refactor(test): share media audio fixture across runner tests

src/media-understanding/runner.test-utils.ts

@@ -0,0 +1,34 @@
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import type { MsgContext } from "../auto-reply/templating.js";
+import { withEnvAsync } from "../test-utils/env.js";
+import { createMediaAttachmentCache, normalizeMediaAttachments } from "./runner.js";
+
+type AudioFixtureParams = {
+  ctx: MsgContext;
+  media: ReturnType<typeof normalizeMediaAttachments>;
+  cache: ReturnType<typeof createMediaAttachmentCache>;
+};
+
+export async function withAudioFixture(
+  filePrefix: string,
+  run: (params: AudioFixtureParams) => Promise<void>,
+) {
+  const tmpPath = path.join(os.tmpdir(), `${filePrefix}-${Date.now()}.wav`);
+  await fs.writeFile(tmpPath, Buffer.from("RIFF"));
+  const ctx: MsgContext = { MediaPath: tmpPath, MediaType: "audio/wav" };
+  const media = normalizeMediaAttachments(ctx);
+  const cache = createMediaAttachmentCache(media, {
+    localPathRoots: [path.dirname(tmpPath)],
+  });
+
+  try {
+    await withEnvAsync({ PATH: "" }, async () => {
+      await run({ ctx, media, cache });
+    });
+  } finally {
+    await cache.cleanup();
+    await fs.unlink(tmpPath).catch(() => {});
+  }
+}