Add lightbox tests covering theme.json configurations, including edge cases

packages/block-editor/src/components/url-popover/image-url-input-ui.js

@@ -369,6 +369,7 @@ const ImageURLInputUI = ( {
 											onSetLightbox( true );
 											stopEditLink();
 										} }
+										label={ __( 'Expand on click' ) }
 									>
 										{ __( 'Expand on click' ) }
 									</MenuItem>

packages/block-library/src/image/index.php

@@ -204,7 +204,7 @@ function block_core_image_render_lightbox( $block_content, $block ) {
 	$button =
 		$img[0]
 		. '<button
-			class="lightbox-trigger"
+			class="wp-lightbox-trigger"
 			type="button"
 			aria-haspopup="dialog"
 			aria-label="' . esc_attr( $aria_label ) . '"

packages/e2e-test-utils-playwright/src/editor/index.ts

@@ -28,6 +28,7 @@ import { saveSiteEditorEntities } from './site-editor';
 import { setIsFixedToolbar } from './set-is-fixed-toolbar';
 import { switchToLegacyCanvas } from './switch-to-legacy-canvas';
 import { transformBlockTo } from './transform-block-to';
+import { updatePost } from './update-post';
 
 type EditorConstructorProps = {
 	page: Page;
@@ -89,4 +90,6 @@ export class Editor {
 		switchToLegacyCanvas.bind( this );
 	/** @borrows transformBlockTo as this.transformBlockTo */
 	transformBlockTo: typeof transformBlockTo = transformBlockTo.bind( this );
+	/** @borrows updatePost as this.updatePost */
+	updatePost: typeof updatePost = updatePost.bind( this );
 }

packages/e2e-test-utils-playwright/src/editor/update-post.ts

@@ -0,0 +1,23 @@
+/**
+ * Internal dependencies
+ */
+import type { Editor } from './index';
+
+/**
+ * Publishes the post, resolving once the request is complete (once a notice
+ * is displayed).
+ *
+ * @param this
+ */
+export async function updatePost( this: Editor ) {
+	const updateButton = this.page.getByRole( 'button', {
+		name: 'Update',
+	} );
+	await updateButton.click();
+
+	await this.page
+		.getByRole( 'button', {
+			name: 'Update',
+		} )
+		.waitFor();
+}