angular-docs-cn/modules/@angular/benchpress/test/metric/multi_metric_spec.ts

/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {AsyncTestCompleter, describe, expect, inject, it} from '@angular/core/testing/testing_internal';
import {Metric, MultiMetric, ReflectiveInjector} from '../../index';

export function main() {
  function createMetric(ids: any[]) {
    var m = ReflectiveInjector
                .resolveAndCreate([
                  ids.map(id => ({provide: id, useValue: new MockMetric(id)})),
                  MultiMetric.provideWith(ids)
                ])
                .get(MultiMetric);
    return Promise.resolve(m);
  }

  describe('multi metric', () => {
    it('should merge descriptions', inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         createMetric(['m1', 'm2']).then((m) => {
           expect(m.describe()).toEqual({'m1': 'describe', 'm2': 'describe'});
           async.done();
         });
       }));

    it('should merge all beginMeasure calls',
       inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
         createMetric(['m1', 'm2']).then((m) => m.beginMeasure()).then((values) => {
           expect(values).toEqual(['m1_beginMeasure', 'm2_beginMeasure']);
           async.done();
         });
       }));

    [false, true].forEach((restartFlag) => {
      it(`should merge all endMeasure calls for restart=${restartFlag}`,
         inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
           createMetric(['m1', 'm2']).then((m) => m.endMeasure(restartFlag)).then((values) => {
             expect(values).toEqual(
                 {'m1': {'restart': restartFlag}, 'm2': {'restart': restartFlag}});
             async.done();
           });
         }));
    });

  });
}

class MockMetric extends Metric {
  constructor(private _id: string) { super(); }

  beginMeasure(): Promise<string> { return Promise.resolve(`${this._id}_beginMeasure`); }

  endMeasure(restart: boolean): Promise<{[key: string]: any}> {
    var result: {[key: string]: any} = {};
    result[this._id] = {'restart': restart};
    return Promise.resolve(result);
  }

  describe(): {[key: string]: string} {
    var result: {[key: string]: string} = {};
    result[this._id] = 'describe';
    return result;
  }
}