test: increase strategic coverage

src/utils/noteOpenPerformance.extra.test.ts

@@ -0,0 +1,63 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import {
+  beginNoteOpenTrace,
+  failNoteOpenTrace,
+  finishNoteOpenTrace,
+  logKeyboardNavigationTrace,
+  markNoteOpenTrace,
+} from './noteOpenPerformance'
+
+const VITEST_WORKER_DESCRIPTOR = Object.getOwnPropertyDescriptor(globalThis, '__vitest_worker__')
+
+describe('noteOpenPerformance additional coverage', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    if (VITEST_WORKER_DESCRIPTOR) {
+      Reflect.deleteProperty(globalThis, '__vitest_worker__')
+    }
+  })
+
+  afterEach(() => {
+    if (VITEST_WORKER_DESCRIPTOR) {
+      Object.defineProperty(globalThis, '__vitest_worker__', VITEST_WORKER_DESCRIPTOR)
+    }
+  })
+
+  it('logs n/a durations and cache misses when optional marks are absent', () => {
+    const debugSpy = vi.spyOn(console, 'debug').mockImplementation(() => {})
+    vi.spyOn(performance, 'now')
+      .mockReturnValueOnce(10)
+      .mockReturnValueOnce(35)
+
+    beginNoteOpenTrace('/vault/missing-stages.md', 'quick-open')
+    finishNoteOpenTrace('/vault/missing-stages.md')
+
+    expect(debugSpy).toHaveBeenCalledWith(
+      '[perf] noteOpen path=/vault/missing-stages.md source=quick-open total=25.0ms beforeNavigate=n/a contentLoad=n/a editorSwap=25.0ms cache=miss',
+    )
+  })
+
+  it('ignores trace updates when running under the vitest runtime flag', () => {
+    const debugSpy = vi.spyOn(console, 'debug').mockImplementation(() => {})
+    Object.defineProperty(globalThis, '__vitest_worker__', {
+      configurable: true,
+      value: 'worker-1',
+    })
+
+    beginNoteOpenTrace('/vault/ignored.md', 'sidebar')
+    markNoteOpenTrace('/vault/ignored.md', 'cacheReady')
+    failNoteOpenTrace('/vault/ignored.md', 'ignored')
+    finishNoteOpenTrace('/vault/ignored.md')
+    logKeyboardNavigationTrace('down', 999, 12)
+
+    expect(debugSpy).not.toHaveBeenCalled()
+  })
+
+  it('does not log quiet keyboard traces when both thresholds stay below the cutoff', () => {
+    const debugSpy = vi.spyOn(console, 'debug').mockImplementation(() => {})
+
+    logKeyboardNavigationTrace('down', 499, 3.9)
+
+    expect(debugSpy).not.toHaveBeenCalled()
+  })
+})