A test to ensure that null values override default values when nulls are present in input Json during deserialization.

gson/src/test/java/com/google/gson/functional/NullObjectAndFieldTest.java

@@ -166,4 +166,15 @@ public class NullObjectAndFieldTest extends TestCase {
       return obj;
     }
   }
+
+  public void testExplicitNullSetsFieldToNullDuringDeserialization() {
+    Gson gson = new Gson();
+    String json = "{value:null}";
+    ObjectWithField obj = gson.fromJson(json, ObjectWithField.class);
+    assertNull(obj.value);    
+  }
+  
+  private static class ObjectWithField {
+    String value = "";
+  }
 }