Method when

packages/core/test/linker/resource_loader_mock.ts:48–50

* Add a definition for the given URL to return the given response. Unlike expectations, * definitions have no order and will satisfy any matching request at any time. Also * unlike expectations, unused definitions do not cause `verifyNoOutstandingExpectations` * to return an error.

(url: string, response: string)

   * to return an error.
   */
  when(url: string, response: string) {
    this._definitions.set(url, response);
  }

  /**
   * Process pending requests and verify there are no outstanding expectations. Also fails