角度与茉莉花错误：指令所需的控制器找不到

Question

I have an application which has two directives, where one directive requires the other. I have replicated it to mirror the base of the application:

var module = angular.module('testApp', ['testApp.directiveA', 'testApp.directiveB']);

// Here goes your modules definition
module.controller('AppCtrl', function ($scope, $log) {
});

angular.module('testApp.directiveA', ['testApp.directiveB'])

.directive('directiveA', function () {
    return {
        restrict: 'EA',
    require: '^directiveB',
        template: '<div><h1>DirectiveA</h1></div>',
    scope: {
      value: "@"
    },
        link: function (scope, element, attrs, directiveBCtrl) {
            scope.testFunction = function() {
                return directiveBCtrl.exampleFunction();
            };

            scope.value = scope.testFunction();
        }
    }
});

angular.module('testApp.directiveB', [])

.directive('directiveB', function () {
    return {
        restrict: 'EA',
        template: '<div><h1>DirectiveB</h1></div>',
    scope: {
      value: "@"
    },
        controller: function ($scope) {
            $scope.exampleFunction = function() {
                return true;
            };
        }
    }
});

I am trying to write a test using Jasmine to test different functions in directiveA:

describe('Test directive with require', function () {

    var $scope, elem, scope;

    beforeEach(angular.mock.module("testApp.directiveA", "testApp.directiveB"));

    beforeEach(inject(function ($rootScope, $compile) {

        elem = angular.element('<directive-a value="aValue"></directive-a>');

        $scope = $rootScope.$new();

        $compile(elem)($scope);

        $scope.$digest();

        scope = elem.isolateScope();

    }));

    it('Should test a function on directiveA', function() {

        var result = scope.testFunction();
        expect(result).toEqual(true);
    });
});

When I run this, I get the error:

Controller 'directiveB', required by directive 'directiveA', can't be found!

I have setup A Plnkr which reproduces the error. I cannot seem to figure out how I can inject one directive, or rather its controller, into the other directive. Any help is greatly appreciate.

http://plnkr.co/edit/pKDNkiO1ZHxE6qQKXXF5?p=preview

Answer 1

Here's an updated jasmine beforeEach code (or plunker ):

beforeEach(inject(function($rootScope, $compile) {
    elem = angular.element('<directive-b><directive-a value="aValue"></directive-a></directive-b>');
    $scope = $rootScope.$new();
    $compile(elem)($scope);
    $scope.$digest();
    scope = elem.children(':first').isolateScope();
}));

And updated directiveB code:

directive('directiveB', function() {
    return {
        restrict: 'EA',
        //template: '<div><h1>DirectiveB</h1></div>',
        scope: {
            value: "@"
        },
        controller: function($scope) {
            this.exampleFunction = function() {
                return true;
            };
        }
    }
});

Takeaway:

1. Wrap your directive into required directive and get its scope with elem.children(':first').isolateScope()
2. Required directive shouldn't have a template, otherwise it will override your directive indside
3. Use this to create controller methods instead of $scope

UPD:

You can use transclude if your parent directive needs to have a template. Here is a pluker .