The ng-isolate-scope is not properly connected to the specified templateUrl

I am encountering difficulties when trying to implement isolated scope with templateUrl.

Here is my directive test:

beforeEach(ngModule('app.directives'));
  var scope, compile
  beforeEach(inject(function($rootScope, $compile){
    scope = $rootScope.$new();
    compile = $compile;
  }));

  it('Substitutes the element with the correct content', function(){
    var element = compile('<download-detail-header></download-detail-header>')(scope);
    expect(element.html()).to.equal('<p>Hello World!</p>');
  });

This is my directive:

function downloadDetailHeader() {
  return {
    restrict: 'EA',
    scope: {},
    template: '<p>Hello World!</p>'
    // templateUrl: 'download_detail_header/views/downloadHeader.html'
  }
}

Contents of downloadHeader.html file:

<p>Hello World!</p>

The test successfully runs with the template, since ng-isolate-scope is added as a class on the directive element. However, the test fails when using the provided templateUrl, as no ng-isolate-scope is assigned to the directive element.

Can anyone offer any insights into this problem?

Answer №1

According to @Claies, referencing a template file in an Angular directive requires fetching it first. Compilation and linking are deferred until the template is loaded, so your test may be evaluating before the template is fetched.

To avoid this issue, you can either include the template in a script tag or manually cache it using $templateCache.put() before running your test.

beforeEach(ngModule('app.directives'));
  var scope, compile
  beforeEach(inject(function($rootScope, $compile, $templateCache){
    scope = $rootScope.$new();
    compile = $compile;
    $templateCache.put('downloadHeader.html', '<p>Hello World!</p>');
  }));

  it('Replaces the element with the appropriate content', function(){
    var element = compile('<download-detail-header></download-detail-header>')(scope);
    expect(element.html()).to.equal('<p>Hello World!</p>');
  });

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