Understanding how to effectively conduct unit tests on the 'resolve' property within an Angular-UI Bootstrap Modal component is essential for ensuring the functionality and

I'm currently working on building a unit test that verifies the correct variable is being passed to the resolve property within the ui.bootstrap.modal from Angular-UI Bootstrap components. Here's my progress so far:

// Controller
angular.module('app')
  .controller('WorkflowListCtrl', function ($scope, $modal) {
    // Setting up an edit callback to open a modal
    $scope.edit = function(name) {
      var modalInstance = $modal.open({
        templateUrl: 'partials/editWorkflowModal.html',
        controller: 'WorkflowEditCtrl',
        scope: $scope,
        resolve: {
          name: function() { return name; }
        }
      });
    };
  });

An important detail is that the resolve.name property must be a function for the Angular-UI component to function correctly - I had previously attempted resolve: { name: name } but it didn't produce the desired outcome.

// Unit Test
describe('Controller: WorkflowListCtrl', function () {

  // Loading the controller's module
  beforeEach(module('app'));

  var workflowListCtrl,
    scope,
    modal;

  // Initializing the controller and creating a mock scope
  beforeEach(inject(function ($controller, $rootScope) {

    scope = $rootScope.$new();
    modal = {
      open: jasmine.createSpy()
    };

    workflowListCtrl = $controller('WorkflowListCtrl', {
      $scope: scope,
      $modal: modal
    });

    it('should allow a workflow to be edited', function() {
      // Editing workflow triggers a modal.
      scope.edit('Barney Rubble');
      expect(modal.open).toHaveBeenCalledWith({
        templateUrl: 'partials/editWorkflowModal.html',
        controller: 'WorkflowEditCtrl',
        scope: scope,
        resolve: {
          name: jasmine.any(Function)
        }
      });
    });
  }));
});

Currently, the test validates that the resolve.name property is a function, but ideally, I would like to confirm that the resolve.name function indeed returns Barney Rubble. However, this syntax doesn't yield the expected result:

expect(modal.open).toHaveBeenCalledWith({
  templateUrl: 'partials/editWorkflowModal.html',
  controller: 'WorkflowEditCtrl',
  scope: scope,
  resolve: {
    name: function() { return 'Barney Rubble'; }
  }
});

It appears that I need to somehow spy on the resolve.name function to ensure it was invoked with Barney Rubble, but I'm struggling to find a solution. Any suggestions?

Answer №1

I have discovered a solution for this issue.

Create a 'private' function within the $scope:

$scope._resolve = function(item) {
  return function() {
    return item;
  };
};

Adjust the original $scope function to utilize this 'private' method:

$scope.edit = function(name) {
  var modalInstance = $modal.open({
    templateUrl: 'partials/modal.html',
    controller: 'ModalCtrl',
    scope: $scope,
    resolve: {
      name: $scope._resolve(name)
    }
  });
};

Update your tests to mock this function and ensure the original value is returned, allowing you to verify that it was passed correctly.

it('should allow a workflow to be edited', function() {
  // Mock the resolve fn and return the item
  spyOn($scope, '_resolve').and.callFake(function(item) {
    return item;
  });

  // Editing workflow occurs in a modal.
  scope.edit('Barney Rubble');
  expect(modal.open).toHaveBeenCalledWith({
    templateUrl: 'partials/modal.html',
    controller: 'ModalCtrl',
    scope: scope,
    resolve: {
      name: 'Barney Rubble'
    }
  });
});

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