Update unit tests to expect the warnings

packages/components/src/composite/legacy/test/index.tsx

@@ -1,7 +1,12 @@
 /**
  * External dependencies
  */
-import { queryByAttribute, render, screen } from '@testing-library/react';
+import {
+	queryByAttribute,
+	render,
+	screen,
+	renderHook,
+} from '@testing-library/react';
 import { press, waitFor } from '@ariakit/test';
 
 /**
@@ -156,6 +161,57 @@ function getShiftTestItems() {
 	};
 }
 
+// Checking for deprecation warnings before other tests because the `deprecated`
+// utility only fires a console.warn the first time a component is rendered.
+describe( 'Shows a deprecation warning', () => {
+	it( 'useCompositeState', () => {
+		renderHook( () => useCompositeState() );
+		expect( console ).toHaveWarnedWith(
+			'wp.components.__unstableUseCompositeState is deprecated since version 6.7. Please use Composite.useStore instead.'
+		);
+	} );
+	it( 'Composite', () => {
+		const Test = () => {
+			const props = useCompositeState();
+			return <Composite { ...props } />;
+		};
+		render( <Test /> );
+		expect( console ).toHaveWarnedWith(
+			'wp.components.__unstableComposite is deprecated since version 6.7. Please use Composite instead.'
+		);
+	} );
+	it( 'CompositeItem', () => {
+		const Test = () => {
+			const props = useCompositeState();
+			return (
+				<Composite { ...props }>
+					<CompositeItem { ...props } />
+				</Composite>
+			);
+		};
+		render( <Test /> );
+		expect( console ).toHaveWarnedWith(
+			'wp.components.__unstableCompositeItem is deprecated since version 6.7. Please use Composite.Item instead.'
+		);
+	} );
+	it( 'CompositeGroup', () => {
+		const Test = () => {
+			const props = useCompositeState();
+			return (
+				<Composite { ...props }>
+					<CompositeGroup { ...props }>
+						<CompositeItem { ...props } />
+					</CompositeGroup>
+				</Composite>
+			);
+		};
+		render( <Test /> );
+		expect( console ).toHaveWarnedWith(
+			'wp.components.__unstableCompositeGroup is deprecated since version 6.7. Please use Composite.Group or Composite.Row instead.'
+		);
+	} );
+} );
+
 describe.each( [
 	[
 		'With "spread" state',