karma.conf.js

module.exports = function (config) {
    config.set({
        plugins: [
            'karma-webpack',
            'karma-jasmine',
            'karma-chrome-launcher'
        ],

        webpack: {
            resolve: {
                fallback: { "crypto": false },
                extensions: ['.js', '.ts', '.json']
            },
            module: {
                rules: [
                    {
                        test: /\.ts$/,
                        use: 'ts-loader'
                    },
                ],
            }
            // Your webpack config here
        },

        // base path that will be used to resolve all patterns (eg. files, exclude)
        basePath: '',

        // frameworks to use
        // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
        frameworks: ['jasmine'],

        // list of files / patterns to load in the browser
        // Here I'm including all of the the Jest tests which are all under the __tests__ directory.
        // You may need to tweak this patter to find your test files/
        files: ['./karma.setup.js', 'src/**/*.ts'],

        browsers: ['ChromeHeadless'],

        // preprocess matching files before serving them to the browser
        // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
        preprocessors: {
            './karma.setup.js': ['webpack'],
            'src/**/*.ts': ['webpack'],
        },
    });
};