Migrate 'meta-attribute-block' e2e tests to Playwright (WordPress#55830)

* Migrate 'meta-attribute-block' e2e tests to Playwright

* Remove old test files

* Fix plugin name

test/e2e/specs/editor/plugins/meta-attribute-block.spec.js

@@ -0,0 +1,104 @@
+/**
+ * WordPress dependencies
+ */
+const { test, expect } = require( '@wordpress/e2e-test-utils-playwright' );
+
+const VARIATIONS = [
+	[ 'Early Registration', 'test/test-meta-attribute-block-early' ],
+	[ 'Late Registration', 'test/test-meta-attribute-block-late' ],
+];
+
+test.describe( 'Block with a meta attribute', () => {
+	test.beforeAll( async ( { requestUtils } ) => {
+		await requestUtils.activatePlugin(
+			'gutenberg-test-meta-attribute-block'
+		);
+	} );
+
+	test.afterAll( async ( { requestUtils } ) => {
+		await requestUtils.deactivatePlugin(
+			'gutenberg-test-meta-attribute-block'
+		);
+	} );
+
+	for ( const [ title, blockName ] of VARIATIONS ) {
+		test.describe( title, () => {
+			test( 'Should persist the meta attribute properly', async ( {
+				admin,
+				editor,
+				page,
+				pageUtils,
+			} ) => {
+				await admin.createNewPost();
+				await editor.insertBlock( { name: blockName } );
+				await page.keyboard.type( 'Value' );
+
+				// Regression Test: Previously the caret would wrongly reset to the end
+				// of any input for meta-sourced attributes, due to syncing behavior of
+				// meta attribute updates.
+				//
+				// See: https://github.com/WordPress/gutenberg/issues/15739
+				await pageUtils.pressKeys( 'ArrowLeft', { times: 5 } );
+				await page.keyboard.type( 'Meta ' );
+
+				await editor.saveDraft();
+				await page.reload();
+
+				const block = page.getByRole( 'document', {
+					name: `Block: Test Meta Attribute Block (${ title })`,
+				} );
+				await expect( block ).toBeVisible();
+				await expect( block.locator( '.my-meta-input' ) ).toHaveValue(
+					'Meta Value'
+				);
+			} );
+
+			test( 'Should use the same value in all the blocks', async ( {
+				admin,
+				editor,
+				page,
+			} ) => {
+				await admin.createNewPost();
+				await editor.insertBlock( { name: blockName } );
+				await editor.insertBlock( { name: blockName } );
+				await editor.insertBlock( { name: blockName } );
+				await page.keyboard.type( 'Meta Value' );
+
+				const inputs = await page.locator( '.my-meta-input' ).all();
+				for ( const input of inputs ) {
+					await expect( input ).toHaveValue( 'Meta Value' );
+				}
+			} );
+
+			test( 'Should persist the meta attribute properly in a different post type', async ( {
+				admin,
+				editor,
+				page,
+				pageUtils,
+			} ) => {
+				await admin.createNewPost( { postType: 'page' } );
+				await editor.insertBlock( { name: blockName } );
+				await page.keyboard.type( 'Value' );
+
+				// Regression Test: Previously the caret would wrongly reset to the end
+				// of any input for meta-sourced attributes, due to syncing behavior of
+				// meta attribute updates.
+				//
+				// See: https://github.com/WordPress/gutenberg/issues/15739
+				await pageUtils.pressKeys( 'ArrowLeft', { times: 5 } );
+				await page.keyboard.type( 'Meta ' );
+
+				await editor.saveDraft();
+				await page.reload();
+
+				const block = page.getByRole( 'document', {
+					name: `Block: Test Meta Attribute Block (${ title })`,
+				} );
+				await expect( block ).toBeVisible();
+				await expect( block.locator( '.my-meta-input' ) ).toHaveValue(
+					'Meta Value'
+				);
+			} );
+		} );
+	}
+} );