A Karma preprocessor and server handler for serving gzipped test assets.
Particularly handy when working with large test bundles and remote browser-cloud services like Browserstack or Saucelabs.
The easiest way is to keep karma-coverage as a devDependency in your package.json.
npm install karma-gzip --save-dev
// karma.conf.js
module.exports = function(config) {
config.set({
// We need to add some extra server middleware so that we can correctly
// serve gzipped files
plugins: [ 'karma-gzip' ],
frameworks: [ 'gzip' ],
files: [
'src/**/*.js',
'test/**/*.js'
],
preprocessors: {
// Only files marked for gzip preprocessing will be compressed.
'test/large_test_bundle.js': [ 'gzip' ],
'test/test_helper.coffee': [ 'coffee', 'gzip' ]
}
});
};You can tell that your assets are being gzipped when you see output something like the following:
$ karma start --log-level=debug
INFO [preprocessor.gzip]: compressed /MyProject/test/test_helper.js [2MB -> 437KB]
INFO [preprocessor.gzip]: compressed /MyProject/test/test_index.js [5MB -> 1MB]
DEBUG [gzip-plugin]: serving (gzip): /MyProject/test/test_helper.js
DEBUG [gzip-plugin]: serving (gzip): /MyProject/test/test_index.js