In karma configuration file (karma.conf.js) you need to define all libraries.
etc.
// list of files / patterns to load in the browser
files: [
'app/lib/angular/angular.js',
'app/lib/angular-route/angular-route.js',
'test/lib/angular-mocks.js',
'app/app.js',
'app/controllers/*.js',
'app/services/*.js',
'app/*',
'test/spec/**/*.js'
],