d8496498ea
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>
90 lines
2.6 KiB
TypeScript
90 lines
2.6 KiB
TypeScript
import { describe, it, expect, vi } from 'vitest';
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import { createPdfRenderer } from './usePdfRenderer.svelte';
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// Note: init() and loadDocument() require pdfjsLib (browser module).
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// These tests cover pure state logic only — bounds clamping and zoom limits.
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describe('createPdfRenderer', () => {
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it('starts at page 1 with scale 1.5 and no error', () => {
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const r = createPdfRenderer();
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expect(r.currentPage).toBe(1);
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expect(r.scale).toBe(1.5);
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expect(r.totalPages).toBe(0);
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expect(r.loading).toBe(false);
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expect(r.error).toBeNull();
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expect(r.isLoaded).toBe(false);
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expect(r.pdfjsReady).toBe(false);
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});
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it('prevPage does not go below page 1', () => {
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const r = createPdfRenderer();
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r.prevPage();
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expect(r.currentPage).toBe(1);
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});
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it('nextPage does not exceed totalPages', () => {
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const r = createPdfRenderer();
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// totalPages = 0, so 1 < 0 is false → stays at 1
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r.nextPage();
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expect(r.currentPage).toBe(1);
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});
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it('goToPage does not navigate when n > totalPages', () => {
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const r = createPdfRenderer();
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r.goToPage(5);
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expect(r.currentPage).toBe(1);
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});
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it('goToPage does not navigate when n < 1', () => {
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const r = createPdfRenderer();
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r.goToPage(0);
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expect(r.currentPage).toBe(1);
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});
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it('zoomIn increases scale by 0.25', () => {
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const r = createPdfRenderer();
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r.zoomIn();
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expect(r.scale).toBeCloseTo(1.75);
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});
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it('zoomOut decreases scale by 0.25', () => {
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const r = createPdfRenderer();
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r.zoomOut();
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expect(r.scale).toBeCloseTo(1.25);
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});
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it('zoomOut does not go below 0.5', () => {
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const r = createPdfRenderer();
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for (let i = 0; i < 20; i++) r.zoomOut();
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expect(r.scale).toBeCloseTo(0.5);
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});
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it('loadDocument is a no-op when pdfjsLib not initialized', async () => {
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const r = createPdfRenderer();
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await r.loadDocument('/some/path');
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// No-op because pdfjsLib is null (init not called)
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expect(r.error).toBeNull();
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expect(r.loading).toBe(false);
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});
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it('calls injected libLoader during init and sets pdfjsReady', async () => {
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const fakePdfjs = {
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GlobalWorkerOptions: { workerSrc: '' },
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getDocument: vi.fn(),
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TextLayer: class {}
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} as unknown as typeof import('pdfjs-dist');
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const fakeLoader = vi.fn().mockResolvedValue([fakePdfjs, { default: '' }] as const);
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const r = createPdfRenderer(fakeLoader);
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await r.init();
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expect(fakeLoader).toHaveBeenCalledOnce();
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expect(r.pdfjsReady).toBe(true);
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});
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it('leaves pdfjsReady false when libLoader rejects', async () => {
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const failingLoader = vi.fn().mockRejectedValue(new Error('load failed'));
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const r = createPdfRenderer(failingLoader);
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await r.init().catch(() => {});
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expect(r.pdfjsReady).toBe(false);
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});
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});
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