Migrate Fullscreen mode test to Playwright

test/e2e/specs/editor/various/fullscreen-mode.spec.js

@@ -0,0 +1,39 @@
+/**
+ * WordPress dependencies
+ */
+const { test, expect } = require( '@wordpress/e2e-test-utils-playwright' );
+
+test.describe( 'Fullscreen Mode', () => {
+	test.beforeEach( async ( { admin } ) => {
+		await admin.createNewPost();
+	} );
+
+	test.afterEach( async ( { requestUtils } ) => {
+		await requestUtils.deleteAllPosts();
+	} );
+
+	test( 'should open the fullscreen mode from the more menu', async ( {
+		page,
+	} ) => {
+		// Open Options Menu
+		await page.click(
+			'role=region[name="Editor top bar"i] >> role=button[name="Options"i]'
+		);
+
+		// Select Full Screen Mode
+		await page
+			.locator( 'role=menuitemcheckbox', { hasText: 'Fullscreen mode' } )
+			.click();
+
+		// Check the body class.
+		await expect( page.locator( 'body' ) ).toHaveClass(
+			/is-fullscreen-mode/
+		);
+
+		await expect(
+			page.locator(
+				'role=region[name="Editor top bar"i] >> role=link[name="View Posts"i]'
+			)
+		).toBeVisible();
+	} );
+} );