HRCenter/src/components/Button/Button.test.js

import Button from './Button'
import ReactDOM from 'react-dom'
import React from 'react'
import { getByTestId, render, screen } from '@testing-library/react';

describe("Button tests", () =>{
    it("render without crashing", () =>
    {
        const div = document.createElement('div');
        ReactDOM.render(<Button></Button>, div);
    })

    it("render button with base class",() =>
    {
        render(<Button></Button>);
        expect(screen.getByTestId('btn')).toHaveClass("c-btn");
    })
    
    it("render button with size 5",() =>
    {
        render(<Button size={5}></Button>);
        expect(screen.getByTestId('btn')).toHaveClass("c-btn--5");
    })
})