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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1041393
+-->
+<head>
+ <meta charset="utf-8">
+ <title>ImageCapture tests</title>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <script type="text/javascript" src="gUM_support.js"></script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1041393">ImageCapture tests</a>
+<script type="application/javascript">
+
+// Check if the callback returns even no JS reference on it.
+async function gcTest(track) {
+ const repeat = 100;
+ const promises = [];
+ for (let i = 0; i < repeat; ++i) {
+ const imageCapture = new ImageCapture(track);
+ promises.push(new Promise((resolve, reject) => {
+ imageCapture.onphoto = resolve;
+ imageCapture.onerror = () =>
+ reject(new Error(`takePhoto gcTest failure for capture ${i}`));
+ }));
+ imageCapture.takePhoto();
+ }
+ info("Call gc ");
+ SpecialPowers.gc();
+ await Promise.all(promises);
+}
+
+// Continue calling takePhoto() in rapid succession.
+async function rapidTest(track) {
+ const repeat = 100;
+ const imageCapture = new ImageCapture(track);
+ // "error" can fire synchronously in `takePhoto`
+ const errorPromise = new Promise(r => imageCapture.onerror = r);
+ for (let i = 0; i < repeat; ++i) {
+ imageCapture.takePhoto();
+ }
+ for (let i = 0; i < repeat; ++i) {
+ await Promise.race([
+ new Promise(r => imageCapture.onphoto = r),
+ errorPromise.then(() => Promise.reject(new Error("Capture failed"))),
+ ]);
+ }
+}
+
+// Check if the blob is decodable.
+async function blobTest(track) {
+ const imageCapture = new ImageCapture(track);
+ // "error" can fire synchronously in `takePhoto`
+ const errorPromise = new Promise(r => imageCapture.onerror = r);
+ imageCapture.takePhoto();
+ const blob = await Promise.race([
+ new Promise(r => imageCapture.onphoto = r),
+ errorPromise.then(() => Promise.reject(new Error("Capture failed"))),
+ ]);
+
+ const img = new Image();
+ img.src = URL.createObjectURL(blob.data);
+ await new Promise((resolve, reject) => {
+ img.onload = resolve;
+ img.onerror = () => reject(new Error("Decode failed"));
+ });
+}
+
+// It should return an error event after disabling video track.
+async function trackTest(track) {
+ const imageCapture = new ImageCapture(track);
+ track.enabled = false;
+ try {
+ const errorPromise = new Promise(r => imageCapture.onerror = r);
+ imageCapture.takePhoto();
+ const error = await Promise.race([
+ errorPromise,
+ new Promise(r => imageCapture.onphoto = r).then(
+ () => Promise.reject(new Error("Disabled video track should fail"))),
+ ]);
+ is(error.imageCaptureError.code, error.imageCaptureError.PHOTO_ERROR,
+ "Expected error code")
+ } finally {
+ track.enabled = true;
+ }
+}
+
+async function init() {
+ // Use loopback camera if available, otherwise fake.
+ // MediaTrackGraph will be the backend of ImageCapture.
+ await setupGetUserMediaTestPrefs();
+ let stream = await navigator.mediaDevices.getUserMedia({video: true});
+ return stream.getVideoTracks()[0];
+}
+
+async function start() {
+ try {
+ const track = await init();
+ info("ImageCapture track disable test.");
+ await trackTest(track);
+ info("ImageCapture blob test.");
+ await blobTest(track);
+ info("ImageCapture rapid takePhoto() test.");
+ await rapidTest(track);
+ info("ImageCapture multiple instances test.");
+ await gcTest(track);
+ } catch (e) {
+ ok(false, "Unexpected error during test: " + e);
+ } finally {
+ SimpleTest.finish();
+ }
+}
+
+SimpleTest.requestCompleteLog();
+SimpleTest.waitForExplicitFinish();
+
+SpecialPowers.pushPrefEnv({
+ "set": [
+ ["dom.imagecapture.enabled", true],
+ ["media.navigator.permission.disabled", true],
+ ],
+}, start);
+</script>
+</pre>
+</body>
+</html>