C#: Add null guard test involving GetType()

hvitved · hvitved · commit 87bb4a1d56bd · 2019-01-29T16:32:13.000+01:00
diff --git a/csharp/ql/test/library-tests/controlflow/guards/Guards.cs b/csharp/ql/test/library-tests/controlflow/guards/Guards.cs
@@ -262,4 +262,12 @@ void M21(bool b)
             return;
         }
     }
+
+    void M22(object o1, object o2)
+    {
+        if (o1?.GetType() == o2.GetType())
+          o1.ToString(); // null guarded
+        if (o1?.GetType() == o2?.GetType())
+          o1.ToString(); // not null guarded
+    }
 }
