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| 1 | +import React from 'react'; |
| 2 | +import { render, screen } from '@testing-library/react'; |
| 3 | +import userEvent from '@testing-library/user-event'; |
| 4 | +import DarkModeToggle from '../index'; |
| 5 | + |
| 6 | +let mockCurrentTheme = ''; |
| 7 | +const mockToggleTheme = jest.fn().mockImplementation((newTheme: string) => { |
| 8 | + mockCurrentTheme = newTheme; |
| 9 | +}); |
| 10 | + |
| 11 | +// mock dark mode module for controlling dark mode HOC behavior |
| 12 | +jest.mock('@skagami/gatsby-plugin-dark-mode', () => ({ |
| 13 | + __esModule: true, |
| 14 | + useTheme: () => [mockCurrentTheme, mockToggleTheme], |
| 15 | +})); |
| 16 | + |
| 17 | +describe('DarkModeToggle Component', () => { |
| 18 | + it('render dark mode toggle', () => { |
| 19 | + const { container } = render(<DarkModeToggle />); |
| 20 | + expect(container).toMatchSnapshot(); |
| 21 | + }); |
| 22 | + |
| 23 | + it('switches dark theme to light theme', async () => { |
| 24 | + mockCurrentTheme = 'dark'; |
| 25 | + render(<DarkModeToggle />); |
| 26 | + const toggle = await screen.findByText('Toggle Dark Mode'); |
| 27 | + await userEvent.click(toggle); |
| 28 | + expect(mockCurrentTheme).toBe('light'); |
| 29 | + }); |
| 30 | + |
| 31 | + it('switches light theme to dark theme', async () => { |
| 32 | + mockCurrentTheme = 'light'; |
| 33 | + render(<DarkModeToggle />); |
| 34 | + const toggle = await screen.findByText('Toggle Dark Mode'); |
| 35 | + await userEvent.click(toggle); |
| 36 | + expect(mockCurrentTheme).toBe('dark'); |
| 37 | + }); |
| 38 | +}); |
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