'Testing a React App with Jest and react-testing-library' by _alexadam react jest
import React, { Props } from "react"; import { fireEvent, render, screen } from "@testing-library/react"; import Numbers from "./numbers"; describe=>{ test=>{ render; const text=screen.getByText; expect.
toBeInTheDocument; }); test=>{ const { container }=render const incButton=screen.getByText fireEvent, ) const text=screen.getByText; expect.toBeInTheDocument; }); test=>{ const { container }=render const decButton=screen.getByText fireEvent.click const text=screen.getByText; expect.toBeInTheDocument; }); });$>yarn test yarn run v1.22.17 $ jest PASS src/numbers.test.tsx Test ✓ Should display 42 ✓ Should increment number ✓ Should decrement number Test Suites: 1 passed, 1 total Tests: 3 passed, 3 total Snapshots: 0 total Time: 2.893 s Ran all test suites. ✨ Done in 3.88s.
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