Issue running karma task from gulp

Question

I am trying to run karma tests from gulp task and I am getting this error:

Error: 1
   at formatError (C:\\Users\\Tim\\AppData\\Roaming\\npm\\node_modules\\g         


        

Answer 1

How are you running your tests with Gulp? I came up against this issue recently on OSX, running node v0.11.14 and gulp 3.8.10, whenever there were failing tests.

Changing from the recommended:

gulp.task('test', function(done) {
    karma.start({
        configFile: __dirname + '/karma.conf.js',
        singleRun: true
    }, done);
});

To:

gulp.task('test', function(done) {
    karma.start({
        configFile: __dirname + '/karma.conf.js',
        singleRun: true
    }, function() {
        done();
    });
});

...got rid of this error.

Seems to be down to how gulp handles error messages when an error is signalled in a callback. See Improve error messages on exit for more information.