RNMobile: Add integration test to verify button block border radius f…

…unctionality (#33211)

* Add setup for button radius test

* Tweak query in test

* Clean up bottons tests

* Clean up buttons test further

* RNMobile: Fix reusable block test assertion

The test should assert the existance of a React element but because of a missing `await`, was instead asserting an unresolved Promise instead. Since the unresolved Promise is a value, `toBeDefined` was returning `true` and the test was passing.
Fixing the test involves resolving the Promise using `await` so that what's asserted is an actual React element.

* Update useResizeObserver mock

Co-authored-by: Carlos Garcia <fluiddot@gmail.com>

packages/block-library/src/block/test/edit.native.js

@@ -182,7 +182,7 @@ describe( 'Reusable block', () => {
 			},
 		} );
 
-		const headingInnerBlock = waitFor( () =>
+		const headingInnerBlock = await waitFor( () =>
 			within( reusableBlock ).getByA11yLabel(
 				'Heading Block. Row 1. Level 2. First Reusable block'
 			)

test/native/setup.js

@@ -190,3 +190,14 @@ jest.mock( 'react-native/Libraries/Components/Switch/Switch', () => {
 		'react-native/Libraries/Components/Switch/Switch'
 	);
 } );
+
+jest.mock( '@wordpress/compose', () => {
+	return {
+		...jest.requireActual( '@wordpress/compose' ),
+		useViewportMatch: jest.fn(),
+		useResizeObserver: jest.fn( () => [
+			mockComponent( 'ResizeObserverMock' )( {} ),
+			{ width: 100, height: 100 },
+		] ),
+	};
+} );