test: improve coverage

components/__test__/ErrorPage.test.tsx

@@ -0,0 +1,15 @@
+import { render } from '@testing-library/react'
+
+import { ErrorPage } from '../ErrorPage'
+
+describe('<ErrorPage />', () => {
+  it('should render the message and statusCode', async () => {
+    const messageContent = 'message content'
+    const statusCode = 404
+    const { getByText } = render(
+      <ErrorPage statusCode={statusCode} message={messageContent} />
+    )
+    expect(getByText(messageContent)).toBeInTheDocument()
+    expect(getByText(statusCode)).toBeInTheDocument()
+  })
+})

components/__test__/Footer.test.tsx

@@ -0,0 +1,10 @@
+import { render } from '@testing-library/react'
+
+import { Footer } from '../Footer'
+
+describe('<Footer />', () => {
+  it('should render', async () => {
+    const { getByText } = render(<Footer />)
+    expect(getByText('Divlo')).toBeInTheDocument()
+  })
+})