angular2/es6/prod/src/testing/async.js

Angular 2 - a web framework for modern web apps

/**
 * Wraps a test function in an asynchronous test zone. The test will automatically
 * complete when all asynchronous calls within this zone are done. Can be used
 * to wrap an {@link inject} call.
 *
 * Example:
 *
 * ```
 * it('...', async(inject([AClass], (object) => {
 *   object.doSomething.then(() => {
 *     expect(...);
 *   })
 * });
 * ```
 */
export function async(fn) {
    return () => {
        return new Promise((finishCallback, failCallback) => {
            var AsyncTestZoneSpec = Zone['AsyncTestZoneSpec'];
            var testZoneSpec = new AsyncTestZoneSpec(finishCallback, failCallback, 'test');
            var testZone = Zone.current.fork(testZoneSpec);
            return testZone.run(fn);
        });
    };
}