1 files changed, 83 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audiocontext-interface/audiocontext-sinkid-state-change.https.html b/testing/web-platform/tests/webaudio/the-audio-api/the-audiocontext-interface/audiocontext-sinkid-state-change.https.html
new file mode 100644
index 0000000000..c22f69c18d
--- /dev/null
+++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audiocontext-interface/audiocontext-sinkid-state-change.https.html
@@ -0,0 +1,83 @@
+<!DOCTYPE html>
+<head>
+<title>Test AudioContext.setSinkId() state change</title>
+</head>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script>
+"use strict";
+
+const audioContext = new AudioContext();
+let outputDeviceList = null;
+let firstDeviceId = null;
+
+// Setup: Get permission via getUserMedia() and a list of audio output devices.
+promise_setup(async t => {
+  await navigator.mediaDevices.getUserMedia({ audio: true });
+  const deviceList = await navigator.mediaDevices.enumerateDevices();
+  outputDeviceList =
+      deviceList.filter(({kind}) => kind === 'audiooutput');
+  assert_greater_than(outputDeviceList.length, 1,
+                      'the system must have more than 1 device.');
+  firstDeviceId = outputDeviceList[1].deviceId;
+}, 'Get permission via getUserMedia() and a list of audio output devices.');
+
+// Test the sink change when from a suspended context.
+promise_test(async t => {
+  let events = [];
+  await audioContext.suspend();
+
+  // Step 6. Set wasRunning to false if the [[rendering thread state]] on the
+  // AudioContext is "suspended".
+  assert_equals(audioContext.state, 'suspended');
+
+  // Step 11.5. Fire an event named sinkchange at the associated AudioContext.
+  audioContext.onsinkchange = t.step_func(() => {
+    events.push('sinkchange');
+    assert_equals(audioContext.sinkId, firstDeviceId);
+  });
+
+  await audioContext.setSinkId(firstDeviceId);
+  assert_equals(events[0], 'sinkchange');
+  t.done();
+}, 'Calling setSinkId() on a suspended AudioContext should fire only sink ' +
+   'change events.');
+
+// Test the sink change when from a running context.
+promise_test(async t => {
+  let events = [];
+  await audioContext.resume();
+
+  // Step 9. If wasRunning is true:
+  assert_equals(audioContext.state, 'running');
+
+  // Step 9.2.1. Set the state attribute of the AudioContext to "suspended".
+  // Fire an event named statechange at the associated AudioContext.
+  audioContext.onstatechange = t.step_func(() => {
+    events.push('statechange:suspended');
+    assert_equals(audioContext.state, 'suspended');
+  });
+
+  // Step 11.5. Fire an event named sinkchange at the associated AudioContext.
+  audioContext.onsinkchange = t.step_func(() => {
+    events.push('sinkchange');
+    assert_equals(audioContext.sinkId, firstDeviceId);
+  });
+
+  // Step 12.2. Set the state attribute of the AudioContext to "running".
+  // Fire an event named statechange at the associated AudioContext.
+  audioContext.onstatechange = t.step_func(() => {
+    events.push('statechange:running');
+    assert_equals(audioContext.state, 'running');
+  });
+
+  await audioContext.setSinkId(firstDeviceId);
+  assert_equals(events.length, 3);
+  assert_equals(events[0], 'statechange:suspended');
+  assert_equals(events[1], 'sinkchange');
+  assert_equals(events[2], 'statechange:running');
+  t.done();
+}, 'Calling setSinkId() on a running AudioContext should fire both state ' +
+   'and sink change events.');
+</script>
+</html>