Chai 란 TDD/ BDD 스타일의 Assertion Library 이다. 공식 문서 https://www.chaijs.com/ Chai Powered by Open Source Chai is hosted on GitHub. Have a suggestion or found a bug? Fork this project to help make Chai even better. Even this documentation site is open source and available for contribution. www.chaijs.com Should, Expect, Assert 세가지 스타일의 인터페이스를 제공함. Should chai.should(); foo.should.be.a('string'); foo...