chore: improve codecov

Author: mdjastrzebski

src/__tests__/screen.test.tsx

@@ -52,6 +52,10 @@ test('screen works with nested re-mounting rerender', () => {
 });
 
 test('screen throws without render', () => {
+  expect(() => screen.root).toThrow('`render` method has not been called');
+  expect(() => screen.UNSAFE_root).toThrow(
+    '`render` method has not been called'
+  );
   expect(() => screen.container).toThrow('`render` method has not been called');
   expect(() => screen.debug()).toThrow('`render` method has not been called');
   expect(() => screen.debug.shallow()).toThrow(