在角度2的单元测试中询问覆盖率摘要？

Question

When I run test in angular 2 and I see a few keywords output on console command in Coverage Summary section as Statements , Branches , Functions ....

And I don't know exactly what is it?

Any help explain this for me, thank you.

Answer 1

• Statement : I think this article does a pretty goo d job explaining what a statement it. The coverage tests that all your statements are getting hit.

• Branch : When you use conditionals it create branches

   if (condition) { doThis(); // this is a branch } else { doThat(); // this is a branch } 

  Is your testing hitting all the branches?

• Functions : The functions that you declare.

   class SomeClas { methodOne() {} methodTwo() {} } it('..', () => { new SomeClass().methodOne(); }) 

  SomeClass has two methods, but only one is getting tested. 50%. If you either explicitly call methodTwo in your test or methodOne calls methodTwo , your coverage goes to 100%

• Lines: : The lines of code, checks to see if all the lines of code are being hit.