karma-webpack

// Karma configuration

module.exports = function(config) {
	config.set({
		// ... normal karma configuration

		// add webpack as preprocessor
		preprocessors: {
			'test/*Test.js': ['webpack']
		},

		webpack: {
			cache: true,
			// webpack configuration
		},

		webpackServer: {
			// webpack-dev-server configuration
			// webpack-dev-middleware configuration
		},

		// the port used by the webpack-dev-server
		// defaults to "config.port" + 1
		webpackPort: 1234,

		plugins: [
			require("karma-webpack")
		}

	});
};

Every test file is compiled with webpack and the resulting bundle is served.

Lisence

Copyright 2014 Tobias Koppers

MIT