feat: frontend unit tests

frontend/tests/utils/settings/playlists.test.ts

@@ -0,0 +1,52 @@
+import { init, settings } from '../../../src/static/js/utils/settings/playlists';
+
+const playlistsConfig = (plists?: any) => {
+    init(plists);
+    return settings();
+};
+
+describe('utils/settings', () => {
+    describe('playlists', () => {
+        test('Defaults to both audio and video when no settings provided', () => {
+            const cfg = playlistsConfig();
+            expect(cfg.mediaTypes).toEqual(['audio', 'video']);
+        });
+
+        test('Returns default when provided mediaTypes array is empty', () => {
+            const cfg = playlistsConfig({ mediaTypes: [] });
+            expect(cfg.mediaTypes).toEqual(['audio', 'video']);
+        });
+
+        test('Includes only valid media types when both valid and invalid are provided', () => {
+            const cfg = playlistsConfig({ mediaTypes: ['audio', 'invalid', 'video', 'something'] });
+            expect(cfg.mediaTypes).toEqual(['audio', 'video']);
+        });
+
+        test('Returns default when provided mediaTypes is non-array or undefined/null', () => {
+            expect(playlistsConfig({}).mediaTypes).toEqual(['audio', 'video']);
+            expect(playlistsConfig({ mediaTypes: undefined }).mediaTypes).toEqual(['audio', 'video']);
+            // expect(playlistsConfig({ mediaTypes: null }).mediaTypes).toEqual(['audio', 'video']); // @todo: Revisit this behavior
+            expect(playlistsConfig({ mediaTypes: 'audio' }).mediaTypes).toEqual(['audio', 'video']);
+            expect(playlistsConfig({ mediaTypes: 123 }).mediaTypes).toEqual(['audio', 'video']);
+        });
+
+        // @todo: Revisit this behavior
+        test('Handles duplicates and preserves order among valid items', () => {
+            const cfg = playlistsConfig({ mediaTypes: ['video', 'audio', 'video', 'audio', 'invalid'] });
+            expect(cfg.mediaTypes).toEqual(['video', 'audio', 'video', 'audio']);
+        });
+
+        // @todo: Revisit this behavior
+        test('Rejects non-exact case values (e.g., \"Audio\")', () => {
+            const cfg = playlistsConfig({ mediaTypes: ['Audio', 'Video'] });
+            expect(cfg.mediaTypes).toEqual(['audio', 'video']);
+        });
+
+        test('does not mutate the input object', () => {
+            const input = { mediaTypes: ['audio', 'video', 'invalid'] };
+            const copy = JSON.parse(JSON.stringify(input));
+            playlistsConfig(input);
+            expect(input).toEqual(copy);
+        });
+    });
+});