Page error test: fix visibility check, fix error text.

playwright/e2e/atk_page_error/atk_page_error.spec.js

@@ -44,9 +44,7 @@ test.describe('Page error tests.', () => {
     await page.goto(baseUrl + badAnonymousUrl);
 
     // Should see the 403 message.
-    let textContent = '';
-    textContent = await page.content();
-    expect(textContent).toContain('403 error page');
+    await expect(page.getByText('403 Error Page')).toBeVisible();
   });
 
   // Validate that 403 page appears.
@@ -65,15 +63,12 @@ test.describe('Page error tests.', () => {
     await page.goto(baseUrl + `${badAnonymousUrl}`);
 
     // Should see the 404 message.
-    let textContent = '';
-    textContent = await page.content();
-    expect(textContent).toContain('404 error page');
+    await expect(page.getByText('404 Error Page')).toBeVisible();
 
     await atkCommands.logInViaForm(page, context, qaUserAccounts.authenticated);
     await page.goto(baseUrl + badAuthenticatedUrl);
 
     // Should see the 404 message.
-    textContent = await page.content();
-    expect(textContent).toContain('404 error page');
+    await expect(page.getByText('404 Error Page')).toBeVisible();
   });
 });