2021/06/18 검색 결과

해당 글 5건

jest (5) : Mock, 외부 패키지 Mock, Spy

https://jestjs.io/docs/mock-function-api 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 What mocking is? mocking? unit test를 작성함에 있어 실제 DB를 건드리게 되고 이러한 테스트가..
Node, Nest, Deno/🧪 test (jest, mocha...) 2021. 6. 18. 23:15

jest (4) : Setup and test block scope

테스트를 구동하기 전에 모듈을 임포트하는 등의 작업 혹은 테스트를 구동한 후에 처리해야 하는 작업 등 테스트 전, 후에 작업을 해야할 경우가 종종 있습니다. setup 테스트 전, 후에 트리거 되는 코드 조각들은 (before | after)(All | Each) 내부에 넣으면 됩니다. beforeAll, afterAll In some cases, you only need to do setup once, at the beginning of a file. This can be especially bothersome when the setup is asynchronous, so you can't do it inline. Jest provides beforeAll and afterAll to handle th..
Node, Nest, Deno/🧪 test (jest, mocha...) 2021. 6. 18. 11:52

jest (3) : 비동기 코드 테스트하기

https://jestjs.io/docs/asynchronous Testing Asynchronous Code · Jest It's common in JavaScript for code to run asynchronously. When you have code that runs asynchronously, Jest needs to know when the code it is testing has completed, before it can move on to another test. Jest has several ways to handle this. jestjs.io 비동기 테스트를 잘못 짜면 아래와 같은 경고 문구가 터미널에 출력됩니다. Jest did not exit one second after t..
Node, Nest, Deno/🧪 test (jest, mocha...) 2021. 6. 18. 08:17

jest (2) : Matcher 사용하여 테스팅하기

using matchers : https://jestjs.io/docs/using-matchers matcher란 이거 맞아? 라고 물어보는 메서드입니다. 기대한 값이 실제 반환된 값과 일치하는 지를 확인하는 작업인 것이죠. 모든 matcher를 확인해보고 싶다면 expect에 대한 api 상세서 https://jestjs.io/docs/expect 를 참고합시다. Expect · Jest When you're writing tests, you often need to check that values meet certain conditions. expect gives you access to a number of "matchers" that let you validate different things. ..
Node, Nest, Deno/🧪 test (jest, mocha...) 2021. 6. 18. 06:47

jest (1) : installation, configuring

https://jestjs.io/ Jest By ensuring your tests have unique global state, Jest can reliably run tests in parallel. To make things quick, Jest runs previously failed tests first and re-organizes runs based on how long test files take. jestjs.io installation (1) 설치 yarn add jest jest-cli -D yarn add @types/jest ts-jest -D // typescript 환경 정말 단순하게는, [file].test.js 꼴의 폴더를 만들고 이를 jest 명령어만을 사용해서 테스트를 ..
Node, Nest, Deno/🧪 test (jest, mocha...) 2021. 6. 18. 05:54