JavaScript-Testing-with-Jest

npm init -y

npm install --save-dev jest

• Once installed, you should see it in already created Json file

• Change Jest Script to 'jest' // jest --coverage

• 'npm run test' will fail since there are no test files yet

• Create a file with the same name with an extension 'test.js'

  test('test name', () => { expect(false).toBe(false); });

  const User = require('./user')

  test('test name', () => { const user = new User() expect(user.greeting()).toBe("Hello"); });

  if(name) { return Hello ${name}; } else { return 'Hello Stranger'; }

  //can be optimized to: return "Hello" + (name || "Stranger");

  let user; beforeEach(() => { user = new User(); });

  Arrange | Act | Assert

  jest --watch-all