Istanbul

另一个JS代码覆盖工具，计算语句、行、函数和分支的覆盖率，模块加载器挂钩，在运行测试时透明地添加覆盖率。支持所有的JS覆盖用例，包括单元测试、服务器端功能测试和浏览器测试。为规模而建。「Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use cases including unit tests, server side functional tests and browser tests. Built for scale.」