
    let normalizedSection = strippingCommentsAndStrings(from: triggerSyncSection)

    let cloudWriteCount = tokenCount(
      matching: #"\bNSUbiquitousKeyValueStore\s*\.\s*default\s*\.\s*set\s*\(\s*encoded\s*,\s*forKey\s*:"#,
      in: normalizedSection
    )
    let unchangedGuardCount = tokenCount(
      matching: #"\!\=\s*encoded\b"#,
      in: normalizedSection
    )

    // swiftlint:disable:next prefer_nimble
    XCTAssertGreaterThan(cloudWriteCount, 0, "Expected batched sync path to contain cloud writes.")
    // swiftlint:disable:next prefer_nimble
    XCTAssertGreaterThanOrEqual(
      unchangedGuardCount,
      cloudWriteCount,
      "Every batched iCloud write should be guarded to avoid unchanged payload rewrites."
    )
  }

  func testBatchedSyncUsesCoordinatorQueue() throws {
    let source = try loadSource(at: "Sora/Data/Settings/SettingsManager.swift")
    let triggerBatchSection = try extractFunction(
      named: "private func triggerBatchedSync()",
      from: source
    )
    let normalizedSection = strippingCommentsAndStrings(from: triggerBatchSection)

    let coordinatorEnqueueCount = tokenCount(
      matching: #"\bsyncCoordinator\s*\.\s*enqueue\s*\("#,
      in: normalizedSection
    )
    let detachedCount = tokenCount(
      matching: #"\bTask\s*\.\s*detached\b"#,
      in: normalizedSection
    )

    // swiftlint:disable:next prefer_nimble
    XCTAssertGreaterThan(
      coordinatorEnqueueCount,
      0,
      "Batched sync should enqueue through a single sync coordinator."
    )
    // swiftlint:disable:next prefer_nimble
    XCTAssertEqual(
      detachedCount,
      0,
      "Batched sync should not launch detached tasks directly."
    )
  }

  func testPerKeySyncPathAvoidsDetachedFanOut() throws {
    let source = try loadSource(at: "Sora/Data/Settings/SettingsManager.swift")
    let triggerSyncSection = try extractFunction(
      named: "private func triggerSyncIfNeeded(for key: SettingsSyncKey)",
      from: source
    )
    let normalizedSection = strippingCommentsAndStrings(from: triggerSyncSection)

    let detachedCount = tokenCount(
      matching: #"\bTask\s*\.\s*detached\b"#,
      in: normalizedSection
    )

    // swiftlint:disable:next prefer_nimble
    XCTAssertEqual(
      detachedCount,
      0,
      "Per-key sync should run on the coordinator path without detached fan-out."
    )
  }

  func testManualFullSyncAggregatesChangeNotification() throws {
    let source = try loadSource(at: "Sora/Data/Settings/SettingsManager.swift")
    let fullSyncSection = try extractFunction(
      named: "func triggerSyncIfNeededForAll()",
      from: source
    )
    let normalizedSection = strippingCommentsAndStrings(from: fullSyncSection)

    let bookmarksKeyCount = tokenCount(matching: #"\.bookmarks\b"#, in: normalizedSection)
    let favoritesKeyCount = tokenCount(matching: #"\.favorites\b"#, in: normalizedSection)
    let searchHistoryKeyCount = tokenCount(matching: #"\.searchHistory\b"#, in: normalizedSection)
    let customProvidersKeyCount = tokenCount(matching: #"\.customProviders\b"#, in: normalizedSection)
    let objectWillChangeCount = tokenCount(
      matching: #"\bobjectWillChange\s*\.\s*send\s*\("#,
      in: normalizedSection
    )

    // swiftlint:disable:next prefer_nimble
    XCTAssertEqual(
      bookmarksKeyCount + favoritesKeyCount + searchHistoryKeyCount + customProvidersKeyCount,
      4,
      "Full sync should evaluate all supported sync keys."
    )
    // swiftlint:disable:next prefer_nimble
    XCTAssertGreaterThan(
      objectWillChangeCount,
      0,
      "Full sync should emit a consolidated objectWillChange notification when merged state changes."
    )
  }
}