angular__angular/packages/benchpress/test/metric/multi_metric_spec.ts

/**
 * @license
 * Copyright Google LLC 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 {Injector, Metric, MultiMetric} from '../../index';

(function () {
  function createMetric(ids: any[]) {
    const m = Injector.create({
      providers: [
        ids.map((id) => ({provide: id, useValue: new MockMetric(id)})),
        MultiMetric.provideWith(ids),
      ],
    }).get<MultiMetric>(MultiMetric);
    return Promise.resolve(m);
  }

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

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

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

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

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

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

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