Editor: Add e2e test.

packages/e2e-tests/specs/editor/various/change-detection.test.js

@@ -7,6 +7,7 @@ import {
 	pressKeyWithModifier,
 	ensureSidebarOpened,
 	publishPost,
+	openDocumentSettingsSidebar,
 } from '@wordpress/e2e-test-utils';
 
 describe( 'Change detection', () => {
@@ -348,4 +349,25 @@ describe( 'Change detection', () => {
 		// Verify that the post is not dirty.
 		await assertIsDirty( false );
 	} );
+
+	it( 'should not prompt to confirm unsaved changes when trashing an existing post', async () => {
+		// Enter title.
+		await page.type( '.editor-post-title__input', 'Hello World' );
+
+		// Save
+		await Promise.all( [
+			// Wait for "Saved" to confirm save complete.
+			page.waitForSelector( '.editor-post-saved-state.is-saved' ),
+
+			// Keyboard shortcut Ctrl+S save.
+			pressKeyWithModifier( 'primary', 'S' ),
+		] );
+
+		// Trash post.
+		await openDocumentSettingsSidebar();
+		await page.click( '.editor-post-trash.components-button' );
+
+		// Check that the dialog didn't show.
+		await assertIsDirty( false );
+	} );
 } );