fix(jellyfin): respect Windows mpv configuration when casting (#267)

src/main/runtime/mpv-process.test.ts

@@ -0,0 +1,39 @@
+import assert from 'node:assert/strict';
+import { once } from 'node:events';
+import test from 'node:test';
+import { resolveMpvExecutablePath, spawnMpvProcess } from './mpv-process';
+
+const testWindows = process.platform === 'win32' ? test : test.skip;
+
+test('mpv process launcher forwards arguments and environment to the child', async () => {
+  const child = spawnMpvProcess(
+    process.execPath,
+    ['-e', 'process.exit(Number(process.env.SUBMINER_TEST_EXIT))'],
+    { ...process.env, DISPLAY: '', SUBMINER_TEST_EXIT: '17' },
+  );
+  try {
+    const [code] = await once(child, 'exit');
+    assert.equal(code, 17);
+  } finally {
+    if (child.exitCode === null) child.kill();
+  }
+});
+
+testWindows('managed Windows playback launches the configured executable', async () => {
+  const executable = resolveMpvExecutablePath(`  ${process.execPath}  `);
+  const child = spawnMpvProcess(executable, ['-e', 'process.exit(17)']);
+  try {
+    assert.equal(child.spawnfile, process.execPath);
+    const [code] = await once(child, 'exit');
+    assert.equal(code, 17);
+  } finally {
+    if (child.exitCode === null) child.kill();
+  }
+});
+
+testWindows('managed Windows playback rejects an invalid configured executable', () => {
+  assert.throws(
+    () => resolveMpvExecutablePath(`${process.execPath}/missing-mpv.exe`),
+    /Could not find mpv.exe/,
+  );
+});