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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,9 +1,49 @@ | ||
| import React from 'react'; | ||
| import { render } from '@testing-library/react'; | ||
| import { render, screen } from '@testing-library/react'; | ||
| import userEvent from '@testing-library/user-event'; | ||
| import { MemoryRouter } from 'react-router'; | ||
| import fetchMock from 'jest-fetch-mock'; | ||
| import App from './App'; | ||
| import mockResponse from './__mocks__/subreddit-reactjs-response.json'; | ||
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|
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| test('renders learn react link', () => { | ||
| const { getByText } = render(<App />); | ||
| const linkElement = getByText(/learn react/i); | ||
| expect(linkElement).toBeInTheDocument(); | ||
| fetchMock.enableMocks(); | ||
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|
||
| function setup() { | ||
| return render( | ||
| <MemoryRouter> | ||
| <App /> | ||
| </MemoryRouter> | ||
| ); | ||
| } | ||
|
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| describe('Header', () => { | ||
| test('"How it works" link points to the correct page', () => { | ||
| setup(); | ||
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| const link = screen.getByRole('link', { name: /how it works/i }); | ||
| userEvent.click(link); | ||
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| expect( | ||
| screen.getByRole('heading', { name: /how it works/i }) | ||
| ).toBeInTheDocument(); | ||
| }); | ||
| }); | ||
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| describe('Subreddit form', () => { | ||
| test('loads posts and renders them on the page', async () => { | ||
| fetch.once(JSON.stringify(mockResponse)); | ||
| setup(); | ||
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| const subredditInput = screen.getByLabelText('r /'); | ||
| userEvent.type(subredditInput, 'reactjs'); | ||
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| const submitButton = screen.getByRole('button', { name: /search/i }); | ||
| userEvent.click(submitButton); | ||
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| const loadingMessage = screen.getByText(/is loading/i); | ||
| expect(loadingMessage).toBeInTheDocument(); | ||
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| expect(await screen.findByText(/Number of top posts: 25/i)).toBeInTheDocument(); | ||
| expect(fetch).toHaveBeenCalledWith('https://www.reddit.com/r/reactjs/top.json'); | ||
| }); | ||
| }); |
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