Use this code for ExampleMain Class: @Override public List
getBooks() { if (books != null) { return new ArrayList(books); }
else { return Collections.emptyList(); } } Test Class: private final
AemContext aemContext=new AemContext(); private Author author; @Test
void getBooks() { aemContext.currentResource("/component/author");
author=aemContext.request().adaptTo(Author.class);
assertEquals(4,author.getBooks().size());
assertEquals("JAVA",author.getBooks().get(0));
assertEquals("DS",author.getBoo...