Angular test failure: Receiving $injector:unpr Unknown Provider error despite having no dependencies

Encountering this specific error, where my injector seems to have trouble resolving a necessary dependency. Even with my limited understanding of Angular, it doesn't seem like this code should rely on any external modules.

The code functions properly in the browser but fails during testing. I've been following the examples provided in the documentation.

Running Angular version 1.2.13 (updated to 1.12.15).

Snippet of the code:

var app = angular.module('app', [])

.controller('GreetingCtrl', function ($scope) {
  $scope.title = "Hello World!";
  $scope.message = "Test, test. One? Two?";
});

Below is the failing Jasmine test.

describe('app controllers', function () {
  beforeEach(module('app'));

  describe('GreetingCtrl', function () {
    it('should says hello world', inject(function ($controller) {
      var $scope = {};
      $controller('GreetingCtrl', $scope);
      expect($scope.title).toBe("Hello World!");
    }));
  });
});

I suspect the failure occurs before the test even runs. The file concatenation also seems correct. The jasmine test runner provides this error message:

Error: [$injector:unpr] http://errors.angularjs.org/1.2.13/$injector/unpr?p0=%24scopeProvider%20%3C-%20%24scope (line 4569) (1)

Edit: attempted upgrade to 1.12.15, issue remains unchanged.

Answer №1

After a brief discussion in the IRC, it turns out that the documentation might be outdated, but I found a working solution. Someone pointed me to this solution, and I adjusted my test accordingly.

describe('app controllers', function () {
  var ctrl, scope;

  beforeEach(module('app'));

  describe('GreetingCtrl', function () {
    beforeEach(inject(function ($rootScope, $controller) {
      scope = $rootScope.$new();
      ctrl = $controller('GreetingCtrl', {$scope: scope});
    }));

    it('should say hello world', function () {
      expect(scope.title).toBe("Hello World!");
    });
  });
});

Edit:

It was my mistake for misinterpreting the docs initially, but here is a cleaner solution that aligns better with the documentation.

describe('app controllers', function () {
  beforeEach(module('app'));

  describe('GreetingCtrl', function () {
    it('should say hello world', inject(function ($controller) {
      var $scope = {};
      // this is the line that gave me trouble
      $controller('GreetingCtrl', { $scope: $scope }); 
      expect($scope.title).toBe("Hello World!");
    }));
  });
});

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