httpSpec.js

'use strict';

describe('$http', function() {

  var callback;

  beforeEach(function() {
    callback = jasmine.createSpy('done');
  });

  beforeEach(module(function($exceptionHandlerProvider) {
      $exceptionHandlerProvider.mode('log');
  }));

  afterEach(inject(function($exceptionHandler, $httpBackend) {
    forEach($exceptionHandler.errors, function(e) {
      dump('Unhandled exception: ', e)
    });

    if ($exceptionHandler.errors.length) {
      throw 'Unhandled exceptions trapped in $exceptionHandler!';
    }

    $httpBackend.verifyNoOutstandingExpectation();
  }));


  describe('$httpProvider', function() {

    describe('interceptors', function() {

      it('should default to an empty array', module(function($httpProvider) {
        expect($httpProvider.responseInterceptors).toEqual([]);
      }));


      it('should pass the responses through interceptors', function() {
        module(function($httpProvider, $provide) {
          $provide.factory('testInterceptor', function ($q) {
            return function(httpPromise) {
              return httpPromise.then(function(response) {
                var deferred = $q.defer();
                deferred.resolve({
                  data: response.data + '?',
                  status: 209,
                  headers: response.headers,
                  config: response.config
                });
                return deferred.promise;
              });
            };
          });
          // just change the response data and pass the response object along
          $httpProvider.responseInterceptors.push(function() {
            return function(httpPromise) {
              return httpPromise.then(function(response) {
                response.data += '!';
                return response;
              });
            }
          });

          // return a new resolved promise representing modified response object
          $httpProvider.responseInterceptors.push('testInterceptor');
        });
        inject(function($http, $httpBackend) {
          $httpBackend.expect('GET', '/foo').respond(201, 'Hello');
          $http.get('/foo').success(function(data, status) {
            expect(data).toBe('Hello!?');
            expect(status).toBe(209);
            callback();
          });
          $httpBackend.flush();
          expect(callback).toHaveBeenCalledOnce();
        });
      });


      it('should support interceptors defined as services', function() {
        module(function($provide, $httpProvider) {
          $provide.factory('myInterceptor', function() {
            return function(promise) {
              return promise.then(function(response) {
                response.data = uppercase(response.data);
                return response;
              });
            }
          });
          $httpProvider.responseInterceptors.push('myInterceptor');
        });
        inject(function($http, $httpBackend) {
          var response;

          $httpBackend.expect('GET', '/test').respond('hello!');
          $http.get('/test').success(function(data) {response = data;});
          expect(response).toBeUndefined();

          $httpBackend.flush();
          expect(response).toBe('HELLO!');
        });
      });
    });
  });


  describe('the instance', function() {
    var $httpBackend, $http, $rootScope;

    beforeEach(inject(['$rootScope', function($rs) {
      $rootScope = $rs;

      spyOn($rootScope, '$apply').andCallThrough();
    }]));

    beforeEach(inject(['$httpBackend', '$http', function($hb, $h) {
      $httpBackend = $hb;
      $http = $h;
    }]));


    it('should do basic request', inject(function($httpBackend, $http) {
      $httpBackend.expect('GET', '/url').respond('');
      $http({url: '/url', method: 'GET'});
    }));


    it('should pass data if specified', inject(function($httpBackend, $http) {
      $httpBackend.expect('POST', '/url', 'some-data').respond('');
      $http({url: '/url', method: 'POST', data: 'some-data'});
    }));


    describe('params', function() {
      it('should do basic request with params and encode', inject(function($httpBackend, $http) {
        $httpBackend.expect('GET', '/url?a%3D=%3F%26&b=2').respond('');
        $http({url: '/url', params: {'a=':'?&', b:2}, method: 'GET'});
      }));


      it('should merge params if url contains some already', inject(function($httpBackend, $http) {
        $httpBackend.expect('GET', '/url?c=3&a=1&b=2').respond('');
        $http({url: '/url?c=3', params: {a:1, b:2}, method: 'GET'});
      }));


      it('should jsonify objects in params map', inject(function($httpBackend, $http) {
        $httpBackend.expect('GET', '/url?a=1&b=%7B%22c%22%3A3%7D').respond('');
        $http({url: '/url', params: {a:1, b:{c:3}}, method: 'GET'});
      }));
    });


    describe('callbacks', function() {

      it('should pass in the response object when a request is successful', function() {
        $httpBackend.expect('GET', '/url').respond(207, 'my content', {'content-encoding': 'smurf'});
        $http({url: '/url', method: 'GET'}).then(function(response) {
          expect(response.data).toBe('my content');
          expect(response.status).toBe(207);
          expect(response.headers()).toEqual({'content-encoding': 'smurf'});
          expect(response.config.url).toBe('/url');
          callback();
        });

        $httpBackend.flush();
        expect(callback).toHaveBeenCalledOnce();
      });


      it('should pass in the response object when a request failed', function() {
        $httpBackend.expect('GET', '/url').respond(543, 'bad error', {'request-id': '123'});
        $http({url: '/url', method: 'GET'}).then(null, function(response) {
          expect(response.data).toBe('bad error');
          expect(response.status).toBe(543);
          expect(response.headers()).toEqual({'request-id': '123'});
          expect(response.config.url).toBe('/url');
          callback();
        });

        $httpBackend.flush();
        expect(callback).toHaveBeenCalledOnce();
      });


      describe('success', function() {
        it('should allow http specific callbacks to be registered via "success"', function() {
          $httpBackend.expect('GET', '/url').respond(207, 'my content', {'content-encoding': 'smurf'});
          $http({url: '/url', method: 'GET'}).success(function(data, status, headers, config) {
            expect(data).toBe('my content');
            expect(status).toBe(207);
            expect(headers()).toEqual({'content-encoding': 'smurf'});
            expect(config.url).toBe('/url');
            callback();
          });

          $httpBackend.flush();
          expect(callback).toHaveBeenCalledOnce();
        });


        it('should return the original http promise', function() {
          $httpBackend.expect('GET', '/url').respond(207, 'my content', {'content-encoding': 'smurf'});
          var httpPromise = $http({url: '/url', method: 'GET'});
          expect(httpPromise.success(callback)).toBe(httpPromise);
        });
      });


      describe('error', function() {
        it('should allow http specific callbacks to be registered via "error"', function() {
          $httpBackend.expect('GET', '/url').respond(543, 'bad error', {'request-id': '123'});
          $http({url: '/url', method: 'GET'}).error(function(data, status, headers, config) {
            expect(data).toBe('bad error');
            expect(status).toBe(543);
            expect(headers()).toEqual({'request-id': '123'});
            expect(config.url).toBe('/url');
            callback();
          });

          $httpBackend.flush();
          expect(callback).toHaveBeenCalledOnce();
        });


        it('should return the original http promise', function() {
          $httpBackend.expect('GET', '/url').respond(543, 'bad error', {'request-id': '123'});
          var httpPromise = $http({url: '/url', method: 'GET'});
          expect(httpPromise.error(callback)).toBe(httpPromise);
        });
      });
    });


    describe('response headers', function() {

      it('should return single header', function() {
        $httpBackend.expect('GET', '/url').respond('', {'date': 'date-val'});
        callback.andCallFake(function(r) {
          expect(r.headers('date')).toBe('date-val');
        });

        $http({url: '/url', method: 'GET'}).then(callback);
        $httpBackend.flush();

        expect(callback).toHaveBeenCalledOnce();
      });


      it('should return null when single header does not exist', function() {
        $httpBackend.expect('GET', '/url').respond('', {'Some-Header': 'Fake'});
        callback.andCallFake(function(r) {
          r.headers(); // we need that to get headers parsed first
          expect(r.headers('nothing')).toBe(null);
        });

        $http({url: '/url', method: 'GET'}).then(callback)
        $httpBackend.flush();

        expect(callback).toHaveBeenCalledOnce();
      });


      it('should return all headers as object', function() {
        $httpBackend.expect('GET', '/url').respond('', {
          'content-encoding': 'gzip',
          'server': 'Apache'
        });

        callback.andCallFake(function(r) {
          expect(r.headers()).toEqual({'content-encoding': 'gzip', 'server': 'Apache'});
        });

        $http({url: '/url', method: 'GET'}).then(callback);
        $httpBackend.flush();

        expect(callback).toHaveBeenCalledOnce();
      });


      it('should return empty object for jsonp request', function() {
        callback.andCallFake(function(r) {
          expect(r.headers()).toEqual({});
        });

        $httpBackend.expect('JSONP', '/some').respond(200);
        $http({url: '/some', method: 'JSONP'}).then(callback);
        $httpBackend.flush();
        expect(callback).toHaveBeenCalledOnce();
      });
    });


    describe('response headers parser', function() {

      it('should parse basic', function() {
        var parsed = parseHeaders(
            'date: Thu, 04 Aug 2011 20:23:08 GMT\n' +
            'content-encoding: gzip\n' +
            'transfer-encoding: chunked\n' +
            'x-cache-info: not cacheable; response has already expired, not cacheable; response has already expired\n' +
            'connection: Keep-Alive\n' +
            'x-backend-server: pm-dekiwiki03\n' +
            'pragma: no-cache\n' +
            'server: Apache\n' +
            'x-frame-options: DENY\n' +
            'content-type: text/html; charset=utf-8\n' +
            'vary: Cookie, Accept-Encoding\n' +
            'keep-alive: timeout=5, max=1000\n' +
            'expires: Thu: , 19 Nov 1981 08:52:00 GMT\n');

        expect(parsed['date']).toBe('Thu, 04 Aug 2011 20:23:08 GMT');
        expect(parsed['content-encoding']).toBe('gzip');
        expect(parsed['transfer-encoding']).toBe('chunked');
        expect(parsed['keep-alive']).toBe('timeout=5, max=1000');
      });


      it('should parse lines without space after colon', function() {
        expect(parseHeaders('key:value').key).toBe('value');
      });


      it('should trim the values', function() {
        expect(parseHeaders('key:    value ').key).toBe('value');
      });


      it('should allow headers without value', function() {
        expect(parseHeaders('key:').key).toBe('');
      });


      it('should merge headers with same key', function() {
        expect(parseHeaders('key: a\nkey:b\n').key).toBe('a, b');
      });


      it('should normalize keys to lower case', function() {
        expect(parseHeaders('KeY: value').key).toBe('value');
      });


      it('should parse CRLF as delimiter', function() {
        // IE does use CRLF
        expect(parseHeaders('a: b\r\nc: d\r\n')).toEqual({a: 'b', c: 'd'});
        expect(parseHeaders('a: b\r\nc: d\r\n').a).toBe('b');
      });


      it('should parse tab after semi-colon', function() {
        expect(parseHeaders('a:\tbb').a).toBe('bb');
        expect(parseHeaders('a: \tbb').a).toBe('bb');
      });
    });


    describe('request headers', function() {

      it('should send custom headers', function() {
        $httpBackend.expect('GET', '/url', undefined, function(headers) {
          return headers['Custom'] == 'header';
        }).respond('');

        $http({url: '/url', method: 'GET', headers: {
          'Custom': 'header',
        }});

        $httpBackend.flush();
      });


      it('should set default headers for GET request', function() {
        $httpBackend.expect('GET', '/url', undefined, function(headers) {
          return headers['Accept'] == 'application/json, text/plain, */*' &&
                 headers['X-Requested-With'] == 'XMLHttpRequest';
        }).respond('');

        $http({url: '/url', method: 'GET', headers: {}});
        $httpBackend.flush();
      });


      it('should set default headers for POST request', function() {
        $httpBackend.expect('POST', '/url', 'messageBody', function(headers) {
          return headers['Accept'] == 'application/json, text/plain, */*' &&
                 headers['X-Requested-With'] == 'XMLHttpRequest' &&
                 headers['Content-Type'] == 'application/json;charset=utf-8';
        }).respond('');

        $http({url: '/url', method: 'POST', headers: {}, data: 'messageBody'});
        $httpBackend.flush();
      });


      it('should set default headers for PUT request', function() {
        $httpBackend.expect('PUT', '/url', 'messageBody', function(headers) {
          return headers['Accept'] == 'application/json, text/plain, */*' &&
                 headers['X-Requested-With'] == 'XMLHttpRequest' &&
                 headers['Content-Type'] == 'application/json;charset=utf-8';
        }).respond('');

        $http({url: '/url', method: 'PUT', headers: {}, data: 'messageBody'});
        $httpBackend.flush();
      });


      it('should set default headers for custom HTTP method', function() {
        $httpBackend.expect('FOO', '/url', undefined, function(headers) {
          return headers['Accept'] == 'application/json, text/plain, */*' &&
                 headers['X-Requested-With'] == 'XMLHttpRequest';
        }).respond('');

        $http({url: '/url', method: 'FOO', headers: {}});
        $httpBackend.flush();
      });


      it('should override default headers with custom', function() {
        $httpBackend.expect('POST', '/url', 'messageBody', function(headers) {
          return headers['Accept'] == 'Rewritten' &&
                 headers['X-Requested-With'] == 'XMLHttpRequest' &&
                 headers['Content-Type'] == 'Rewritten';
        }).respond('');

        $http({url: '/url', method: 'POST', data: 'messageBody', headers: {
          'Accept': 'Rewritten',
          'Content-Type': 'Rewritten'
        }});
        $httpBackend.flush();
      });


      it('should not send Content-Type header if request data/body is undefined', function() {
        $httpBackend.expect('POST', '/url', undefined, function(headers) {
          return !headers.hasOwnProperty('Content-Type');
        }).respond('');

        $http({url: '/url', method: 'POST'});
        $httpBackend.flush();
      });


      it('should set the XSRF cookie into a XSRF header', inject(function($browser) {
        function checkXSRF(secret) {
          return function(headers) {
            return headers['X-XSRF-TOKEN'] == secret;
          };
        }

        $browser.cookies('XSRF-TOKEN', 'secret');
        $httpBackend.expect('GET', '/url', undefined, checkXSRF('secret')).respond('');
        $httpBackend.expect('POST', '/url', undefined, checkXSRF('secret')).respond('');
        $httpBackend.expect('PUT', '/url', undefined, checkXSRF('secret')).respond('');
        $httpBackend.expect('DELETE', '/url', undefined, checkXSRF('secret')).respond('');

        $http({url: '/url', method: 'GET'});
        $http({url: '/url', method: 'POST', headers: {'S-ome': 'Header'}});
        $http({url: '/url', method: 'PUT', headers: {'Another': 'Header'}});
        $http({url: '/url', method: 'DELETE', headers: {}});

        $httpBackend.flush();
      }));
    });


    describe('short methods', function() {

      function checkHeader(name, value) {
        return function(headers) {
          return headers[name] == value;
        };
      }

      it('should have get()', function() {
        $httpBackend.expect('GET', '/url').respond('');
        $http.get('/url');
      });


      it('get() should allow config param', function() {
        $httpBackend.expect('GET', '/url', undefined, checkHeader('Custom', 'Header')).respond('');
        $http.get('/url', {headers: {'Custom': 'Header'}});
      });


      it('should have delete()', function() {
        $httpBackend.expect('DELETE', '/url').respond('');
        $http['delete']('/url');
      });


      it('delete() should allow config param', function() {
        $httpBackend.expect('DELETE', '/url', undefined, checkHeader('Custom', 'Header')).respond('');
        $http['delete']('/url', {headers: {'Custom': 'Header'}});
      });


      it('should have head()', function() {
        $httpBackend.expect('HEAD', '/url').respond('');
        $http.head('/url');
      });


      it('head() should allow config param', function() {
        $httpBackend.expect('HEAD', '/url', undefined, checkHeader('Custom', 'Header')).respond('');
        $http.head('/url', {headers: {'Custom': 'Header'}});
      });


      it('should have post()', function() {
        $httpBackend.expect('POST', '/url', 'some-data').respond('');
        $http.post('/url', 'some-data');
      });


      it('post() should allow config param', function() {
        $httpBackend.expect('POST', '/url', 'some-data', checkHeader('Custom', 'Header')).respond('');
        $http.post('/url', 'some-data', {headers: {'Custom': 'Header'}});
      });


      it('should have put()', function() {
        $httpBackend.expect('PUT', '/url', 'some-data').respond('');
        $http.put('/url', 'some-data');
      });


      it('put() should allow config param', function() {
        $httpBackend.expect('PUT', '/url', 'some-data', checkHeader('Custom', 'Header')).respond('');
        $http.put('/url', 'some-data', {headers: {'Custom': 'Header'}});
      });


      it('should have jsonp()', function() {
        $httpBackend.expect('JSONP', '/url').respond('');
        $http.jsonp('/url');
      });


      it('jsonp() should allow config param', function() {
        $httpBackend.expect('JSONP', '/url', undefined, checkHeader('Custom', 'Header')).respond('');
        $http.jsonp('/url', {headers: {'Custom': 'Header'}});
      });
    });


    describe('scope.$apply', function() {

      it('should $apply after success callback', function() {
        $httpBackend.when('GET').respond(200);
        $http({method: 'GET', url: '/some'});
        $httpBackend.flush();
        expect($rootScope.$apply).toHaveBeenCalledOnce();
      });


      it('should $apply after error callback', function() {
        $httpBackend.when('GET').respond(404);
        $http({method: 'GET', url: '/some'});
        $httpBackend.flush();
        expect($rootScope.$apply).toHaveBeenCalledOnce();
      });


      it('should $apply even if exception thrown during callback', inject(function($exceptionHandler){
        $httpBackend.when('GET').respond(200);
        callback.andThrow('error in callback');

        $http({method: 'GET', url: '/some'}).then(callback);
        $httpBackend.flush();
        expect($rootScope.$apply).toHaveBeenCalledOnce();

        $exceptionHandler.errors = [];
      }));
    });


    describe('transformData', function() {

      describe('request', function() {

        describe('default', function() {

          it('should transform object into json', function() {
            $httpBackend.expect('POST', '/url', '{"one":"two"}').respond('');
            $http({method: 'POST', url: '/url', data: {one: 'two'}});
          });


          it('should ignore strings', function() {
            $httpBackend.expect('POST', '/url', 'string-data').respond('');
            $http({method: 'POST', url: '/url', data: 'string-data'});
          });


          it('should ignore File objects', function() {
            var file = {
              some: true,
              // $httpBackend compares toJson values by default,
              // we need to be sure it's not serialized into json string
              test: function(actualValue) {
                return this === actualValue;
              }
            };

            // I'm really sorry for doing this :-D
            // Unfortunatelly I don't know how to trick toString.apply(obj) comparison
            spyOn(window, 'isFile').andReturn(true);

            $httpBackend.expect('POST', '/some', file).respond('');
            $http({method: 'POST', url: '/some', data: file});
          });
        });


        it('should have access to request headers', function() {
          $httpBackend.expect('POST', '/url', 'header1').respond(200);
          $http.post('/url', 'req', {
            headers: {h1: 'header1'},
            transformRequest: function(data, headers) {
              return headers('h1');
            }
          }).success(callback);
          $httpBackend.flush();

          expect(callback).toHaveBeenCalledOnce();
        });


        it('should pipeline more functions', function() {
          function first(d, h) {return d + '-first' + ':' + h('h1')}
          function second(d) {return uppercase(d)}

          $httpBackend.expect('POST', '/url', 'REQ-FIRST:V1').respond(200);
          $http.post('/url', 'req', {
            headers: {h1: 'v1'},
            transformRequest: [first, second]
          }).success(callback);
          $httpBackend.flush();

          expect(callback).toHaveBeenCalledOnce();
        });
      });


      describe('response', function() {

        describe('default', function() {

          it('should deserialize json objects', function() {
            $httpBackend.expect('GET', '/url').respond('{"foo":"bar","baz":23}');
            $http({method: 'GET', url: '/url'}).success(callback);
            $httpBackend.flush();

            expect(callback).toHaveBeenCalledOnce();
            expect(callback.mostRecentCall.args[0]).toEqual({foo: 'bar', baz: 23});
          });


          it('should deserialize json arrays', function() {
            $httpBackend.expect('GET', '/url').respond('[1, "abc", {"foo":"bar"}]');
            $http({method: 'GET', url: '/url'}).success(callback);
            $httpBackend.flush();

            expect(callback).toHaveBeenCalledOnce();
            expect(callback.mostRecentCall.args[0]).toEqual([1, 'abc', {foo: 'bar'}]);
          });


          it('should deserialize json with security prefix', function() {
            $httpBackend.expect('GET', '/url').respond(')]}\',\n[1, "abc", {"foo":"bar"}]');
            $http({method: 'GET', url: '/url'}).success(callback);
            $httpBackend.flush();

            expect(callback).toHaveBeenCalledOnce();
            expect(callback.mostRecentCall.args[0]).toEqual([1, 'abc', {foo:'bar'}]);
          });


          it('should deserialize json with security prefix ")]}\'"', function() {
            $httpBackend.expect('GET', '/url').respond(')]}\'\n\n[1, "abc", {"foo":"bar"}]');
            $http({method: 'GET', url: '/url'}).success(callback);
            $httpBackend.flush();

            expect(callback).toHaveBeenCalledOnce();
            expect(callback.mostRecentCall.args[0]).toEqual([1, 'abc', {foo:'bar'}]);
          });


          it('should not deserialize tpl beginning with ng expression', function() {
            $httpBackend.expect('GET', '/url').respond('{{some}}');
            $http.get('/url').success(callback);
            $httpBackend.flush();

            expect(callback).toHaveBeenCalledOnce();
            expect(callback.mostRecentCall.args[0]).toEqual('{{some}}');
          });
        });


        it('should have access to response headers', function() {
          $httpBackend.expect('GET', '/url').respond(200, 'response', {h1: 'header1'});
          $http.get('/url', {
            transformResponse: function(data, headers) {
              return headers('h1');
            }
          }).success(callback);
          $httpBackend.flush();

          expect(callback).toHaveBeenCalledOnce();
          expect(callback.mostRecentCall.args[0]).toBe('header1');
        });


        it('should pipeline more functions', function() {
          function first(d, h) {return d + '-first' + ':' + h('h1')}
          function second(d) {return uppercase(d)}

          $httpBackend.expect('POST', '/url').respond(200, 'resp', {h1: 'v1'});
          $http.post('/url', '', {transformResponse: [first, second]}).success(callback);
          $httpBackend.flush();

          expect(callback).toHaveBeenCalledOnce();
          expect(callback.mostRecentCall.args[0]).toBe('RESP-FIRST:V1');
        });
      });
    });


    describe('cache', function() {

      var cache;

      beforeEach(inject(function($cacheFactory) {
        cache = $cacheFactory('testCache');
      }));


      function doFirstCacheRequest(method, respStatus, headers) {
        $httpBackend.expect(method || 'GET', '/url').respond(respStatus || 200, 'content', headers);
        $http({method: method || 'GET', url: '/url', cache: cache});
        $httpBackend.flush();
      }


      it('should cache GET request when cache is provided', inject(function($rootScope) {
        doFirstCacheRequest();

        $http({method: 'get', url: '/url', cache: cache}).success(callback);
        $rootScope.$digest();

        expect(callback).toHaveBeenCalledOnce();
        expect(callback.mostRecentCall.args[0]).toBe('content');
      }));


      it('should not cache when cache is not provided', function() {
        doFirstCacheRequest();

        $httpBackend.expect('GET', '/url').respond();
        $http({method: 'GET', url: '/url'});
      });


      it('should perform request when cache cleared', function() {
        doFirstCacheRequest();

        cache.removeAll();
        $httpBackend.expect('GET', '/url').respond();
        $http({method: 'GET', url: '/url', cache: cache});
      });


      it('should always call callback asynchronously', function() {
        doFirstCacheRequest();
        $http({method: 'get', url: '/url', cache: cache}).then(callback);

        expect(callback).not.toHaveBeenCalled();
      });


      it('should not cache POST request', function() {
        doFirstCacheRequest('POST');

        $httpBackend.expect('POST', '/url').respond('content2');
        $http({method: 'POST', url: '/url', cache: cache}).success(callback);
        $httpBackend.flush();

        expect(callback).toHaveBeenCalledOnce();
        expect(callback.mostRecentCall.args[0]).toBe('content2');
      });


      it('should not cache PUT request', function() {
        doFirstCacheRequest('PUT');

        $httpBackend.expect('PUT', '/url').respond('content2');
        $http({method: 'PUT', url: '/url', cache: cache}).success(callback);
        $httpBackend.flush();

        expect(callback).toHaveBeenCalledOnce();
        expect(callback.mostRecentCall.args[0]).toBe('content2');
      });


      it('should not cache DELETE request', function() {
        doFirstCacheRequest('DELETE');

        $httpBackend.expect('DELETE', '/url').respond(206);
        $http({method: 'DELETE', url: '/url', cache: cache}).success(callback);
        $httpBackend.flush();

        expect(callback).toHaveBeenCalledOnce();
      });


      it('should not cache non 2xx responses', function() {
        doFirstCacheRequest('GET', 404);

        $httpBackend.expect('GET', '/url').respond('content2');
        $http({method: 'GET', url: '/url', cache: cache}).success(callback);
        $httpBackend.flush();

        expect(callback).toHaveBeenCalledOnce();
        expect(callback.mostRecentCall.args[0]).toBe('content2');
      });


      it('should cache the headers as well', inject(function($rootScope) {
        doFirstCacheRequest('GET', 200, {'content-encoding': 'gzip', 'server': 'Apache'});
        callback.andCallFake(function(r, s, headers) {
          expect(headers()).toEqual({'content-encoding': 'gzip', 'server': 'Apache'});
          expect(headers('server')).toBe('Apache');
        });

        $http({method: 'GET', url: '/url', cache: cache}).success(callback);
        $rootScope.$digest();
        expect(callback).toHaveBeenCalledOnce();
      }));


      it('should not share the cached headers object instance', inject(function($rootScope) {
        doFirstCacheRequest('GET', 200, {'content-encoding': 'gzip', 'server': 'Apache'});
        callback.andCallFake(function(r, s, headers) {
          expect(headers()).toEqual(cache.get('/url')[2]);
          expect(headers()).not.toBe(cache.get('/url')[2]);
        });

        $http({method: 'GET', url: '/url', cache: cache}).success(callback);
        $rootScope.$digest();
        expect(callback).toHaveBeenCalledOnce();
      }));


      it('should cache status code as well', inject(function($rootScope) {
        doFirstCacheRequest('GET', 201);
        callback.andCallFake(function(r, status, h) {
          expect(status).toBe(201);
        });

        $http({method: 'get', url: '/url', cache: cache}).success(callback);
        $rootScope.$digest();
        expect(callback).toHaveBeenCalledOnce();
      }));


      it('should use cache even if second request was made before the first returned', function() {
        $httpBackend.expect('GET', '/url').respond(201, 'fake-response');

        callback.andCallFake(function(response, status, headers) {
          expect(response).toBe('fake-response');
          expect(status).toBe(201);
        });

        $http({method: 'GET', url: '/url', cache: cache}).success(callback);
        $http({method: 'GET', url: '/url', cache: cache}).success(callback);

        $httpBackend.flush();
        expect(callback).toHaveBeenCalled();
        expect(callback.callCount).toBe(2);
      });


      it('should default to status code 200 and empty headers if cache contains a non-array element',
          inject(function($rootScope) {
            cache.put('/myurl', 'simple response');
            $http.get('/myurl', {cache: cache}).success(function(data, status, headers) {
              expect(data).toBe('simple response');
              expect(status).toBe(200);
              expect(headers()).toEqual({});
              callback();
            });

            $rootScope.$digest();
            expect(callback).toHaveBeenCalledOnce();
          })
      );
    });


    describe('pendingRequests', function() {

      it('should be an array of pending requests', function() {
        $httpBackend.when('GET').respond(200);
        expect($http.pendingRequests.length).toBe(0);

        $http({method: 'get', url: '/some'});
        expect($http.pendingRequests.length).toBe(1);

        $httpBackend.flush();
        expect($http.pendingRequests.length).toBe(0);
      });


      it('should update pending requests even when served from cache', inject(function($rootScope) {
        $httpBackend.when('GET').respond(200);

        $http({method: 'get', url: '/cached', cache: true});
        $http({method: 'get', url: '/cached', cache: true});
        expect($http.pendingRequests.length).toBe(2);

        $httpBackend.flush();
        expect($http.pendingRequests.length).toBe(0);

        $http({method: 'get', url: '/cached', cache: true});
        expect($http.pendingRequests.length).toBe(1);

        $rootScope.$apply();
        expect($http.pendingRequests.length).toBe(0);
      }));


      it('should remove the request before firing callbacks', function() {
        $httpBackend.when('GET').respond(200);
        $http({method: 'get', url: '/url'}).success(function() {
          expect($http.pendingRequests.length).toBe(0);
        });

        expect($http.pendingRequests.length).toBe(1);
        $httpBackend.flush();
      });
    });


    describe('defaults', function() {

      it('should expose the defaults object at runtime', function() {
        expect($http.defaults).toBeDefined();

        $http.defaults.headers.common.foo = 'bar';
        $httpBackend.expect('GET', '/url', undefined, function(headers) {
          return headers['foo'] == 'bar';
        }).respond('');

        $http.get('/url');
        $httpBackend.flush();
      });
    });
  });


  it('should pass timeout and withCredentials', function() {
    var $httpBackend = jasmine.createSpy('$httpBackend');

    $httpBackend.andCallFake(function(m, u, d, c, h, timeout, withCredentials) {
      expect(timeout).toBe(12345);
      expect(withCredentials).toBe(true);
    });

    module(function($provide) {
      $provide.value('$httpBackend', $httpBackend);
    });

    inject(function($http) {
      $http({method: 'GET', url: 'some.html', timeout: 12345, withCredentials: true});
      expect($httpBackend).toHaveBeenCalledOnce();
    });

    $httpBackend.verifyNoOutstandingExpectation = noop;
  });


  it('should abort pending requests', function() {
    var $httpBackend = jasmine.createSpy('$httpBackend');
    var abortFn = jasmine.createSpy('abortFn');

    $httpBackend.andCallFake(function(m, u, d, callback) {
      abortFn.andCallFake(function() {
        callback(-1, 'bad error', '');
      });
      return abortFn;
    });

    module(function($provide) {
      $provide.value('$httpBackend', $httpBackend, '');
    });

    inject(function($http) {
      $http({method: 'GET', url: 'some.html'}).error(function(data, status, headers, config) {
        expect(data).toBe('bad error');
        expect(status).toBe(0);
        expect(headers()).toEqual({});
        expect(config.url).toBe('some.html');
        callback();
      }).abort();
      expect($httpBackend).toHaveBeenCalledOnce();
      expect(abortFn).toHaveBeenCalledOnce();
      expect(callback).toHaveBeenCalledOnce();
    });

    $httpBackend.verifyNoOutstandingExpectation = noop;
  });
});