#155

frontend/src/components/RouteBlockerOverlay.test.tsx

@@ -0,0 +1,30 @@
+import { render, screen } from '@testing-library/react'
+import { afterEach, describe, expect, it } from 'vitest'
+
+import RouteBlockerOverlay, { useOverlayStore } from '@/components/RouteBlockerOverlay'
+
+describe ('RouteBlockerOverlay', () => {
+  afterEach (() => {
+    useOverlayStore.setState ({ active: false })
+    document.body.style.overflow = ''
+    document.body.removeAttribute ('aria-busy')
+  })
+
+  it ('renders nothing while inactive', () => {
+    useOverlayStore.setState ({ active: false })
+
+    const { container } = render (<RouteBlockerOverlay/>)
+
+    expect (container).toBeEmptyDOMElement ()
+  })
+
+  it ('renders a blocking progressbar and marks the body busy while active', () => {
+    useOverlayStore.setState ({ active: true })
+
+    render (<RouteBlockerOverlay/>)
+
+    expect (screen.getByRole ('progressbar', { name: 'Loading' })).toBeInTheDocument ()
+    expect (document.body).toHaveAttribute ('aria-busy', 'true')
+    expect (document.body.style.overflow).toBe ('hidden')
+  })
+})