Add tests for API endpoints, liked store, listen tracker and paged list

web-player/src/routes/api/tracks/server.test.ts

@@ -0,0 +1,42 @@
+import { describe, expect, it, vi } from 'vitest';
+import { EXPLORE_PAGE_SIZE, MAX_PAGE_SIZE } from '$lib/config';
+
+vi.mock('$lib/server/config', () => ({ apiConfig: { baseUrl: 'http://api.test' } }));
+
+import { GET } from './+server';
+
+type GetEvent = Parameters<typeof GET>[0];
+
+async function requestedQuery(search: string) {
+	const fetchFn = vi
+		.fn()
+		.mockResolvedValue(
+			Response.json({ items: [], pageNumber: 1, hasNextPage: false, totalItemCount: 0 })
+		);
+	const res = await GET({
+		url: new URL(`http://x/api/tracks${search}`),
+		locals: { accessToken: null, user: null },
+		fetch: fetchFn
+	} as unknown as GetEvent);
+	expect(res.status).toBe(200);
+	const request = fetchFn.mock.calls[0][0] as Request;
+	return new URL(request.url).searchParams;
+}
+
+describe('GET /api/tracks', () => {
+	it('caps pageSize at MAX_PAGE_SIZE', async () => {
+		const query = await requestedQuery('?pageSize=100000');
+		expect(query.get('pageSize')).toBe(String(MAX_PAGE_SIZE));
+	});
+
+	it('uses the default page size for invalid values', async () => {
+		expect((await requestedQuery('?pageSize=abc')).get('pageSize')).toBe(String(EXPLORE_PAGE_SIZE));
+		expect((await requestedQuery('')).get('pageSize')).toBe(String(EXPLORE_PAGE_SIZE));
+	});
+
+	it('resets an invalid pageNumber to 1', async () => {
+		expect((await requestedQuery('?pageNumber=-3')).get('pageNumber')).toBe('1');
+		expect((await requestedQuery('?pageNumber=abc')).get('pageNumber')).toBe('1');
+		expect((await requestedQuery('?pageNumber=4')).get('pageNumber')).toBe('4');
+	});
+});