karma.conf.js

module.exports = function (config) {
    config.set({
        angularCli: {
            environment: 'dev'
        },
        browsers: ['Chrome'],
        frameworks: ['jasmine', 'karma-typescript'],
        plugins: [
            require('karma-jasmine'),
            require('karma-typescript'),
            require('karma-chrome-launcher'),
            require('@angular-devkit/build-angular')
        ],
        files: [
            'src/**/*.spec.ts'
        ],
        preprocessors: {
            "src/**/*.ts": "karma-typescript" // *.ts
        },
        reporters: ["progress", "karma-typescript"],
        karmaTypescriptConfig: {
            compilerOptions: {
                target: "ES2015",
                lib: ["es2015", "es2017", "dom"]
            },
            tsconfig: "tsconfig.json"
        }
    });
};