In jsdom, source modules resolve bare 'URL' identifiers through
window.URL (the jsdom window object), not through globalThis.URL (Node's
URL class). On GitHub Actions these are distinct objects, so all prior
attempts (Object.defineProperty, direct assignment, vi.stubGlobal) were
patching the wrong object and failing silently.
Changes:
- setup.ts: Object.defineProperty targets window.URL so the vi.fn mock
is visible to authUrl.ts at call time
- authUrl.test.ts: drop vi.stubGlobal approach; add vi.clearAllMocks()
to reset accumulated call counts on the setup.ts vi.fn between tests;
fix vi.spyOn target to window.URL in test 012
Direct property assignment and Object.defineProperty both fail
silently on CI when jsdom marks URL.createObjectURL as non-writable
and non-configurable. vi.stubGlobal('URL', ...) replaces globalThis.URL
entirely — which always succeeds — while extending the real URL class
so all URL parsing behaviour is preserved. vi.unstubAllGlobals() is
called at the start of beforeEach to reset cleanly between tests.
Two root causes:
1. authUrl.test.ts (007, 011, 012): Object.defineProperty in setup.ts
fails silently on CI when jsdom's URL.createObjectURL is
non-configurable. vi.restoreAllMocks() in beforeEach then restores
the property to jsdom's native implementation (returns '').
Fix: assign URL.createObjectURL = vi.fn(() => 'blob:mock') directly
in authUrl.test.ts's beforeEach, after restoreAllMocks(), so every
test in the file gets a fresh, reliable mock. Remove the now-
unnecessary mockClear() from test 012.
2. client.test.ts (013): MSW patches the global Response constructor and
calls blob.stream() on the body — a method not implemented by jsdom's
Blob. Fix: replace new Response(blob) with a plain-object duck-type
({ ok: true, blob: () => Promise.resolve(blob) }) to bypass the
patched constructor entirely.
Three interrelated issues caused 4 tests to pass locally but fail on CI:
1. setup.ts only applied the URL.createObjectURL stub when it was
undefined, but jsdom already defines it (returning ''). Changed to
always override with configurable:true so the predictable 'blob:mock'
value is set in every environment.
2. FE-API-013 used Object.defineProperty (non-configurable in jsdom) and
MSW to handle a native fetch call. Replaced with vi.spyOn for both
URL.createObjectURL/revokeObjectURL and a direct fetch mock, which is
more reliable across environments.
3. FE-COMP-AUTHURL-012's vi.spyOn(URL, 'createObjectURL') returned the
same vi.fn() instance set in setup.ts, accumulating calls from all
prior tests in the file (1+8+7+6=22 instead of 6). Added mockClear()
immediately after the spy setup to reset the count.
jubnl