Adds idempotency test: calling init() twice must invoke libLoader only once.
Adds `if (pdfjsReady) return;` guard to satisfy the contract.
Addresses Felix Brandt round-4 suggestion on PR #536.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
.catch(()=>{}) swallowed the rejection, so the test passed vacuously even
if a future refactor silently caught the error. rejects.toThrow() proves
the propagation contract holds before asserting pdfjsReady stays false.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Regression-protection test: init() propagates the loader rejection
before pdfjsReady is set, so the renderer stays in a safe unready state.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds an optional LibLoader parameter (defaults to the real pdfjs-dist dynamic
imports) and a failing test that verified the loader is called during init().
This is the first step toward removing ManualMockedModule registrations that
race with vitest-browser-playwright's birpc teardown (#535).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
renderCurrentPage early-returns when canvasEl/textLayerEl null,
init() idempotent on second call, zoomIn after floor, goToPage(1)
no-op.
5 new tests covering ~6 branches.
Refs #496.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>