test: verify delete thumb page button is disabled when only one page remains

e2e/thumb-pages/delete-button-disabled-when-only-one-thumb-page.spec.ts

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+import { test, expect } from '@playwright/test';
+
+test('when there is just one thumb page active, delete thumb page button has to be disabled', async ({
+  page,
+}) => {
+  await page.goto('');
+
+  // Open Pages panel
+  await page.getByText('Pages').click();
+
+  // Add two more pages
+  const addButton = page.getByRole('button', { name: 'add new page' });
+  await addButton.click();
+  await addButton.click();
+
+  // Delete page 3
+  const deleteButton = page.locator('div').filter({ hasText: /^Delete$/ });
+
+  const pageThree = page.getByText('Page 3', { exact: true });
+  expect(pageThree).toBeVisible();
+  const thumbThreeDiv = pageThree.locator('..');
+  await thumbThreeDiv.click({ button: 'right' });
+  await deleteButton.click();
+
+  // Delete page 2
+  const pageTwo = page.getByText('Page 2', { exact: true });
+  expect(pageTwo).toBeVisible();
+  const thumbTwoDiv = pageTwo.locator('..');
+  await thumbTwoDiv.click({ button: 'right' });
+  await deleteButton.click();
+
+  // Try to delete page 1
+  const pageOne = page.getByText('Page 1', { exact: true });
+  expect(pageOne).toBeVisible();
+  const thumbOneDiv = pageOne.locator('..');
+  await thumbOneDiv.click({ button: 'right' });
+
+  // Check if delete button is disabled
+  await expect(deleteButton).toHaveClass(/disabled/);
+});