[Jest] 한 함수를 여러번 쓸경우, 여러 return 값이 필요시

https://jestjs.io/docs/mock-function-api#mockfnmockreturnvalueoncevalue

[Mock Functions · Jest

Mock functions are also known as "spies", because they let you spy on the behavior of a function that is called indirectly by some other code, rather than only testing the output. You can create a mock function with jest.fn(). If no implementation is given

jestjs.io](https://jestjs.io/docs/mock-function-api#mockfnmockreturnvalueoncevalue)

https://stackoverflow.com/questions/53887173/jest-mock-the-same-function-twice-with-different-arguments

[Jest mock the same function twice with different arguments

I'm new to JEST and I'm currently testing a Javascript component that makes an API call in its onComponentDidMount. Depending on the return data of the ajax call (api call) my component either disp...

stackoverflow.com](https://stackoverflow.com/questions/53887173/jest-mock-the-same-function-twice-with-different-arguments)

jest 의 mockReturnOnce기능을 이용하면됨