Karma Jasmine: Executed 0 of 0 Error - angularjs

Question

I am getting into Angular Testing with Karma and Jasmine. After doing the karma init and writing the first test for a home controller, I keep getting Executed 0 of 0 ERROR. It does not seem like it's being picked up in the files.
module.exports = function(config) {
config.set({
basePath: '',
frameworks: ['jasmine'],
files: [
'public/assets/libs/angular/angular.min.js',
'bower_components/angular-mocks/angular-mocks.js',
'public/app/app.module.js',
'public/app/app.config.js',
'public/app/**/*.js',
'test/unit/**/*.spec.js'
],
exclude: [
],
preprocessors: {
},
reporters: ['progress'],
port: 3030,
colors: true,
logLevel: config.LOG_INFO,
autoWatch: true,
browsers: ['Chrome'],
singleRun: false
}); //config.set
} //module.export
The test (fixed)
describe('HomeController', function() {
//Inject 'app' module into this spec.
beforeEach(module('app'));
//Inject instance of Scope.
var homeController;
beforeEach(inject(function($rootScope, $controller) {
//create a new scope
scope = $rootScope.$new();
//create new controller, using the newly created scope
HomeController = $controller('HomeController', {
$scope: scope
});
}));
//Set expectations
it('the message should say Hello World', function(HomeController) {
expect(scope.message).toBe('Hello World');
});
});
And the HomeController:
(function() {
'use strict';
angular
.module('app')
.controller('HomeController', HomeController);
HomeController.$inject = ['$scope', '$log'];
function HomeController($scope, $log) {
/*jshint validthis: true*/
var vm = this;
vm.message = 'Hello World';
} //HomeController()
})(); //Controller
Thanks for helping.

Answer 1

I figured it out. The test it('...') was inside the beforeEach() block, so there were 0 tests. It is now in it's own separate block, below.

Answer 2

To all those also experiencing the "Executed 0 of 0 ERROR" issue:
Here is how to better debug this error since the log message in the command line might be truncated or not helpful enough:
In the Browser instance of karma (e.g. Chrome), set a breakpoint in karma.js in the following function:
this.error = function (msg, url, line) {
Since the string representation of the msg that will be transported to the command line log is not very helpful, analyze it here.

Answer 3

Had the same problem testing typescript - I found the problem in the chrome console:
Refused to execute script from 'xxx' because its MIME type ('video/mp2t') is not executable.
The fix turned out to be adding
mime: {
'text/x-typescript': ['ts', 'tsx']
}
into karma.conf.js.