softx0 / jestintroduction

Beginning in core of Jest knowledge

Introduction to Unit test w/ Jest

Topics

• describe scope

• it scope

• test scope

• test.todo for a test that not be defined

• Object Assignments

• Falsy and Truthy values

• Numerics test

• Floating numeric test

• strings test

• the not matchers for negation

• toMatch to test w/ regExp

• Arrays test

• Handle Exception test

• Create your own matchers for the win

• the methods for control the flow of the tests

  • beforeAll
  • afterAll
  • beforeEach
  • afterEach

• Promises test ( util for REST Services ) in three differents ways

  • async/await
  • Promises
  • Callbacks

• Use the option from the jest cli

  • coverageAll
  • watchAll

Coverage report captures