awesome-typescript-loader/src/__test__/compile-output.ts

Awesome TS loader for webpack

import {
    src, tsconfig, stdout, stderr,
    spec, file, execWebpack
} from './utils';

export function config(env) {
    file(`webpack.config.js`, `
        const path = require('path')
        module.exports = {
            entry: { index: path.join(process.cwd(), '${env.SRC_DIR}', 'index.ts') },
            output: {
                path: path.join(process.cwd(), '${env.OUT_DIR}'),
                filename: '[name].js'
            },
            resolve: {
                extensions: ['.ts', '.tsx', '.js', '.jsx'],
            },
            module: {
                loaders: [
                    {
                        test: /\.(tsx?|jsx?)/,
                        loader: path.resolve(process.cwd(), '..', '..', 'index.js'),
                        include: [ path.join(process.cwd(), '${env.SRC_DIR}') ],
                        query: {
                            silent: true
                        }
                    }
                ]
            }
        }
    `);
}

spec(__filename, async function(env, done) {
    src('index.ts', `
        export default function sum(a: number, b: number) {
            return a + b;
        }

        sum(1, '1');
    `);

    tsconfig();
    config(env);

    const webpack = execWebpack();
    webpack.strictOutput();

    await webpack.wait(
        stderr('Checking finished with 1 errors'),
        stdout([
            'ERROR in [at-loader]',
            `Argument of type '"1"' is not assignable to parameter of type 'number'`
        ])
    );

    webpack.close();
    done();
});