单元测试具有依赖性的角度服务

Question

I have the following Jasmine unit test:

describe('myService', function () {
    var myService, $q;

    // Instantiate the app
    beforeEach(module('myApp'));

    beforeEach(inject(function (_myService_, fileSystemService, $q) {
        myService = _myService_;
        spyOn(fileSystemService, 'listFiles').and.callFake(function () {
            var deferred = $q.defer();
            deferred.resolve('mockresult');
            return deferred.promise;
        });
    }));

    it('checks the number of outbound files', inject(function ($rootScope) {
        var result;
        myService.sendOutboundFiles2().then(function (res) {
            result = res;
        });
        $rootScope.$digest();
        expect(result).toBe('mockresult');
    }));
});

Which tests this very simple service function:

sendOutboundFiles2() {
     return fileSystemService.listFiles('Cached/Outbound').then(function(outfiles) {
         return outfiles;
     })
}

However when the test runs, it fails with a spurious Error: Unexpected request: GET blah\\blah\\blah.html No more request expected at $httpBackend error but i have no idea why as neither this test nor the service dependencies do anything with $httpBackend.

MORE INFO

If i comment out my existing controller tests, I get this error:

If i add my controller tests back in, I get this error:

So depending on which tests i add or remove, the HTML file in the GET error changes. But all the controller tests run fine. WTF?!?!?!!??!?!!?

Answer 1

The problem is caused by Ionic's keen prefetching of all templates into a cache. No idea why this doesn't occur when testing a controller though. The problem only appears when i was testing a service. Any way, I found this thread: Karma test breaks after using ui-router and the relevant fix is to add this snippets before injecting any dependencies:

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

This stubs out the $ionicTemplateCache and prevents it from trying to preload all ui-router templates into the Ionic cache.