Migrate Heading block tests to Playwright (#47955)

* Migrate Heading block tests to Playwright

* Open document settings before color tests

* Use the new recommended method

* Update remaining assertions

test/e2e/specs/editor/blocks/heading.spec.js

@@ -0,0 +1,182 @@
+/**
+ * WordPress dependencies
+ */
+const { test, expect } = require( '@wordpress/e2e-test-utils-playwright' );
+
+test.describe( 'Heading', () => {
+	test.beforeEach( async ( { admin } ) => {
+		await admin.createNewPost();
+	} );
+
+	test( 'can be created by prefixing number sign and a space', async ( {
+		editor,
+		page,
+	} ) => {
+		await page.click( 'role=button[name="Add default block"i]' );
+		await page.keyboard.type( '### 3' );
+
+		await expect.poll( editor.getBlocks ).toMatchObject( [
+			{
+				name: 'core/heading',
+				attributes: { content: '3', level: 3 },
+			},
+		] );
+	} );
+
+	test( 'can be created by prefixing existing content with number signs and a space', async ( {
+		editor,
+		page,
+	} ) => {
+		await page.click( 'role=button[name="Add default block"i]' );
+		await page.keyboard.type( '4' );
+		await page.keyboard.press( 'ArrowLeft' );
+		await page.keyboard.type( '#### ' );
+
+		await expect.poll( editor.getBlocks ).toMatchObject( [
+			{
+				name: 'core/heading',
+				attributes: { content: '4', level: 4 },
+			},
+		] );
+	} );
+
+	test( 'should not work with the list input rule', async ( {
+		editor,
+		page,
+	} ) => {
+		await page.click( 'role=button[name="Add default block"i]' );
+		await page.keyboard.type( '## 1. H' );
+
+		await expect.poll( editor.getBlocks ).toMatchObject( [
+			{
+				name: 'core/heading',
+				attributes: { content: '1. H', level: 2 },
+			},
+		] );
+	} );
+
+	test( 'should work with the format input rules', async ( {
+		editor,
+		page,
+	} ) => {
+		await page.click( 'role=button[name="Add default block"i]' );
+		await page.keyboard.type( '## `code`' );
+
+		await expect.poll( editor.getBlocks ).toMatchObject( [
+			{
+				name: 'core/heading',
+				attributes: { content: '<code>code</code>', level: 2 },
+			},
+		] );
+	} );
+
+	test( 'should create a paragraph block above when pressing enter at the start', async ( {
+		editor,
+		page,
+	} ) => {
+		await page.keyboard.press( 'Enter' );
+		await page.keyboard.type( '## a' );
+		await page.keyboard.press( 'ArrowLeft' );
+		await page.keyboard.press( 'Enter' );
+
+		await expect.poll( editor.getBlocks ).toMatchObject( [
+			{
+				name: 'core/paragraph',
+				attributes: { content: '' },
+			},
+			{
+				name: 'core/heading',
+				attributes: { content: 'a', level: 2 },
+			},
+		] );
+	} );
+
+	test( 'should create a paragraph block below when pressing enter at the end', async ( {
+		editor,
+		page,
+	} ) => {
+		await page.keyboard.press( 'Enter' );
+		await page.keyboard.type( '## a' );
+		await page.keyboard.press( 'Enter' );
+
+		await expect.poll( editor.getBlocks ).toMatchObject( [
+			{
+				name: 'core/heading',
+				attributes: { content: 'a', level: 2 },
+			},
+			{
+				name: 'core/paragraph',
+				attributes: { content: '' },
+			},
+		] );
+	} );
+
+	test( 'should correctly apply custom colors', async ( {
+		editor,
+		page,
+	} ) => {
+		await page.click( 'role=button[name="Add default block"i]' );
+		await page.keyboard.type( '### Heading' );
+		await editor.openDocumentSettingsSidebar();
+
+		const textColor = page
+			.getByRole( 'region', {
+				name: 'Editor settings',
+			} )
+			.getByRole( 'button', { name: 'Text' } );
+
+		await textColor.click();
+		await page
+			.getByRole( 'button', { name: /Custom color picker./i } )
+			.click();
+
+		await page
+			.getByRole( 'textbox', { name: 'Hex color' } )
+			.fill( '4b7f4d' );
+
+		await expect.poll( editor.getBlocks ).toMatchObject( [
+			{
+				name: 'core/heading',
+				attributes: {
+					content: 'Heading',
+					level: 3,
+					style: { color: { text: '#4b7f4d' } },
+				},
+			},
+		] );
+	} );
+
+	test( 'should correctly apply named colors', async ( { editor, page } ) => {
+		await page.click( 'role=button[name="Add default block"i]' );
+		await page.keyboard.type( '## Heading' );
+		await editor.openDocumentSettingsSidebar();
+
+		const textColor = page
+			.getByRole( 'region', {
+				name: 'Editor settings',
+			} )
+			.getByRole( 'button', { name: 'Text' } );
+
+		await textColor.click();
+
+		await page
+			.getByRole( 'button', {
+				name: 'Color: Luminous vivid orange',
+			} )
+			.click();
+
+		// Close the popover.
+		await textColor.click();
+
+		await expect.poll( editor.getBlocks ).toMatchObject( [
+			{
+				name: 'core/heading',
+				attributes: {
+					content: 'Heading',
+					level: 2,
+					textColor: 'luminous-vivid-orange',
+				},
+			},
+		] );
+	} );
+} );