Created
March 5, 2021 14:29
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| After entering into your project in the console | |
| yarn test 'name' ex App | |
| look at App.test.js | |
| expect(name of function).toBeInTheDocument(answer); | |
| import { render, screen } from '@testing-library/react'; | |
| import App from './App'; | |
| import {calcTax, isOfAge} from './helpers' | |
| test('check tax calc 1', () => { | |
| expect(calcTax(.10, 50.00)).toBe(5.0) | |
| }) | |
| test('check if 18 fails drinking age', () => { | |
| expect(isOfAge(18)).toBe(false) | |
| }) | |
| test('check if 45 fails drinking age', () => { | |
| expect(isOfAge(45)).toBe(true) | |
| }) | |
| test('check if 21 fails drinking age', () => { | |
| expect(isOfAge(21)).toBe(true) | |
| }) | |
| test('check if -99 fails drinking age', () => { | |
| expect(isOfAge(-99)).toBe(false) | |
| }) | |
| test('check if xyz fails drinking age', () => { | |
| expect(isOfAge('xyz')).toBe(false) | |
| }) | |
| test('renders learn react link', () => { | |
| render(<App />); | |
| const linkElement = screen.getByText(/learn react/i); | |
| expect(linkElement).toBeInTheDocument(); | |
| }); | |
| test('renders learn react about the nav', () => { | |
| render(<App />); | |
| const linkElement = screen.getByText(/about/i); | |
| expect(linkElement).toBeInTheDocument(); | |
| }); |
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