Add StringConcatFactory to tests to fix missing class warnings
Change-Id: I73fe0605221c0dbe3e0bbf35c7eacab7137f98b8
diff --git a/src/test/javaStubs/StringConcatFactory.java b/src/test/javaStubs/StringConcatFactory.java
new file mode 100644
index 0000000..9863857
--- /dev/null
+++ b/src/test/javaStubs/StringConcatFactory.java
@@ -0,0 +1,7 @@
+// Copyright (c) 2021, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+package java.lang.invoke;
+
+public class StringConcatFactory {}
