Package Exports

karma-webpack

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (karma-webpack) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

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
        },

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

    });
};

Alternative usage

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

The above configuration generate 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

MIT