From 0e7930fbc49f67fae1b69525f356f760a87acd2f Mon Sep 17 00:00:00 2001
From: Harald Alvestrand <hta@chromium.org>
Date: Thu, 24 Mar 2022 12:01:10 +0000
Subject: [PATCH] Bug 1748818 [wpt PR 32269] - Add webrtc-svc tests for
 error-inducing parameters, a=testonly

Automatic update from web-platform-tests
Add webrtc-svc tests for error-inducing parameters

See https://github.com/w3c/webrtc-svc/issues/57, 58, 59 for background.

Bug: none
Change-Id: I4bad7ee6659d01e28cc1d13e9bb595d05e512565
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3369962
Reviewed-by: Florent Castelli <orphis@chromium.org>
Commit-Queue: Harald Alvestrand <hta@chromium.org>
Cr-Commit-Position: refs/heads/main@{#982200}

--

wpt-commits: ce1ae2d8cbd6052da722c7210fa3b7cfa78276ed
wpt-pr: 32269
---
 .../RTCRtpParameters-scalability.html         | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/testing/web-platform/tests/webrtc-svc/RTCRtpParameters-scalability.html b/testing/web-platform/tests/webrtc-svc/RTCRtpParameters-scalability.html
index 52907af55eab9..c32a12807e97f 100644
--- a/testing/web-platform/tests/webrtc-svc/RTCRtpParameters-scalability.html
+++ b/testing/web-platform/tests/webrtc-svc/RTCRtpParameters-scalability.html
@@ -84,4 +84,81 @@
     assert_true(svcSupported);
   }, `Sender capabilities should include at least some scalability modes`);
 
+promise_test(async t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+  const { sender } = pc.addTransceiver('video');
+  const param = sender.getParameters();
+  assert_equals(param.encodings.length, 0);
+}, 'Not setting sendEncodings results in no mode info before negotiation');
+
+promise_test(async t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+  const { sender } = pc.addTransceiver('video', {
+    sendEncodings: [{}],
+  });
+  const param = sender.getParameters();
+  const encoding = getFirstEncoding(param);
+
+  assert_true(!('scalabilityMode' in encoding));
+}, 'Not setting a scalability mode results in no mode set before negotiation');
+
+promise_test(async t => {
+  const pc1 = new RTCPeerConnection();
+  const pc2 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  t.add_cleanup(() => pc2.close());
+  const { sender } = pc1.addTransceiver('video', {
+    sendEncodings: [{}],
+  });
+  const param = sender.getParameters();
+  const encoding = getFirstEncoding(param);
+
+  exchangeIceCandidates(pc1, pc2);
+  await exchangeOfferAnswer(pc1, pc2);
+  const param2 = sender.getParameters();
+  const encoding2 = getFirstEncoding(param);
+  assert_true('scalabilityMode' in encoding2);
+}, 'Not setting a scalability mode results in some mode set after negotiation');
+
+promise_test(async t => {
+    const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+  assert_throws_dom('OperationError', () => {
+    pc.addTransceiver('video', {
+      sendEncodings: [{scalabilityMode: 'TotalNonsense'}],
+    });
+  });
+}, 'Setting a scalability mode to nonsense throws an exception');
+
+
+promise_test(async t => {
+  const v = document.createElement('video');
+  v.autoplay = true;
+  const pc1 = new RTCPeerConnection();
+  const pc2 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  t.add_cleanup(() => pc2.close());
+  const transceiver = pc1.addTransceiver('video', {
+    sendEncodings: [{ scalabilityMode: 'L3T3' }],
+  });
+  // Before negotiation, the mode should be preserved.
+  const param = transceiver.sender.getParameters();
+  const encoding = getFirstEncoding(param);
+  assert_true('scalabilityMode' in encoding);
+  // If L3T3 is not supported at all, abort test.
+  assert_implements_optional(encoding.scalabilityMode === 'L3T3');
+  // Pick a codec known to not have L3T3 support
+  const capabilities = RTCRtpSender.getCapabilities('video');
+  const codec = capabilities.codecs.find(c => c.mimeType === 'video/VP8');
+  assert_true(codec !== undefined);
+  transceiver.setCodecPreferences([codec]);
+  exchangeIceCandidates(pc1, pc2);
+  await exchangeOfferAnswer(pc1, pc2);
+  const sendParams = pc1.getSenders()[0].getParameters();
+  assert_not_equals(sendParams.encodings[0].scalabilityMode, 'L3T3');
+}, 'L3T3 on VP8 should return something other than L3T3');
+
+
 </script>