UI-Bootstrapのmodalのテストで、$modalInstanceを使うControllerをテストしようとして、$modalInstanceをinjectしようとするところでUnknown providerとエラーが出る

JavaScript

公式のサンプルでいうと、ModalInstanceCtrl部分のテスト。

// modal-demo.js
var ModalDemoCtrl = function ($scope, $modal, $log) {

  $scope.items = ['item1', 'item2', 'item3'];

  $scope.open = function (size) {

    var modalInstance = $modal.open({
      templateUrl: 'myModalContent.html',
      controller: ModalInstanceCtrl,
      size: size,
      resolve: {
        items: function () {
          return $scope.items;
        }
      }
    });

    modalInstance.result.then(function (selectedItem) {
      $scope.selected = selectedItem;
    }, function () {
      $log.info('Modal dismissed at: ' + new Date());
    });
  };
};

// Please note that $modalInstance represents a modal window (instance) dependency.
// It is not the same as the $modal service used above.

var ModalInstanceCtrl = function ($scope, $modalInstance, items) {

  $scope.items = items;
  $scope.selected = {
    item: $scope.items[0]
  };

  $scope.ok = function () {
    $modalInstance.close($scope.selected.item);
  };

  $scope.cancel = function () {
    $modalInstance.dismiss('cancel');
  };
};

beforeEachで$modalInstanceをinjectしようとしているところで

#modal_instance_spec.coffee
"use strict"

describe "Controller: ModalInstanceCtrl", ->

  # load the controller"s module
  beforeEach module "myApp"

  ModalInstanceCtrl = {}
  scope = {}
  modalInstance = {}
  httpBackend = {}
  
  # Initialize the controller and a mock scope
  beforeEach inject ($controller, $rootScope, _$httpBackend_,_$modalInstance_) ->
    scope = $rootScope.$new()

こんなエラー

Error: [$injector:unpr] Unknown provider: $modalInstanceProvider <- $modalInstance

こんなときはmodalInstanceをmockにしてしまえばOK.

#modal_instance_spec.coffee
"use strict"

describe "Controller: ModalInstanceCtrl", ->

  # load the controller"s module
  beforeEach module "myApp"

  ModalInstanceCtrl = {}
  scope = {}
  modalInstance = {}
  httpBackend = {}
  
  # Initialize the controller and a mock scope
  beforeEach inject ($controller, $rootScope, _$httpBackend_) ->
    scope = $rootScope.$new()
    httpBackend = _$httpBackend_
    modalInstance =
      close: jasmine.createSpy("modalInstance.close")
      dismiss: jasmine.createSpy("modalInstance.dismiss")
      result: 
        then: jasmine.createSpy('modalInstance.result.then')

    ModalInstanceCtrl = $controller "ModalInstanceCtrl", {
      $scope: scope
      $modalInstance: modalInstance
    }

  it "cancelを呼ぶと、modalをdismissすること", ->
    scope.cancel()
    expect(modalInstance.dismiss).toHaveBeenCalled()
#........

参考というかそのまま