test: time out a job that cannot finish first instead of racing a 1ms timeout

tests/ffmpeg-core.test.js

@@ -149,8 +149,9 @@ describe(genName("setTimeout()"), () => {
   });
 
   it("should timeout", () => {
-    core.setTimeout(1); // timeout after 1ms
-    expect(core.exec("-i", "video.mp4", "video.avi")).to.equal(1);
+    core.setTimeout(50);
+    // Long enough that it cannot finish first, however fast the machine is.
+    expect(core.exec("-f", "lavfi", "-i", "testsrc=size=320x240:rate=30:duration=3600", "-f", "null", "-")).to.equal(1);
   });
 });
 

tests/ffmpeg-node.test.mjs

@@ -233,16 +233,12 @@ describe(genName("FFmpeg"), function () {
   });
 
   it("stops exec() after the given timeout", async () => {
-    await ffmpeg.writeFile(
-      "timeout.mp4",
-      b64ToUint8Array(VIDEO_1S_MP4)
-    );
+    // Long enough that it cannot finish before the timeout.
     const ret = await ffmpeg.exec(
-      ["-i", "timeout.mp4", "timeout.avi"],
-      1 // 1ms, well under the time a transcode takes
+      ["-f", "lavfi", "-i", "testsrc=size=320x240:rate=30:duration=3600", "-f", "null", "-"],
+      50
     );
     expect(ret).to.equal(1);
-    await ffmpeg.deleteFile("timeout.mp4");
   });
 });
 

tests/ffmpeg.test.js

@@ -148,7 +148,8 @@ describe(genName("FFmpeg.exec()"), function () {
   });
 
   it("should stop if timeout", async () => {
-    const ret = await ffmpeg.exec(["-i", "video.mp4", "video.avi"], 1);
+    // Long enough that it cannot finish before the timeout.
+    const ret = await ffmpeg.exec(["-f", "lavfi", "-i", "testsrc=size=320x240:rate=30:duration=3600", "-f", "null", "-"], 50);
     expect(ret).to.equal(1);
   });