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import { describe, it, expect, beforeEach, vi } from 'vitest'
import { setupThemeToggle } from '../../src/components/Header.js'
// Mock DOM elements
const mockDocument = {
documentElement: {
getAttribute: vi.fn(),
setAttribute: vi.fn()
},
getElementById: vi.fn()
}
global.document = mockDocument
describe('Header', () => {
beforeEach(() => {
vi.clearAllMocks()
})
describe('toggleDarkMode', () => {
it('should toggle from dark to light theme', () => {
// Setup: current theme is dark
mockDocument.documentElement.getAttribute.mockReturnValue('dark')
const mockElement = {
addEventListener: vi.fn()
}
mockDocument.getElementById.mockReturnValue(mockElement)
// Get the toggle function by setting up the event listener
setupThemeToggle()
const clickHandler = mockElement.addEventListener.mock.calls[0][1]
// Execute the toggle function
clickHandler()
expect(mockDocument.documentElement.setAttribute).toHaveBeenCalledWith('data-theme', 'light')
})
it('should toggle from light to dark theme', () => {
// Setup: current theme is light
mockDocument.documentElement.getAttribute.mockReturnValue('light')
const mockElement = {
addEventListener: vi.fn()
}
mockDocument.getElementById.mockReturnValue(mockElement)
setupThemeToggle()
const clickHandler = mockElement.addEventListener.mock.calls[0][1]
clickHandler()
// This should work correctly
expect(mockDocument.documentElement.setAttribute).toHaveBeenCalledWith('data-theme', 'dark')
})
describe('setupThemeToggle', () => {
it('should add click event listener to theme toggle button', () => {
const mockElement = {
addEventListener: vi.fn()
}
mockDocument.getElementById.mockReturnValue(mockElement)
setupThemeToggle()
expect(mockDocument.getElementById).toHaveBeenCalledWith('theme')
expect(mockElement.addEventListener).toHaveBeenCalledWith('click', expect.any(Function))
})
})
})
});
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