galaxy/client/karma/webpack.config.unittest.js

/**
 * Unit tests should not require css or images, so replace all those things with
 * the ignore-loader for speedier testing.
 */

const merge = require("webpack-merge");
const wpConfig = require("../webpack.config");

wpConfig.mode = "development";
wpConfig.entry = () => ({});


// Don't need any assets for unit testing

let ignoreAssetLoaders = {
    rules:[
        {
            test: /\.(png|jpg|jpeg|gif|svg|woff|woff2|ttf|eot)(\?.*$|$)/,
            loader: "ignore-loader"
        },
        {
            test: /\.css$/,
            loader: "ignore-loader"
        },
        {
            test: /\.scss$/,
            loader: "ignore-loader"
        }
    ]
};

wpConfig.module = merge.smart(wpConfig.module, ignoreAssetLoaders);


// Using babel-plugin-rewire to handle dependency mocking since webpack 4
// exports immutable bindings for ES modules but we still need a way to
// overwrite dependencies during unit-testing.

wpConfig.module.rules = wpConfig.module.rules.map(rule => {
    if (rule.loader == "babel-loader") {
        rule.options.plugins.push("rewire");
    }
    return rule;
});


module.exports = wpConfig;