Refactor HeaderCrop component to fix zoom functionality

src/components/@molecules/ProfileEditor/Header/HeaderCrop.test.tsx

@@ -0,0 +1,144 @@
+import { fireEvent, mockFunction, render, screen, waitFor } from '@app/test-utils'
+import { beforeAll, describe, expect, it, vi } from 'vitest'
+
+import { makeMockIntersectionObserver } from '../../../../../test/mock/makeMockIntersectionObserver'
+import { CropComponent } from './HeaderCrop'
+
+makeMockIntersectionObserver()
+
+const mockHandleCancel = vi.fn()
+const mockSetDataURL = vi.fn()
+
+// Create a simple 100x100 image for testing
+const createTestImage = () => {
+  const canvas = document.createElement('canvas')
+  canvas.width = 100
+  canvas.height = 100
+  const ctx = canvas.getContext('2d')!
+  ctx.fillStyle = 'red'
+  ctx.fillRect(0, 0, 100, 100)
+
+  return new Promise<File>((resolve) => {
+    canvas.toBlob((blob) => {
+      if (blob) {
+        resolve(new File([blob], 'test.png', { type: 'image/png' }))
+      }
+    })
+  })
+}
+
+describe('<CropComponent /> - Zoom Functionality', () => {
+  beforeAll(() => {
+    URL.createObjectURL = vi.fn(() => 'https://localhost/test.png')
+  })
+
+  it('renders the crop component with zoom slider', async () => {
+    const mockFile = await createTestImage()
+    render(
+      <CropComponent header={mockFile} handleCancel={mockHandleCancel} setDataURL={mockSetDataURL} />
+    )
+
+    expect(screen.getByTestId('edit-image-container')).toBeVisible()
+
+    // Check if slider is present
+    const slider = screen.getByLabelText('zoom')
+    expect(slider).toBeInTheDocument()
+    expect(slider).toHaveAttribute('min', '100')
+    expect(slider).toHaveAttribute('max', '200')
+  })
+
+  it('changes zoom value when slider is moved', async () => {
+    const mockFile = await createTestImage()
+    render(
+      <CropComponent header={mockFile} handleCancel={mockHandleCancel} setDataURL={mockSetDataURL} />
+    )
+
+    const slider = screen.getByLabelText('zoom') as HTMLInputElement
+
+    // Initial value should be 100
+    expect(slider.value).toBe('100')
+
+    // Change zoom to 150
+    fireEvent.change(slider, { target: { value: '150' } })
+
+    await waitFor(() => {
+      expect(slider.value).toBe('150')
+    })
+  })
+
+  it('handles zoom to maximum value', async () => {
+    const mockFile = await createTestImage()
+    render(
+      <CropComponent header={mockFile} handleCancel={mockHandleCancel} setDataURL={mockSetDataURL} />
+    )
+
+    const slider = screen.getByLabelText('zoom') as HTMLInputElement
+
+    // Change zoom to max (200)
+    fireEvent.change(slider, { target: { value: '200' } })
+
+    await waitFor(() => {
+      expect(slider.value).toBe('200')
+    })
+  })
+
+  it('calls handleCancel when cancel button is clicked', async () => {
+    const mockFile = await createTestImage()
+    render(
+      <CropComponent header={mockFile} handleCancel={mockHandleCancel} setDataURL={mockSetDataURL} />
+    )
+
+    const cancelButton = screen.getByTestId('header-cancel-button')
+    fireEvent.click(cancelButton)
+
+    expect(mockHandleCancel).toHaveBeenCalled()
+  })
+
+  it('calls setDataURL when continue button is clicked', async () => {
+    const mockFile = await createTestImage()
+    mockSetDataURL.mockClear()
+
+    render(
+      <CropComponent header={mockFile} handleCancel={mockHandleCancel} setDataURL={mockSetDataURL} />
+    )
+
+    // Wait for canvas to be in the document
+    await waitFor(() => {
+      const canvas = document.querySelector('canvas')
+      expect(canvas).toBeInTheDocument()
+    }, { timeout: 3000 })
+
+    const continueButton = screen.getByTestId('continue-button')
+    fireEvent.click(continueButton)
+
+    await waitFor(() => {
+      expect(mockSetDataURL).toHaveBeenCalled()
+      const dataURL = mockSetDataURL.mock.calls[0][0]
+      expect(dataURL).toMatch(/^data:image\/jpeg;base64,/)
+    })
+  })
+
+  it('displays 3:1 aspect ratio labels', async () => {
+    const mockFile = await createTestImage()
+    render(
+      <CropComponent header={mockFile} handleCancel={mockHandleCancel} setDataURL={mockSetDataURL} />
+    )
+
+    await waitFor(() => {
+      const labels = screen.getAllByText(/3:1/i)
+      expect(labels).toHaveLength(2)
+    })
+  })
+
+  it('displays 6:1 aspect ratio labels', async () => {
+    const mockFile = await createTestImage()
+    render(
+      <CropComponent header={mockFile} handleCancel={mockHandleCancel} setDataURL={mockSetDataURL} />
+    )
+
+    await waitFor(() => {
+      const labels = screen.getAllByText(/6:1/i)
+      expect(labels).toHaveLength(2)
+    })
+  })
+})