Extend the test plugin with editor.BlockEdit filter

packages/e2e-tests/plugins/block-bindings.php

@@ -41,7 +41,11 @@ function gutenberg_test_block_bindings_registration() {
 		plugins_url( 'block-bindings/index.js', __FILE__ ),
 		array(
 			'wp-blocks',
-			'wp-private-apis',
+			'wp-block-editor',
+			'wp-components',
+			'wp-compose',
+			'wp-element',
+			'wp-hooks',
 		),
 		filemtime( plugin_dir_path( __FILE__ ) . 'block-bindings/index.js' ),
 		true

packages/e2e-tests/plugins/block-bindings/index.js

@@ -1,4 +1,9 @@
 const { registerBlockBindingsSource } = wp.blocks;
+const { InspectorControls } = wp.blockEditor;
+const { PanelBody, TextControl } = wp.components;
+const { createHigherOrderComponent } = wp.compose;
+const { createElement: el, Fragment } = wp.element;
+const { addFilter } = wp.hooks;
 const { fieldsList } = window.testingBindings || {};
 
 const getValues = ( { bindings } ) => {
@@ -46,3 +51,43 @@ registerBlockBindingsSource( {
 	getValues,
 	canUserEditValue: () => true,
 } );
+
+const withBlockBindingsInspectorControl = createHigherOrderComponent(
+	( BlockEdit ) => {
+		return ( props ) => {
+			if ( ! props.attributes?.metadata?.bindings?.content ) {
+				return el( BlockEdit, props );
+			}
+
+			return el(
+				Fragment,
+				{},
+				el( BlockEdit, props ),
+				el(
+					InspectorControls,
+					{},
+					el(
+						PanelBody,
+						{ title: 'Bindings' },
+						el( TextControl, {
+							__next40pxDefaultSize: true,
+							__nextHasNoMarginBottom: true,
+							label: 'Content',
+							value: props.attributes.content,
+							onChange: ( content ) =>
+								props.setAttributes( {
+									content,
+								} ),
+						} )
+					)
+				)
+			);
+		};
+	}
+);
+
+addFilter(
+	'editor.BlockEdit',
+	'testing/bindings-inspector-control',
+	withBlockBindingsInspectorControl
+);