1 files changed, 47 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webcodecs/video-encoder-flush.https.any.js b/testing/web-platform/tests/webcodecs/video-encoder-flush.https.any.js
new file mode 100644
index 0000000000..8f1724bc85
--- /dev/null
+++ b/testing/web-platform/tests/webcodecs/video-encoder-flush.https.any.js
@@ -0,0 +1,47 @@
+// META: global=window,dedicatedworker
+// META: script=/common/media.js
+// META: script=/webcodecs/utils.js
+// META: script=/webcodecs/video-encoder-utils.js
+
+promise_test(async t => {
+  let codecInit = getDefaultCodecInit(t);
+  let encoderConfig = {
+    codec: 'vp8',
+    width: 640,
+    height: 480,
+    displayWidth: 800,
+    displayHeight: 600,
+  };
+
+  let outputs = 0;
+  let firstOutput = new Promise(resolve => {
+    codecInit.output = (chunk, metadata) => {
+      outputs++;
+      assert_equals(outputs, 1, 'outputs');
+      encoder.reset();
+      resolve();
+    };
+  });
+
+  let encoder = new VideoEncoder(codecInit);
+  encoder.configure(encoderConfig);
+
+  let frame1 = createFrame(640, 480, 0);
+  let frame2 = createFrame(640, 480, 33333);
+  t.add_cleanup(() => {
+    frame1.close();
+    frame2.close();
+  });
+
+  encoder.encode(frame1);
+  encoder.encode(frame2);
+  const flushDone = encoder.flush();
+
+  // Wait for the first output, then reset.
+  await firstOutput;
+
+  // Flush should have been synchronously rejected.
+  await promise_rejects_dom(t, 'AbortError', flushDone);
+
+  assert_equals(outputs, 1, 'outputs');
+}, 'Test reset during flush');