Enable the verse block for mobile (#21883)

Enable the verse block for production

* Remove the devOnly flag to make the verse block not only available on debug builds, but also in production builds.
* Add unit test for verse block

packages/block-library/src/index.native.js

@@ -158,7 +158,7 @@ export const registerCoreBlocks = () => {
 		shortcode,
 		buttons,
 		latestPosts,
-		devOnly( verse ),
+		verse,
 		cover,
 		pullquote,
 	].forEach( registerBlock );

packages/block-library/src/verse/edit.js

@@ -34,6 +34,7 @@ export default function VerseEdit( {
 			</BlockControls>
 			<RichText
 				tagName={ Block.pre }
+				identifier="content"
 				preserveWhiteSpace
 				value={ content }
 				onChange={ ( nextContent ) => {

packages/block-library/src/verse/test/edit.native.js

@@ -0,0 +1,34 @@
+/**
+ * External dependencies
+ */
+import renderer from 'react-test-renderer';
+
+/**
+ * Internal dependencies
+ */
+import Verse from '../edit';
+
+/**
+ * WordPress dependencies
+ */
+import { RichText } from '@wordpress/block-editor';
+
+describe( 'Verse Block', () => {
+	it( 'renders without crashing', () => {
+		const component = renderer.create(
+			<Verse attributes={ { content: '' } } />
+		);
+		const rendered = component.toJSON();
+		expect( rendered ).toBeTruthy();
+	} );
+
+	it( 'renders given text without crashing', () => {
+		const component = renderer.create(
+			<Verse attributes={ { content: 'sample text' } } />
+		);
+		const testInstance = component.root;
+		const richText = testInstance.findByType( RichText );
+		expect( richText ).toBeTruthy();
+		expect( richText.props.value ).toBe( 'sample text' );
+	} );
+} );