RTCEncodedFrame-copy-construction.https.html

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This WPT test may be referenced by the following Test IDs:
- /webrtc-encoded-transform/RTCEncodedFrame-copy-construction.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<html>

<head>

<meta charset="utf-8">

<meta name='timeout' content='long'>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src=/resources/testdriver.js></script>

<script src=/resources/testdriver-vendor.js></script>

<script src="../webrtc/RTCPeerConnection-helper.js"></script>

<script src="helper.js"></script>

</head>

<body>

<script>

const assert_json_equals = (a, b) => assert_equals(JSON.stringify(a), JSON.stringify(b));

const assert_json_not_equals = (a, b) => assert_not_equals(JSON.stringify(a), JSON.stringify(b));

const reuse = {}; // speed up tests

promise_test(async t => {

   const frame = await createRTCEncodedFrameFromScratch("video");

   reuse["video"] = frame;

   assert_true(frame instanceof RTCEncodedVideoFrame);

   assert_equals(frame.type, "key"); // first frame is key

   const clone = new RTCEncodedVideoFrame(frame);

   assert_true(clone instanceof RTCEncodedVideoFrame);

   assert_equals(clone.type, frame.type);

   assert_true(areArrayBuffersEqual(clone.data, frame.data));

   assert_json_equals(clone.getMetadata(), frame.getMetadata());

}, "RTCEncodedVideoFrame copy construction on main thread.");

promise_test(async t => {

   const frame = await createRTCEncodedFrameFromScratch("audio");

   reuse["audio"] = frame;

   assert_true(frame instanceof RTCEncodedAudioFrame);

   const clone = new RTCEncodedAudioFrame(frame);

   assert_true(clone instanceof RTCEncodedAudioFrame);

   assert_equals(clone.type, frame.type);

   assert_true(areArrayBuffersEqual(clone.data, frame.data));

   assert_json_equals(clone.getMetadata(), frame.getMetadata());

}, "RTCEncodedAudioFrame copy construction on main thread.");

function different(value) {

   switch (typeof value) {

     case "number": return value + 1;

     case "string": return value + "2";

     case "object": return Array.isArray(value) ? value.concat([2]) : {};

     default: assert_unreached(`unexpected type ${typeof value}`);

["RTCEncodedVideoFrame", "RTCEncodedAudioFrame"].forEach(constr => {

  const kind = constr.includes("Video")? "video" : "audio";

  promise_test(async t => {

    const frame = reuse[kind];

    const oldData = frame.getMetadata();

    // test single key replacement

    for (const key of Object.keys(oldData)) {

      const metadata = {[key]: different(oldData[key])};

      // Spec says "The new frame’s [[metadata]] is a deep copy

      // of originalFrame.[[metadata]], with fields replaced with

      // deep copies of the fields present in options.[metadata]."

      // This compares well to how Object.assign() works

      const expected = Object.assign(structuredClone(oldData), metadata);

      const clone = new window[constr](frame, {metadata});

      assert_json_equals(clone.getMetadata(), expected);

      assert_json_not_equals(clone.getMetadata(), oldData);

    // test cumulative key replacement

    let metadata = {};

    for (const key of Object.keys(oldData)) {

      Object.assign(metadata, {[key]: different(oldData[key])});

      const expected = Object.assign(structuredClone(oldData), metadata);

      const clone = new window[constr](frame, {metadata});

      assert_json_equals(clone.getMetadata(), expected);

      assert_json_not_equals(clone.getMetadata(), oldData);

  }, `${constr} copy construction metadata override on main thread.`);

  promise_test(async t => {

    const frame = reuse[kind];

    assert_greater_than(frame.data.byteLength, 0);

    const length = frame.data.byteLength;

    const clone = structuredClone(frame);

    assert_equals(frame.data.byteLength, length, "not transferred");

    assert_true(areArrayBuffersEqual(clone.data, frame.data));

    assert_json_equals(clone.getMetadata(), frame.getMetadata());

  }, `${constr} structuredClone on main thread.`);

  promise_test(async t => {

    const frame = reuse[kind];

    assert_greater_than(frame.data.byteLength, 0);

    const length = frame.data.byteLength;

    const clone = structuredClone(frame, {transfer: [frame.data]});

    assert_equals(frame.data.byteLength, 0, "was transferred");

    assert_equals(clone.data.byteLength, length);

  }, `${constr} structuredClone transfer on main thread.`);

});

</script>

</body>

</html>