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superhuman-karma-webpack

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superhuman-karma-webpack

Use webpack with karma

  • 1.7.1
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karma-webpack

Installation

npm install --save-dev karma-webpack

Usage

// Karma configuration

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

		files: [
			// all files ending in "_test"
			'test/*_test.js',
			'test/**/*_test.js'
			// each file acts as entry point for the webpack configuration
		],

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

		webpack: {
			// karma watches the test entry points
			// (you don't need to specify the entry option)
			// webpack watches dependencies

			// webpack configuration
		},

		webpackMiddleware: {
			// webpack-dev-middleware configuration
			// i. e.
			noInfo: true
		}
	});
};

Alternative usage

This configuration is more performant, but you cannot run single test anymore (only the complete suite).

The above configuration generates a webpack bundle for each test. For many testcases this can result in many big files. The alterative configuration creates a single bundle with all testcases.

		files: [
			// only specify one entry point
			// and require all tests in there
			'test/test_index.js'
		],

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

// require all modules ending in "_test" from the
// current directory and all subdirectories
var testsContext = require.context(".", true, /_test$/);
testsContext.keys().forEach(testsContext);

Every test file is required using the require.context and compiled with webpack into one test bundle.

Source Maps

You can use the karma-sourcemap-loader to get the source maps generated for your test bundle.

npm install --save-dev karma-sourcemap-loader

And then add it to your preprocessors

preprocessors: {
	'test/test_index.js': ['webpack', 'sourcemap']
}

And tell webpack to generate sourcemaps

webpack: {
  // ...
	devtool: 'inline-source-map'
}

Options

This is the full list of options you can specify in your Karma config.

webpack

Webpack configuration.

webpackMiddleware

Configuration for webpack-dev-middleware.

License

Copyright 2014-2015 Tobias Koppers

MIT

FAQs

Package last updated on 30 May 2016

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