--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/gc/g1/unloading/check/PhantomizedAssertion.java	Thu May 17 14:52:47 2018 -0700
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package gc.g1.unloading.check;
+
+/**
+ * This assertions checks that classloader will be phantomized.
+ */
+public class PhantomizedAssertion extends Assertion {
+
+    private boolean phantomized = false;
+
+    public void setPhantomized() {
+        phantomized = true;
+    }
+
+    @Override
+    public void check() {
+        if (!phantomized) {
+            throw new RuntimeException("Failing test! Object wasn't phantomized!");
+        }
+    }
+
+}