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<head>
<title>enumerateDevices: test that enumerateDevices is present</title>
<link rel="author" title="Dr Alex Gouaillard" href="mailto:agouaillard@gmail.com"/>
<meta name='assert' content='Check that the enumerateDevices() method is present.'/>
</head>
<body>
<h1 class="instructions">Description</h1>
<p class="instructions">This test checks for the presence of the
<code>navigator.mediaDevices.enumerateDevices()</code> method.</p>
<div id='log'></div>
<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=permission-helper.js></script>
<script>
"use strict";
//NOTE ALEX: for completion, a test for ondevicechange event is missing.
promise_test(async () => {
assert_not_equals(navigator.mediaDevices.enumerateDevices, undefined, "navigator.mediaDevices.enumerateDevices exists");
const devices = await navigator.mediaDevices.enumerateDevices();
for (const {kind, deviceId, label, groupId} of devices) {
assert_in_array(kind, ["videoinput", "audioinput", "audiooutput"]);
assert_equals(deviceId, "", "deviceId should be empty string if getUserMedia was never called successfully.");
assert_equals(label, "", "label should be empty string if getUserMedia was never called successfully.");
assert_equals(groupId, "", "groupId should be empty string if getUserMedia was never called successfully.");
}
assert_less_than_equal(devices.filter(({kind}) => kind == "audioinput").length,
1, "there should be zero or one audio input device.");
assert_less_than_equal(devices.filter(({kind}) => kind == "videoinput").length,
1, "there should be zero or one video input device.");
assert_equals(devices.filter(({kind}) => kind == "audiooutput").length,
0, "there should be no audio output devices.");
assert_less_than_equal(devices.length, 2,
"there should be no more than two devices.");
if (devices.length > 1) {
assert_equals(devices[0].kind, "audioinput", "audioinput is first");
assert_equals(devices[1].kind, "videoinput", "videoinput is second");
}
}, "mediaDevices.enumerateDevices() is present and working - before capture");
promise_test(async t => {
await setMediaPermission("granted");
const stream = await navigator.mediaDevices.getUserMedia({ video: true });
stream.getTracks()[0].stop();
const devices = await navigator.mediaDevices.enumerateDevices();
const kinds = ["audioinput", "videoinput"];
for (const {kind, deviceId} of devices) {
assert_in_array(kind, kinds, "camera doesn't expose audiooutput");
assert_equals(typeof deviceId, "string", "deviceId is a string.");
switch (kind) {
case "videoinput":
assert_greater_than(deviceId.length, 0, "video deviceId should not be empty.");
break;
case "audioinput":
assert_equals(deviceId.length, 0, "audio deviceId should be empty.");
break;
}
}
}, "mediaDevices.enumerateDevices() is working - after video capture");
// This test is designed to come after its video counterpart directly above
promise_test(async t => {
const devices1 = await navigator.mediaDevices.enumerateDevices();
const stream = await navigator.mediaDevices.getUserMedia({ audio: true });
stream.getTracks()[0].stop();
const devices = await navigator.mediaDevices.enumerateDevices();
assert_equals(devices.filter(({kind}) => kind == "videoinput").length,
devices1.filter(({kind}) => kind == "videoinput").length,
"same number of (previously exposed) videoinput devices");
assert_greater_than_equal(devices.filter(d => d.kind == "audioinput").length,
devices1.filter(d => d.kind == "audioinput").length,
"same number or more audioinput devices");
const order = ["audioinput", "videoinput", "audiooutput"];
for (const {kind, deviceId} of devices) {
assert_in_array(kind, order, "expected kind");
assert_equals(typeof deviceId, "string", "deviceId is a string.");
switch (kind) {
case "videoinput":
assert_greater_than(deviceId.length, 0, "video deviceId should not be empty.");
break;
case "audioinput":
assert_greater_than(deviceId.length, 0, "audio deviceId should not be empty.");
break;
}
}
const kinds = devices.map(({kind}) => kind);
const correct = [...kinds].sort((a, b) => order.indexOf(a) - order.indexOf(b));
assert_equals(JSON.stringify(kinds), JSON.stringify(correct), "correct order");
}, "mediaDevices.enumerateDevices() is working - after video then audio capture");
promise_test(async () => {
const devices = await navigator.mediaDevices.enumerateDevices();
for (const mediaInfo of devices) {
if (mediaInfo.kind == "audioinput" || mediaInfo.kind == "videoinput") {
assert_true("InputDeviceInfo" in window, "InputDeviceInfo exists");
assert_true(mediaInfo instanceof InputDeviceInfo);
} else if (mediaInfo.kind == "audiooutput") {
assert_true(mediaInfo instanceof MediaDeviceInfo);
} else {
assert_unreached("mediaInfo.kind should be one of 'audioinput', 'videoinput', or 'audiooutput'.")
}
}
}, "InputDeviceInfo is supported");
</script>
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