AngularJS + Karma + Ng-html2js => Failed to instantiate module ...html

Question

I can't make Karma working for directives that have external templates.

Here is my karma configuration file :

preprocessors: {
    'directives/loading/templates/loading.html': 'ng-html2js'
},

files: [
    ...
    'directives/loading/templates/loading.html',
]

ngHtml2JsPreprocessor: {
    prependPrefix: '/app/'
},

In the directive file :

...
templateUrl: '/app/directives/loading/templates/loading.html'
...

In the spec file :

describe('Loading directive', function() {
    ...
    beforeEach(module('/app/directives/loading/templates/loading.html'));
    ...
});

I get the following error :

Failed to instantiate module /app/directives/loading/templates/loading.html due to: Error: No module: /app/directives/loading/templates/loading.html

If I modify the source code of the karma-ng-html2js-preprocessor to print the result of the generated file, I get :

angular.module('/app/directives/loading/templates/loading.html', []).run(function($templateCache) {
    $templateCache.put('/app/directives/loading/templates/loading.html',
        '<div ng-hide="hideLoading" class="loading_panel">\n' +
        '   <div class="center">\n' +
        '       <div class="content">\n' +
        '           <span ng-transclude></span>\n' +
        '           <canvas width="32" height="32"></canvas>\n' +
        '       </div>\n' +
        '   </div>\n' +
    '</div>');
});

So it seems that the generated JS file is correct but not loaded by karma...

Also, if I use --log-level debug, here are the lines related to the template :

DEBUG [preprocessor.html2js]: Processing "/home/rightink/public_html/bo2/master/web/app/directives/loading/templates/loading.html"

DEBUG [watcher]: Resolved files:

      /correct/path/to/the/app/directives/loading/templates/loading.html.js

Am I missing something ?

Thanks,

Answer 1

The problem may be that relative paths specified in file section get expanded to full ones.

Something like directives/loading/templates/loading.html => /home/joe/project/angular-app/directives/loading/templates/loading.html

... and then, templates get registered with theirs full paths.

The solution is to configure the ng-html2js preprocessor to remove the absolute part of the template paths. For instance, in the karma.conf.js file add the stripPrefix directive like this :

ngHtml2JsPreprocessor: {
    // strip this from the file path
    stripPrefix: '.*/project/angular-app/'
    prependPrefix: '/app/'
}

Note that stripPrefix is a regexp.