add tests for create dialog

frontend/src/v2/features/ulam/components/element/__tests__/mission-create-dialog.test.tsx

@@ -0,0 +1,23 @@
+import { render, screen, fireEvent } from '../../../../../../test-utils.tsx'
+import { describe, it, vi } from 'vitest'
+import MissionCreateDialog from '../mission-create-dialog.tsx'
+
+describe('MissionCreateDialog', () => {
+  it('renders the dialog when isOpen is true', () => {
+    render(<MissionCreateDialog isOpen={true} onClose={vi.fn()} />)
+    expect(screen.getByText("Création d'un rapport de mission")).toBeInTheDocument()
+  })
+
+  it('does not render the dialog when isOpen is false', () => {
+    render(<MissionCreateDialog isOpen={false} onClose={vi.fn()} />)
+    expect(screen.queryByText("Création d'un rapport de mission")).not.toBeInTheDocument()
+  })
+
+  it('calls onClose when the close button is clicked', () => {
+    const handleClose = vi.fn()
+    render(<MissionCreateDialog isOpen={true} onClose={handleClose} />)
+
+    fireEvent.click(screen.getByText('Annuler'))
+    expect(handleClose).toHaveBeenCalled()
+  })
+})