[codex] Make Windows mpv shortcut self-contained (#40)

src/main/runtime/local-subtitle-selection.test.ts

@@ -0,0 +1,77 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import {
+  createManagedLocalSubtitleSelectionRuntime,
+  resolveManagedLocalSubtitleSelection,
+} from './local-subtitle-selection';
+
+const mixedLanguageTrackList = [
+  { type: 'sub', id: 1, lang: 'pt', title: '[Infinite]', external: false, selected: true },
+  { type: 'sub', id: 2, lang: 'pt', title: '[Moshi Moshi]', external: false },
+  { type: 'sub', id: 3, lang: 'en', title: '(Vivid)', external: false },
+  { type: 'sub', id: 9, lang: 'en', title: 'English(US)', external: false },
+  { type: 'sub', id: 11, lang: 'en', title: 'en.srt', external: true },
+  { type: 'sub', id: 12, lang: 'ja', title: 'ja.srt', external: true },
+];
+
+test('resolveManagedLocalSubtitleSelection prefers default Japanese primary and English secondary tracks', () => {
+  const result = resolveManagedLocalSubtitleSelection({
+    trackList: mixedLanguageTrackList,
+    primaryLanguages: [],
+    secondaryLanguages: [],
+  });
+
+  assert.equal(result.primaryTrackId, 12);
+  assert.equal(result.secondaryTrackId, 11);
+});
+
+test('resolveManagedLocalSubtitleSelection respects configured language overrides', () => {
+  const result = resolveManagedLocalSubtitleSelection({
+    trackList: mixedLanguageTrackList,
+    primaryLanguages: ['pt'],
+    secondaryLanguages: ['ja'],
+  });
+
+  assert.equal(result.primaryTrackId, 1);
+  assert.equal(result.secondaryTrackId, 12);
+});
+
+test('managed local subtitle selection runtime applies preferred tracks once for a local media path', async () => {
+  const commands: Array<Array<string | number>> = [];
+  const scheduled: Array<() => void> = [];
+
+  const runtime = createManagedLocalSubtitleSelectionRuntime({
+    getCurrentMediaPath: () => '/videos/example.mkv',
+    getMpvClient: () =>
+      ({
+        connected: true,
+        requestProperty: async (name: string) => {
+          if (name === 'track-list') {
+            return mixedLanguageTrackList;
+          }
+          throw new Error(`Unexpected property: ${name}`);
+        },
+      }) as never,
+    getPrimarySubtitleLanguages: () => [],
+    getSecondarySubtitleLanguages: () => [],
+    sendMpvCommand: (command) => {
+      commands.push(command);
+    },
+    schedule: (callback) => {
+      scheduled.push(callback);
+      return 1 as never;
+    },
+    clearScheduled: () => {},
+  });
+
+  runtime.handleMediaPathChange('/videos/example.mkv');
+  scheduled.shift()?.();
+  await new Promise((resolve) => setTimeout(resolve, 0));
+  runtime.handleSubtitleTrackListChange(mixedLanguageTrackList);
+
+  assert.deepEqual(commands, [
+    ['set_property', 'sid', 12],
+    ['set_property', 'secondary-sid', 11],
+  ]);
+});