Preload: add testing for post editor and pages in site editor

test/e2e/specs/site-editor/preload.spec.js

@@ -3,7 +3,41 @@
  */
 const { test, expect } = require( '@wordpress/e2e-test-utils-playwright' );
 
-test.describe( 'Preload', () => {
+function recordRequests( page ) {
+	const requests = [];
+
+	function onRequest( request ) {
+		if (
+			request.resourceType() === 'document' &&
+			request.url().startsWith( 'blob:' )
+		) {
+			// Stop recording when the iframe is initialized.
+			page.off( 'request', onRequest );
+		} else if ( request.resourceType() === 'fetch' ) {
+			const url = request.url();
+			const urlObject = new URL( url );
+			const path =
+				urlObject.searchParams.get( 'rest_route' ) ??
+				urlObject.pathname;
+			const method = request.method();
+			requests.push( [ method, path ] );
+		}
+	}
+
+	page.on( 'request', onRequest );
+
+	return requests;
+}
+
+const post = {
+	status: 'publish',
+	title: 'A post',
+	content: `<!-- wp:paragraph -->
+<p>Post content</p>
+<!-- /wp:paragraph -->`,
+};
+
+test.describe( 'Preload: should make no requests before the iframe is loaded', () => {
 	test.beforeAll( async ( { requestUtils } ) => {
 		await requestUtils.activateTheme( 'emptytheme' );
 		await requestUtils.resetPreferences();
@@ -13,42 +47,39 @@ test.describe( 'Preload', () => {
 		await requestUtils.activateTheme( 'twentytwentyone' );
 	} );
 
-	test( 'Should make no requests before the iframe is loaded', async ( {
-		page,
-		admin,
-	} ) => {
-		const requests = [];
-
-		function onRequest( request ) {
-			if (
-				request.resourceType() === 'document' &&
-				request.url().startsWith( 'blob:' )
-			) {
-				// Stop recording when the iframe is initialized.
-				page.off( 'request', onRequest );
-			} else if ( request.resourceType() === 'fetch' ) {
-				const url = request.url();
-				const urlObject = new URL( url );
-				const restRoute = urlObject.searchParams.get( 'rest_route' );
-				if ( restRoute ) {
-					requests.push( restRoute );
-				} else {
-					requests.push( url );
-				}
-			}
-		}
-
-		page.on( 'request', onRequest );
-
+	test( 'Site Editor Root', async ( { page, admin } ) => {
+		const requests = recordRequests( page );
 		await admin.visitSiteEditor();
-
 		// To do: these should all be removed or preloaded.
 		expect( requests ).toEqual( [
 			// There are two separate settings OPTIONS requests. We should fix
 			// so the one for canUser and getEntityRecord are reused.
-			'/wp/v2/settings',
+			[ 'OPTIONS', '/wp/v2/settings' ],
 			// Seems to be coming from `enableComplementaryArea`.
-			'/wp/v2/users/me',
+			[ 'POST', '/wp/v2/users/me' ],
+		] );
+	} );
+
+	test( 'Post Editor', async ( { page, admin, requestUtils } ) => {
+		const requests = recordRequests( page );
+		const { id } = await requestUtils.createPost( post );
+		await admin.editPost( id );
+		expect( requests ).toEqual( [] );
+	} );
+
+	test( 'Site Editor Page', async ( { page, admin, requestUtils } ) => {
+		const requests = recordRequests( page );
+		const { id } = await requestUtils.createPage( post );
+		await admin.visitSiteEditor( {
+			postType: 'page',
+			postId: id,
+			canvas: 'edit',
+		} );
+		expect( requests ).toEqual( [
+			[ 'GET', '/wp/v2/types/page' ],
+			[ 'OPTIONS', '/wp/v2/settings' ],
+			[ 'GET', '/wp/v2/taxonomies' ],
+			[ 'POST', '/wp/v2/users/me' ],
 		] );
 	} );
 } );