1 files changed, 80 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webcodecs/chunk-serialization.any.js b/testing/web-platform/tests/webcodecs/chunk-serialization.any.js
new file mode 100644
index 0000000000..821a71170d
--- /dev/null
+++ b/testing/web-platform/tests/webcodecs/chunk-serialization.any.js
@@ -0,0 +1,80 @@
+// META: global=window
+// META: script=/common/media.js
+// META: script=/webcodecs/utils.js
+
+var defaultAudioInit = {
+  type: 'key',
+  timestamp: 1234,
+  duration: 9876,
+  data: new Uint8Array([5, 6, 7, 8])
+};
+
+var defaultVideoInit = {
+  type: 'key',
+  timestamp: 1234,
+  duration: 5678,
+  data: new Uint8Array([9, 10, 11, 12])
+};
+
+function createDefaultChunk(type, init) {
+  return type == 'audio' ? new EncodedAudioChunk(init) :
+                           new EncodedVideoChunk(init);
+}
+
+function runTest(t, type) {
+  let defaultInit = type == 'audio' ? defaultAudioInit : defaultVideoInit;
+  let originalData = createDefaultChunk(type, defaultInit);
+
+  let channel = new MessageChannel();
+  let localPort = channel.port1;
+  let externalPort = channel.port2;
+
+  externalPort.onmessage = t.step_func((e) => {
+    let newData = e.data;
+
+    // We should have a valid deserialized buffer.
+    assert_equals(newData.type, defaultInit.type, 'type');
+    assert_equals(newData.duration, defaultInit.duration, 'duration');
+    assert_equals(newData.timestamp, defaultInit.timestamp, 'timestamp');
+    assert_equals(
+        newData.byteLength, defaultInit.data.byteLength, 'byteLength');
+
+    const originalData_copyDest = new Uint8Array(defaultInit.data);
+    const newData_copyDest = new Uint8Array(defaultInit.data);
+
+    originalData.copyTo(originalData_copyDest);
+    newData.copyTo(newData_copyDest);
+
+    for (var i = 0; i < newData_copyDest.length; ++i) {
+      assert_equals(
+          newData_copyDest[i], originalData_copyDest[i], `data (i=${i})`);
+    }
+
+    externalPort.postMessage('Done');
+  })
+
+  localPort.onmessage = t.step_func_done((e) => {
+    assert_equals(originalData.type, defaultInit.type, 'type');
+    assert_equals(originalData.duration, defaultInit.duration, 'duration');
+    assert_equals(originalData.timestamp, defaultInit.timestamp, 'timestamp');
+    assert_equals(
+        originalData.byteLength, defaultInit.data.byteLength, 'byteLength');
+  })
+
+  localPort.postMessage(originalData);
+}
+
+async_test(t => {
+  runTest(t, 'audio');
+}, 'Verify EncodedAudioChunk is serializable.');
+
+
+async_test(t => {
+  runTest(t, 'video');
+}, 'Verify EncodedVideoChunk is serializable.');
+
+test(() => {
+  const chunk = createDefaultChunk("video", defaultVideoInit);
+  if (window.history)
+      assert_throws_dom("DataCloneError", () => history.pushState({ chunk }, null));
+}, "Verify EncodedVideoChunk cannot be stored");