angular2
Version:
Angular 2 - a web framework for modern web apps
105 lines • 13 kB
JavaScript
import { XHR } from 'angular2/src/compiler/xhr';
import { ListWrapper, Map } from 'angular2/src/facade/collection';
import { isBlank, normalizeBlank } from 'angular2/src/facade/lang';
import { BaseException } from 'angular2/src/facade/exceptions';
import { PromiseWrapper } from 'angular2/src/facade/async';
/**
* A mock implementation of {@link XHR} that allows outgoing requests to be mocked
* and responded to within a single test, without going to the network.
*/
export class MockXHR extends XHR {
constructor(...args) {
super(...args);
this._expectations = [];
this._definitions = new Map();
this._requests = [];
}
get(url) {
var request = new _PendingRequest(url);
this._requests.push(request);
return request.getPromise();
}
/**
* Add an expectation for the given URL. Incoming requests will be checked against
* the next expectation (in FIFO order). The `verifyNoOutstandingExpectations` method
* can be used to check if any expectations have not yet been met.
*
* The response given will be returned if the expectation matches.
*/
expect(url, response) {
var expectation = new _Expectation(url, response);
this._expectations.push(expectation);
}
/**
* 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.
*/
when(url, response) { this._definitions.set(url, response); }
/**
* Process pending requests and verify there are no outstanding expectations. Also fails
* if no requests are pending.
*/
flush() {
if (this._requests.length === 0) {
throw new BaseException('No pending requests to flush');
}
do {
this._processRequest(this._requests.shift());
} while (this._requests.length > 0);
this.verifyNoOutstandingExpectations();
}
/**
* Throw an exception if any expectations have not been satisfied.
*/
verifyNoOutstandingExpectations() {
if (this._expectations.length === 0)
return;
var urls = [];
for (var i = 0; i < this._expectations.length; i++) {
var expectation = this._expectations[i];
urls.push(expectation.url);
}
throw new BaseException(`Unsatisfied requests: ${urls.join(', ')}`);
}
_processRequest(request) {
var url = request.url;
if (this._expectations.length > 0) {
var expectation = this._expectations[0];
if (expectation.url == url) {
ListWrapper.remove(this._expectations, expectation);
request.complete(expectation.response);
return;
}
}
if (this._definitions.has(url)) {
var response = this._definitions.get(url);
request.complete(normalizeBlank(response));
return;
}
throw new BaseException(`Unexpected request ${url}`);
}
}
class _PendingRequest {
constructor(url) {
this.url = url;
this.completer = PromiseWrapper.completer();
}
complete(response) {
if (isBlank(response)) {
this.completer.reject(`Failed to load ${this.url}`, null);
}
else {
this.completer.resolve(response);
}
}
getPromise() { return this.completer.promise; }
}
class _Expectation {
constructor(url, response) {
this.url = url;
this.response = response;
}
}
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Incoming requests will be checked against\n   * the next expectation (in FIFO order). The `verifyNoOutstandingExpectations` method\n   * can be used to check if any expectations have not yet been met.\n   *\n   * The response given will be returned if the expectation matches.\n   */\n  expect(url: string, response: string) {\n    var expectation = new _Expectation(url, response);\n    this._expectations.push(expectation);\n  }\n\n  /**\n   * Add a definition for the given URL to return the given response. Unlike expectations,\n   * definitions have no order and will satisfy any matching request at any time. Also\n   * unlike expectations, unused definitions do not cause `verifyNoOutstandingExpectations`\n   * to return an error.\n   */\n  when(url: string, response: string) { this._definitions.set(url, response); }\n\n  /**\n   * Process pending requests and verify there are no outstanding expectations. Also fails\n   * if no requests are pending.\n   */\n  flush() {\n    if (this._requests.length === 0) {\n      throw new BaseException('No pending requests to flush');\n    }\n\n    do {\n      this._processRequest(this._requests.shift());\n    } while (this._requests.length > 0);\n\n    this.verifyNoOutstandingExpectations();\n  }\n\n  /**\n   * Throw an exception if any expectations have not been satisfied.\n   */\n  verifyNoOutstandingExpectations() {\n    if (this._expectations.length === 0) return;\n\n    var urls = [];\n    for (var i = 0; i < this._expectations.length; i++) {\n      var expectation = this._expectations[i];\n      urls.push(expectation.url);\n    }\n\n    throw new BaseException(`Unsatisfied requests: ${urls.join(', ')}`);\n  }\n\n  private _processRequest(request: _PendingRequest) {\n    var url = request.url;\n\n    if (this._expectations.length > 0) {\n      var expectation = this._expectations[0];\n      if (expectation.url == url) {\n        ListWrapper.remove(this._expectations, expectation);\n        request.complete(expectation.response);\n        return;\n      }\n    }\n\n    if (this._definitions.has(url)) {\n      var response = this._definitions.get(url);\n      request.complete(normalizeBlank(response));\n      return;\n    }\n\n    throw new BaseException(`Unexpected request ${url}`);\n  }\n}\n\nclass _PendingRequest {\n  url: string;\n  completer: PromiseCompleter<string>;\n\n  constructor(url) {\n    this.url = url;\n    this.completer = PromiseWrapper.completer();\n  }\n\n  complete(response: string) {\n    if (isBlank(response)) {\n      this.completer.reject(`Failed to load ${this.url}`, null);\n    } else {\n      this.completer.resolve(response);\n    }\n  }\n\n  getPromise(): Promise<string> { return this.completer.promise; }\n}\n\nclass _Expectation {\n  url: string;\n  response: string;\n  constructor(url: string, response: string) {\n    this.url = url;\n    this.response = response;\n  }\n}\n"]}