--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/GraalCompilerAssumptionsTest.java	2017-02-15 16:57:34.194899377 -0800
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2015, 2016, 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 org.graalvm.compiler.core.test;
+
+import org.graalvm.compiler.code.CompilationResult;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
+
+import jdk.vm.ci.code.Architecture;
+import jdk.vm.ci.code.InstalledCode;
+import jdk.vm.ci.meta.Assumptions.Assumption;
+import jdk.vm.ci.meta.ResolvedJavaMethod;
+import jdk.vm.ci.meta.ResolvedJavaType;
+
+public abstract class GraalCompilerAssumptionsTest extends GraalCompilerTest {
+
+    public GraalCompilerAssumptionsTest() {
+        super();
+    }
+
+    public GraalCompilerAssumptionsTest(Class<? extends Architecture> arch) {
+        super(arch);
+    }
+
+    protected void testAssumptionInvalidate(String methodName, Assumption expected, String classToLoad) {
+        testAssumption(methodName, expected, classToLoad, true);
+    }
+
+    /**
+     * Checks the behavior of class loading on {@link Assumption invalidation}. {@code methodName}
+     * is compiled and the resulting graph is checked for {@code expectedAssumption}. The code is
+     * installed and optionally {@code classToLoad} is loaded. The class is assumed to be an inner
+     * class of the test class and the name of the class to load is constructed relative to that.
+     *
+     * @param methodName the method to compile
+     * @param expectedAssumption expected {@link Assumption} instance to find in graph
+     * @param classToLoad an optional class to load to trigger an invalidation check
+     * @param willInvalidate true if loading {@code classToLoad} should invalidate the method
+     */
+    protected void testAssumption(String methodName, Assumption expectedAssumption, String classToLoad, boolean willInvalidate) {
+        ResolvedJavaMethod javaMethod = getResolvedJavaMethod(methodName);
+
+        StructuredGraph graph = parseEager(javaMethod, AllowAssumptions.YES);
+        assertTrue(!graph.getAssumptions().isEmpty());
+        checkGraph(expectedAssumption, graph);
+
+        CompilationResult compilationResult = compile(javaMethod, graph);
+        final InstalledCode installedCode = getBackend().createDefaultInstalledCode(javaMethod, compilationResult);
+        assertTrue(installedCode.isValid());
+        if (classToLoad != null) {
+            String fullName = getClass().getName() + "$" + classToLoad;
+            try {
+                Class.forName(fullName);
+            } catch (ClassNotFoundException e) {
+                fail("Can't find class %s", fullName);
+            }
+            assertTrue(!willInvalidate == installedCode.isValid(), "method should be %s", willInvalidate ? "invalid" : "valid");
+        }
+    }
+
+    protected void checkGraph(Assumption expectedAssumption, StructuredGraph graph) {
+        boolean found = false;
+        for (Assumption a : graph.getAssumptions()) {
+            if (expectedAssumption.equals(a)) {
+                found = true;
+            }
+        }
+        assertTrue(found, "Can't find assumption %s", expectedAssumption);
+    }
+
+    /**
+     * Converts a {@link Class} to an initialized {@link ResolvedJavaType}.
+     */
+    protected ResolvedJavaType resolveAndInitialize(Class<?> clazz) {
+        ResolvedJavaType type = getMetaAccess().lookupJavaType(clazz);
+        type.initialize();
+        return type;
+    }
+}