native macOS codings agent orchestrator prowl.onev.cat
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Swift
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@testable import Prowl
/// Fingerprint matching re-reads the same transcript tails every time a pane's/// session cache expires. `TranscriptFragmentCache` replays the parsed result/// for unchanged files; these tests pin both the reuse and the bounding.struct TranscriptFragmentCacheTests { private func key(_ path: String, _ secondsSinceEpoch: TimeInterval) -> TranscriptFragmentCache.Key { TranscriptFragmentCache.Key(path: path, modifiedAt: Date(timeIntervalSince1970: secondsSinceEpoch)) }
@Test func reusesFragmentsForAnUnchangedFile() { var cache = TranscriptFragmentCache() var loads = 0 let target = key("/tmp/a.jsonl", 100)
let first = cache.fragments(for: target) { loads += 1 return [.init(text: "parsed fragment")] } let second = cache.fragments(for: target) { loads += 1 return [.init(text: "should not be reached")] }
#expect(loads == 1) #expect(first?.map(\.text) == ["parsed fragment"]) #expect(second?.map(\.text) == ["parsed fragment"]) }
@Test func reloadsWhenTheFileIsAppendedTo() { var cache = TranscriptFragmentCache() var loads = 0
_ = cache.fragments(for: key("/tmp/a.jsonl", 100)) { loads += 1 return [.init(text: "old")] } let updated = cache.fragments(for: key("/tmp/a.jsonl", 101)) { loads += 1 return [.init(text: "new")] }
#expect(loads == 2) #expect(updated?.map(\.text) == ["new"]) }
@Test func doesNotCacheAnUnreadableTail() { var cache = TranscriptFragmentCache() var loads = 0 let target = key("/tmp/gone.jsonl", 100)
let missing = cache.fragments(for: target) { loads += 1 return nil } let recovered = cache.fragments(for: target) { loads += 1 return [.init(text: "now readable")] }
// Caching the failure would keep a briefly unreadable transcript excluded // from every later match. #expect(loads == 2) #expect(missing == nil) #expect(recovered?.map(\.text) == ["now readable"]) }
@Test func replacesAnOlderVersionOfTheSamePathImmediately() { var cache = TranscriptFragmentCache() _ = cache.fragments(for: key("/tmp/busy.jsonl", 100)) { [.init(text: "v1")] } _ = cache.fragments(for: key("/tmp/busy.jsonl", 101)) { [.init(text: "v2")] }
#expect(cache.count == 1) }
@Test func dropsAnOlderVersionWhenLoadingTheNewVersionFails() { var cache = TranscriptFragmentCache() _ = cache.fragments(for: key("/tmp/busy.jsonl", 100)) { [.init(text: "v1")] }
#expect(cache.fragments(for: key("/tmp/busy.jsonl", 101)) { nil } == nil) #expect(cache.count == 0) }
@Test func evictsTheLeastRecentlyUsedEntryAtCapacity() { var cache = TranscriptFragmentCache(maxEntryCount: 2, maxRetainedUTF8Bytes: .max) let first = key("/tmp/first.jsonl", 100) let second = key("/tmp/second.jsonl", 100) let third = key("/tmp/third.jsonl", 100) _ = cache.fragments(for: first) { [.init(text: "first")] } _ = cache.fragments(for: second) { [.init(text: "second")] } _ = cache.fragments(for: first) { [.init(text: "not reached")] } _ = cache.fragments(for: third) { [.init(text: "third")] }
var firstReloads = 0 _ = cache.fragments(for: first) { firstReloads += 1 return [.init(text: "first reloaded")] } var secondReloads = 0 _ = cache.fragments(for: second) { secondReloads += 1 return [.init(text: "second reloaded")] }
#expect(firstReloads == 0, "A cache hit must make the entry most recently used") #expect(secondReloads == 1, "The least recently used entry must be evicted first") }
@Test func doesNotRetainAnEntryLargerThanTheByteBudget() { var cache = TranscriptFragmentCache(maxEntryCount: 10, maxRetainedUTF8Bytes: 3) let target = key("/tmp/large.jsonl", 100) var loads = 0
for _ in 0..<2 { _ = cache.fragments(for: target) { loads += 1 return [.init(text: "four")] } }
#expect(loads == 2) #expect(cache.count == 0) }
@Test func byteBudgetEvictsTheLeastRecentlyUsedEntry() { var cache = TranscriptFragmentCache(maxEntryCount: 10, maxRetainedUTF8Bytes: 10) let first = key("a", 100) let second = key("b", 100) let third = key("c", 100) _ = cache.fragments(for: first) { [.init(text: "1234")] } _ = cache.fragments(for: second) { [.init(text: "1234")] } _ = cache.fragments(for: first) { [.init(text: "not reached")] } _ = cache.fragments(for: third) { [.init(text: "1234")] }
var firstReloads = 0 _ = cache.fragments(for: first) { firstReloads += 1 return [.init(text: "1234")] } var secondReloads = 0 _ = cache.fragments(for: second) { secondReloads += 1 return [.init(text: "1234")] }
#expect(firstReloads == 0) #expect(secondReloads == 1) }
@Test func fragmentPrecomputesCountAndOnlyASuffixWorthTesting() { let short = TranscriptFragmentCache.Fragment(text: String(repeating: "a", count: 80)) #expect(short.characterCount == 80) // At or below the window the suffix would equal the whole fragment, so the // scoring loop must not be handed a second, identical search to run. #expect(short.suffix == nil)
let long = TranscriptFragmentCache.Fragment(text: String(repeating: "b", count: 81)) #expect(long.characterCount == 81) #expect(long.suffix?.count == 80)
// `characterCount` must be the grapheme count `String.count` reports, not a // byte or scalar count, because the score derives from it. let emoji = TranscriptFragmentCache.Fragment(text: "e\u{0301}moji 👩👩👧👦 test") #expect(emoji.characterCount == emoji.text.count) }
@Test func bestMatchServesASecondCallFromTheCache() throws { let root = FileManager.default.temporaryDirectory .appending(path: "prowl-fragment-cache-\(UUID().uuidString)", directoryHint: .isDirectory) try FileManager.default.createDirectory(at: root, withIntermediateDirectories: true) defer { try? FileManager.default.removeItem(at: root) }
let firstURL = root.appending(path: "first.jsonl") let secondURL = root.appending(path: "second.jsonl") try #"{"type":"user","message":{"content":"Refactor authentication middleware without changing its API."}}"# .write(to: firstURL, atomically: true, encoding: .utf8) try #"{"type":"user","message":{"content":"Investigate the unrelated rendering regression."}}"# .write(to: secondURL, atomically: true, encoding: .utf8)
let modifiedAt = Date(timeIntervalSince1970: 1_000) let candidates = [ AgentSessionCandidate( session: AgentSession(id: "first", transcriptPath: firstURL, source: .recentFile), modifiedAt: modifiedAt ), AgentSessionCandidate( session: AgentSession(id: "second", transcriptPath: secondURL, source: .recentFile), modifiedAt: modifiedAt ), ] let activeText = "❯ Refactor authentication middleware without changing its API."
var cache = TranscriptFragmentCache() let first = AgentSessionFingerprintMatcher.bestMatch( activeText: activeText, candidates: candidates, fragments: &cache ) #expect(first?.session.id == "first")
// Deleting the transcripts makes a re-read impossible, so a second match on // the same keys can only succeed by replaying the cached fragments. try FileManager.default.removeItem(at: firstURL) try FileManager.default.removeItem(at: secondURL)
let cached = AgentSessionFingerprintMatcher.bestMatch( activeText: activeText, candidates: candidates, fragments: &cache ) #expect(cached?.session.id == "first")
// A cacheless call over the same candidates now has nothing to read, which // confirms the previous call really was served from the cache. #expect(AgentSessionFingerprintMatcher.bestMatch(activeText: activeText, candidates: candidates) == nil) }}