Unit test case for Sling delegation pattern

Hi,

I would like to write test cases for sling delegation pattern. I did find a few articles which pointed me in the right direction but I'm still unable to get the core components properties. Could anyone help in writing a minimal test case for a sling delegation model? Below is my code.

https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/junit-test-cases-for-sling-models-based-on-delegation-pattern/m-p/437458/highlight/true#M124890

https://adapt.to/2021/schedule/whats-new-in-aem-mocks

https://github.com/adobe/aem-core-wcm-components/issues/1777

https://github.com/adobe/aem-core-wcm-components/blob/main/testing/aem-mock-plugin/src/test/java/com/adobe/cq/wcm/core/components/testing/mock/CoreComponentsMockTest.java

@ExtendWith(AemContextExtension.class)
public class CustomTextFormTest{

    private final AemContext context = new AemContextBuilder(ResourceResolverType.JCR_MOCK)
            .plugin(CORE_COMPONENTS)
            .build();

    private CustomTextForm customTextForm;

    @BeforeEach
    void setUp() {
        context.create().resource("/apps/myproject/components/content/coreform/text",
                "sling:resourceSuperType", "core/wcm/components/form/text/v2/text");

        Page page = context.create().page("/content/test-page");

        context.currentResource(context.create().resource(page, "extendedText",
                "sling:resourceType", "myproject/components/content/coreform/text",
                "required", "true",
                "requiredMessage","Required message when required checkbox is true"
        ));

        customTextForm= context.request().adaptTo(FormTextModel.class);
    }

    @Test
    void testGetRequiredMessageWhenMsgIsAuthoredAndRequiredCheckBoxIsTrue() {
        String expected = "Required message when required checkbox is true";
        String actual = customTextForm.getRequiredMessage();
        assertEquals(expected, actual);
    }
}