Build/Test Tools: Prevent 404 errors in the E2E tests.

Modifies the cache control headers tests to prevent 404 errors for each of the tests.

Props costdev.
Fixes #58777.


git-svn-id: https://develop.svn.wordpress.org/trunk@56197 602fd350-edb4-49c9-b593-d223f7449a82

Author: peterwilsoncc

tests/e2e/specs/cache-control-headers-directives.test.js

@@ -1,6 +1,7 @@
 import {
 	visitAdminPage,
 	createNewPost,
+	publishPost,
 	trashAllPosts,
 	createURL,
 	logout,
@@ -13,10 +14,8 @@ describe( 'Cache Control header directives', () => {
 	} );
 
 	it( 'No private directive present in cache control when user not logged in.', async () => {
-		await createNewPost( {
-			title: 'Hello World',
-			post_status: 'publish',
-		} );
+		await createNewPost( { title: 'Hello World' } );
+		await publishPost();
 		await logout();
 
 		const response = await page.goto( createURL( '/hello-world/' ) );
@@ -27,7 +26,7 @@ describe( 'Cache Control header directives', () => {
 	} );
 
 	it( 'Private directive header present in cache control when logged in.', async () => {
-		await visitAdminPage( '/wp-admin' );
+		await visitAdminPage( '/' );
 
 		const response = await page.goto( createURL( '/wp-admin' ) );
 		const responseHeaders = response.headers();