Method forward

packages/common/testing/src/location_mock.ts:126–136

()

  }

  forward() {
    if (this._historyIndex < this._history.length - 1) {
      this._historyIndex++;
      this._subject.next({
        'url': this.path(),
        'state': this.getState(),
        'pop': true,
        'type': 'popstate',
      });
    }
  }

  back() {
    if (this._historyIndex > 0) {