Test block insertion after blurring post title field

Relates to #32831. Adds tests asserting that block inserter inserts new
blocks in the correct position after blurring the post title field.

packages/edit-post/src/components/visual-editor/test/index.native.js

@@ -0,0 +1,93 @@
+/**
+ * External dependencies
+ */
+import { initializeEditor, fireEvent } from 'test/helpers';
+
+/**
+ * WordPress dependencies
+ */
+import { getBlockTypes, unregisterBlockType } from '@wordpress/blocks';
+import { registerCoreBlocks } from '@wordpress/block-library';
+
+beforeAll( () => {
+	// Register all core blocks
+	registerCoreBlocks();
+} );
+
+afterAll( () => {
+	// Clean up registered blocks
+	getBlockTypes().forEach( ( block ) => {
+		unregisterBlockType( block.name );
+	} );
+} );
+
+const initialHtml = `
+<!-- wp:paragraph -->
+<p>First example paragraph.</p>
+<!-- /wp:paragraph -->
+
+<!-- wp:paragraph -->
+<p>Second example paragraph.</p>
+<!-- /wp:paragraph -->
+`;
+
+describe( 'when title is focused', () => {
+	it( 'new blocks are inserted after the title', async () => {
+		const screen = await initializeEditor( {
+			initialHtml,
+		} );
+
+		// Focus first block
+		fireEvent.press( screen.getByA11yLabel( /Paragraph Block. Row 1/ ) );
+
+		// Focus title
+		fireEvent(
+			screen.getAllByA11yLabel( 'Post title. test' )[ 0 ],
+			'select'
+		);
+
+		// Add new Heading block
+		fireEvent.press( screen.getByA11yLabel( 'Add block' ) );
+		fireEvent.press( screen.getByText( 'Heading' ) );
+
+		expect( screen.getByA11yLabel( /Heading Block. Row 1/ ) ).toBeDefined();
+		expect(
+			screen.getByA11yLabel( /Paragraph Block. Row 2/ )
+		).toBeDefined();
+		expect(
+			screen.getByA11yLabel( /Paragraph Block. Row 3/ )
+		).toBeDefined();
+	} );
+} );
+
+describe( 'when title is no longer focused', () => {
+	it( 'new blocks are inserted after the currently focused block', async () => {
+		const screen = await initializeEditor( {
+			initialHtml,
+		} );
+
+		// Focus first block
+		fireEvent.press( screen.getByA11yLabel( /Paragraph Block. Row 1/ ) );
+
+		// Focus title
+		fireEvent(
+			screen.getAllByA11yLabel( 'Post title. test' )[ 0 ],
+			'select'
+		);
+
+		// Focus last block
+		fireEvent.press( screen.getByA11yLabel( /Paragraph Block. Row 2/ ) );
+
+		// Add new Heading block
+		fireEvent.press( screen.getByA11yLabel( 'Add block' ) );
+		fireEvent.press( screen.getByText( 'Heading' ) );
+
+		expect(
+			screen.getByA11yLabel( /Paragraph Block. Row 1/ )
+		).toBeDefined();
+		expect(
+			screen.getByA11yLabel( /Paragraph Block. Row 2/ )
+		).toBeDefined();
+		expect( screen.getByA11yLabel( /Heading Block. Row 3/ ) ).toBeDefined();
+	} );
+} );