多个连续的httpBackend请求会导致意外的请求

时间:2015-07-28 06:16:12

标签: angular-resource httpbackend

我正在测试轮询资源的序列,直到满足条件。

Book = $resource("/books/:id", {id: "@id"});

function poll(success) {
  Book.get({id:1}, function() {
    if (canStop) {
       success();
    } else {
       $timeout(poll, 1000);
    }

  });
};

以下测试因Error: Unsatisfied requests: GET /user_workshops/1

而失败
describe('poll', function() {
  beforeEach(function() {
    $httpBackend.expectGET('/books/1').respond(200,{id:1});
    $httpBackend.expectGET('/books/1').respond(200,{id:1, newVal:1});

    poll(function() {
       successCalled = true;
    });

    $httpBackend.flush();
    $timeout.flush();

    canStop=true;

    $httpBackend.flush();
  });

  it('should call success when canStop is true', function() {
     expect(successCalled).toBe(true);
  });
});

我尝试重新排列测试订单,将第二个expectGET放在第二个httpBackend.flush()之前,但后来我得到了:

Error: Unexpected request: POST /books/1
No more request expected

2 个答案:

答案 0 :(得分:10)

经过一个小时的拔毛后,我意识到httpBackend是非常特定于测试被调用的顺序 - 期望必须不是在调用flush之前设置,而是在资源请求之前设置已经完成,当你打电话时,你必须完全准确地做出预期的请求。

这意味着如果要在顺序请求之间进行刷新,请求和期望的顺序必须完全符合:

$httpBackend.expectGET('...')
resource.get();
$httpBackend.flush()
$httpBackend.expectGET('...')
resource.get();
$httpBackend.flush()
...
etc

所以在上面代码的情况下,如果我将排序更改为:

,它就有效
describe('poll', function() {
  beforeEach(function() {
    $httpBackend.expectGET('/books/1').respond(200,{id:1});

    poll(function() {
       successCalled = true;
    });

    $httpBackend.flush();

    $httpBackend.expectGET('/books/1').respond(200,{id:1, newVal:1});

    $timeout.flush();
    canStop=true;

    $httpBackend.flush();
  });

  it('should call success when canStop is true', function() {
     expect(successCalled).toBe(true);
  });
});

答案 1 :(得分:0)

您还可以在每次通话时重新安装$ httpBackend方法。有点像:

var deleteMethod = function () {
    $httpBackend.when('DELETE', /.*/gi).respond(function(method, url, data) {
        deleteMethod(); // <--- See here method is rearmed
        return [200, 'OK', {}];
    });
}
deleteMethod();