Migrate flaky PostPublishButton e2e tests to Playwright

test/e2e/specs/editor/various/publish-button.spec.js

@@ -0,0 +1,72 @@
+/**
+ * WordPress dependencies
+ */
+const { test, expect } = require( '@wordpress/e2e-test-utils-playwright' );
+
+test.describe( 'Post publish button', () => {
+	test.beforeEach( async ( { admin, page } ) => {
+		await admin.createNewPost();
+		await page.evaluate( () => {
+			window.wp.data.dispatch( 'core/editor' ).disablePublishSidebar();
+		} );
+	} );
+
+	test.afterEach( async ( { page } ) => {
+		await page.evaluate( () => {
+			window.wp.data.dispatch( 'core/editor' ).enablePublishSidebar();
+		} );
+	} );
+
+	test( 'should be disabled when post is not saveable', async ( {
+		page,
+	} ) => {
+		await expect(
+			page
+				.getByRole( 'region', { name: 'Editor top bar' } )
+				.getByRole( 'button', { name: 'Publish' } )
+		).toBeDisabled();
+	} );
+
+	test( 'should be disabled when post is being saved', async ( {
+		editor,
+		page,
+	} ) => {
+		await editor.canvas.type(
+			'role=textbox[name="Add title"i]',
+			'Test post'
+		);
+
+		const topBar = page.getByRole( 'region', { name: 'Editor top bar' } );
+		await expect(
+			topBar.getByRole( 'button', { name: 'Publish' } )
+		).toBeEnabled();
+
+		await topBar.getByRole( 'button', { name: 'Save draft' } ).click();
+		await expect(
+			topBar.getByRole( 'button', { name: 'Publish' } )
+		).toBeDisabled();
+	} );
+
+	test( 'should be disabled when metabox is being saved', async ( {
+		editor,
+		page,
+	} ) => {
+		await editor.canvas.type(
+			'role=textbox[name="Add title"i]',
+			'Test post'
+		);
+
+		const topBar = page.getByRole( 'region', { name: 'Editor top bar' } );
+		await expect(
+			topBar.getByRole( 'button', { name: 'Publish' } )
+		).toBeEnabled();
+
+		await page.evaluate( () => {
+			window.wp.data.dispatch( 'core/edit-post' ).requestMetaBoxUpdates();
+		} );
+
+		await expect(
+			topBar.getByRole( 'button', { name: 'Publish' } )
+		).toBeDisabled();
+	} );
+} );