### Question:
SimpleTypeRegistry { public static boolean isSimpleType(Class<?> clazz) { return SIMPLE_TYPE_SET.contains(clazz); } private  SimpleTypeRegistry(); static boolean isSimpleType(Class<?> clazz);  }### Answer:
@Test void shouldTestIfClassIsSimpleTypeAndReturnTrue() { assertTrue(SimpleTypeRegistry.isSimpleType(String.class)); }
@Test void shouldTestIfClassIsSimpleTypeAndReturnFalse() { assertFalse(SimpleTypeRegistry.isSimpleType(RichType.class)); }
@Test void shouldTestIfMapIsSimpleTypeAndReturnFalse() { assertFalse(SimpleTypeRegistry.isSimpleType(HashMap.class)); }
@Test public void shouldTestIfClassIsSimpleTypeAndReturnTrue() { assertTrue(SimpleTypeRegistry.isSimpleType(String.class)); }
@Test public void shouldTestIfClassIsSimpleTypeAndReturnFalse() { assertFalse(SimpleTypeRegistry.isSimpleType(RichType.class)); }
@Test public void shouldTestIfMapIsSimpleTypeAndReturnFalse() { assertFalse(SimpleTypeRegistry.isSimpleType(HashMap.class)); }