karma test runner not running any tests

Question

I\'m using karma with jasmine and followed online guide by installing using

npm install --save-dev karma

and other necessities

i ran

Answer 1

Following configuration works for me -

 reporters: ['progress', 'kjhtml'],
        port: 9876,
        colors: true,
        logLevel: config.LOG_INFO, // config.LOG_DEBUG,
        autoWatch: true,
        browsers: ['ChromeNS'],
        singleRun: false,
        customLaunchers: {
            ChromeHeadlessNS: {
                base: 'ChromeHeadless',
                flags: ['--no-sandbox', '--disable-gpu']
            },
            ChromeNS: {
                base: 'Chrome',
                flags: ['--no-sandbox', '--disable-gpu']
            }
        }

Answer 2

Under karma.config.js, set either singleRun or autoWatch to true. In your case both of them are set to false, hence karma is not running the tests.

singleRun: If true, it captures browsers, runs tests and exits with 0 exit code (if all tests passed) or 1 exit code (if any test failed).

singleRun: true

autoWatch: Enable or disable watching files and executing the tests whenever one of these files changes. Incase you want to watch your files.

autoWatch: true

Answer 3

Simple but sometimes overlooked cause: ensure you don't have syntax or compilation errors.

If running a Karma test for JavaScript via your IDE, you may have a syntax error which doesn't appear when you run your tests. This leads to Karma issuing the message "no tests were found".

I ran it under WebStorm; the error appeared under the "Karma Server" tab, while the "No tests were found" message appeared under "Test Run" (both tabs under "Run" or "Debug" tool window).