BAEL-869 - Java 8 example of listing null properties

core-java/src/test/java/com/baeldung/reflection/BaeldungReflectionUtilsTest.java

@@ -0,0 +1,23 @@
+package com.baeldung.reflection;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class BaeldungReflectionUtilsTest {
+
+    @Test
+    public void givenCustomer_whenAFieldIsNull_thenFieldNameInResult() throws Exception {
+        Customer customer = new Customer(1, "Himanshu", null, null);
+
+        List<String> result = BaeldungReflectionUtils.getNullPropertiesList(customer);
+        List<String> expectedFieldNames = Arrays.asList("emailId", "phoneNumber");
+
+        Assert.assertTrue(result.size() == expectedFieldNames.size());
+        Assert.assertTrue(result.containsAll(expectedFieldNames));
+
+    }
+
+}