karma.conf.ts

// eslint-disable-next-line unicorn/prefer-module
module.exports = (cfg) => {
  cfg.set({
    browsers: ['ChromeHeadless'],

    singleRun: true,
    autoWatch: false,

    frameworks: ['jasmine', 'karma-typescript'],
    reporters: ['progress', 'karma-typescript'],
    preprocessors: {
      '**/*.ts': 'karma-typescript',
      '**/*.tsx': 'karma-typescript',
    },

    files: ['./src/**/*.ts', './src/**/*.tsx', './tests/**/*.spec.ts', './tests/**/*.spec.tsx'],

    client: {
      jasmine: {
        random: false,
      },
    },

    karmaTypescriptConfig: {
      bundlerOptions: {
        constants: {
          'process.env': {
            NODE_ENV: 'production',
          },
        },
      },
      compilerOptions: {
        target: 'es2017',
        module: 'commonjs',
        moduleResolution: 'node',
        jsx: 'react',
        lib: ['dom', 'es2017'],
      },
      coverageOptions: {
        exclude: /(node_modules|tests|spec)/i,
      },
      reports: {
        lcovonly: {
          directory: './coverage',
          subdirectory: () => '',
          filename: 'lcov.info',
        },
        html: {
          directory: './coverage',
          subdirectory: () => '',
        },
      },
      include: ['./src/**/*', './tests/**/*'],
    },
  });
};