a react+typescript+tdd demo
while 'npm run test', our test will run automatically when the test files or project files change
if the last time test is still running, it will kill the last test process, and run test from the start again.
react+typescript的tdd demo
当测试文件或者项目文件改变并保存是，我们的测试会自动运行。若这时上一次的测试还没有停止，会停掉上一次测试进程，并重新开始测试
2. npm install ( install all the dependencies )
3. npm link typescript （ if you hava typescript in globale enviroment ）
4. npm start ( start the project )
5. npm run test ( start to run test )