问Swift单元测试:未执行闭包体

EN

func testIt() {
  let expectation = expectationWithDescription("foobar")

  // request setup code here...

  Alamofire.request(.POST, "...")
    .responseJSON { response in
      //
      // Insert the test assertions here, for example:
      //
      if let JSON = response.result.value as? [String: AnyObject] {
        XCTAssertEqual(JSON["id"], "1")
      } else {
        XCTFail("Unexpected response")
      }

      //
      // Remember to call this at the end of the closure
      //
      expectation.fulfill()
  }

  //
  // This will make XCTest wait for up to 10 seconds,
  // giving your request expectation time to fulfill
  //
  waitForExpectationsWithTimeout(10) { error 
    if let error = error {
      XCTFail("Error: \(error.localizedDescription)")
    }
  }
}