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platzi-express-jest's Introduction

Sobre el proyecto y Jest:

LICENCIA

MIT

HABILITAR ECMASCRIPT 6:

Dependencies

{
  "devDependencies": {
    "babel-jest": "^20.0.3",
    "babel-polyfill": "^6.26.0",
    "babel-preset-es2015": "^6.24.1"
  }
}

Babel config (.babelrc file)

"presets": ["es2015"]

SOBRE LOS TEST:

Dónde hubicar los ficheros de test:

Crear la carpeta __test__ o __TEST__ para Jest sepa identificar dónde están los test.

Nombres de los ficheros de test:

[FILENAME].test.js

Cómo ejecutar los test:

Desde línea de comnados

jest

o bien

jest [FILENAME]
  • Donde FILENAME es el fichero [FILENAME].test.js

  • Otra opción es incluir en los script del package.json el comando jest:

{
  ...
  "scripts": {
    "test": "jest"
  },
  ...
}

TESTING NODE EXPRESS APP

  • Instalar las siguientes dependendencias:
npm install --save-dev babel-cli babel-preset-env jest supertest

COMPARADORES / MATCHERS

  • toBe
  • not.toBe
  • toEqual
  • not.toEqual

PRUEBAS UNITARIAS CON NÚMEROS

  • .toBeGreaterThan()
  • .toBeGreaterThanOrEqual()
  • .toBeLessThan()
  • .toBeLessThanOrEqual()
  • .toBeCloseTo()

FUNCIONES QUE DEVUELEN Boolean, Udefined o Null

  • .toBeNull()
  • .toBeTruthy()
  • .toBeFalsy()
  • .toBeUndefined()
  • .not.toBeTruthy()

TODO

SNAPSHOT TESTING

https://jestjs.io/docs/en/next/snapshot-testing

TESTING MOCK FUNCTIONS

https://jestjs.io/docs/en/next/mock-functions

TESTING ASYNCHRONOUS FUNCTIONS

https://jestjs.io/docs/en/next/tutorial-async

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