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<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title>TestDriver bless method</title>
<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>
promise_test(() => {
return test_driver.bless('empty', () => {});
}, 'functions in the absence of a `body` element');
</script>
</head>
<body>
<script>
// At the time of this writing, the only standard requirement for user
// activation concerns the interaction between iframe elements and their parent
// browsing contexts [1]. Because testdriver.js currently cannot operate within
// an iframe, the standard requirement cannot be used to verify the correctness
// of the `bless` method. Instead, rely on the optional behavior of early exit
// and rejecting in `video.play()` if the media is not "allowed to play". [2]
// Browsers which don't implement this will pass this test spuriously.
//
// [1] https://html.spec.whatwg.org/multipage/origin.html#attr-iframe-sandbox-allow-top-navigation-by-user-activation
// [2] https://html.spec.whatwg.org/multipage/media.html#allowed-to-play
promise_test(t => {
const video = document.createElement('video');
document.body.appendChild(video);
t.add_cleanup(() => video.remove());
return test_driver.bless('start video playback', () => {
// `paused` changes before `play()` returns when "allowed to play", so the
// promise, if any, is ignored.
assert_true(video.paused);
const playPromise = video.play();
assert_false(video.paused);
if (playPromise) {
playPromise.catch(() => {});
}
});
}, 'user activation');
promise_test(() => {
return test_driver.bless('demonstrates return value without action')
.then((value) => {
assert_equals(value, null);
});
}, 'no action function provided');
promise_test(() => {
const expectedValue = {};
return test_driver.bless('demonstrate a synchronous return value', () => {
return expectedValue;
}).then((actualValue) => {
assert_equals(
actualValue,
expectedValue,
'the promise should be fulfilled with the returned value'
);
});
}, 'synchronous return value');
promise_test(() => {
const expectedError = new Error();
return test_driver.bless('demonstrates a synchronous error', () => {
throw expectedError;
})
.then(() => {
assert_unreached('the promise should be rejected');
}, (actualError) => {
assert_equals(
actualError,
expectedError,
'the promise should be rejected with the thrown value'
);
});
}, 'synchronous error');
promise_test(() => {
const expectedValue = {};
return test_driver.bless('demonstrate an asynchronous return value', () => {
return Promise.resolve(expectedValue);
}).then((actualValue) => {
assert_equals(
actualValue,
expectedValue,
'the promise should be fulfilled with the fulfillment value'
);
});
}, 'asynchronous return value');
promise_test(() => {
const expectedError = new Error();
return test_driver.bless('demonstrates an asynchronous error', () => {
return Promise.reject(expectedError);
})
.then(() => {
assert_unreached('the promise should be rejected');
}, (actualError) => {
assert_equals(
actualError,
expectedError,
'the promise should be rejected with the rejected value'
);
});
}, 'asynchronous error');
</script>
</body>
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