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/*
* testharness-helpers contains various useful extensions to testharness.js to
* allow them to be used across multiple tests before they have been
* upstreamed. This file is intended to be usable from both document and worker
* environments, so code should for example not rely on the DOM.
*/
// Returns a promise that fulfills after the provided |promise| is fulfilled.
// The |test| succeeds only if |promise| rejects with an exception matching
// |code|. Accepted values for |code| follow those accepted for assert_throws().
// The optional |description| describes the test being performed.
//
// E.g.:
// assert_promise_rejects(
// new Promise(...), // something that should throw an exception.
// 'NotFoundError',
// 'Should throw NotFoundError.');
//
// assert_promise_rejects(
// new Promise(...),
// new TypeError(),
// 'Should throw TypeError');
function assert_promise_rejects(promise, code, description) {
return promise.then(
function() {
throw 'assert_promise_rejects: ' + description + ' Promise did not reject.';
},
function(e) {
if (code !== undefined) {
assert_throws(code, function() { throw e; }, description);
}
});
}
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