--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api.dsl.test/src/com/oracle/truffle/api/dsl/test/AssumptionsTest.java	Mon Jul 01 20:58:32 2013 +0200
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2012, 2012, 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 com.oracle.truffle.api.dsl.test;
+
+import org.junit.*;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.dsl.test.AssumptionsTestFactory.DerivedAssumptionNodeFactory;
+import com.oracle.truffle.api.dsl.test.AssumptionsTestFactory.DerivedAssumptionRedeclaredNodeFactory;
+import com.oracle.truffle.api.dsl.test.AssumptionsTestFactory.MultipleAssumptionsNodeFactory;
+import com.oracle.truffle.api.dsl.test.AssumptionsTestFactory.SingleAssumptionNodeFactory;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.TestRootNode;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;
+
+public class AssumptionsTest {
+
+    @Test
+    public void testSingleAssumption() {
+        Assumption assumption = Truffle.getRuntime().createAssumption();
+        TestRootNode<?> root = TestHelper.createRoot(SingleAssumptionNodeFactory.getInstance(), assumption);
+
+        Assert.assertEquals(42, TestHelper.executeWith(root));
+        assumption.invalidate();
+        Assert.assertEquals("42", TestHelper.executeWith(root));
+    }
+
+    @NodeAssumptions("assumption")
+    abstract static class SingleAssumptionNode extends ValueNode {
+
+        @Specialization(order = 0, assumptions = "assumption")
+        int doInt() {
+            return 42;
+        }
+
+        @Specialization
+        Object doObject() {
+            return "42";
+        }
+    }
+
+    @Test
+    public void testMultipleAssumption() {
+        Assumption assumption1 = Truffle.getRuntime().createAssumption();
+        Assumption assumption2 = Truffle.getRuntime().createAssumption();
+        TestRootNode<?> root = TestHelper.createRoot(MultipleAssumptionsNodeFactory.getInstance(), assumption1, assumption2);
+
+        Assert.assertEquals(42, TestHelper.executeWith(root));
+        assumption2.invalidate();
+        Assert.assertEquals("42", TestHelper.executeWith(root));
+        assumption1.invalidate();
+        Assert.assertEquals("43", TestHelper.executeWith(root));
+    }
+
+    @NodeAssumptions({"assumption1", "assumption2"})
+    abstract static class MultipleAssumptionsNode extends ValueNode {
+
+        @Specialization(assumptions = {"assumption1", "assumption2"})
+        int doInt() {
+            return 42;
+        }
+
+        @Specialization(assumptions = "assumption1")
+        Object doObject() {
+            return "42";
+        }
+
+        @Generic
+        Object doGeneric() {
+            return "43";
+        }
+    }
+
+    @Test
+    public void testDerivedAssumption() {
+        Assumption additionalAssumption = Truffle.getRuntime().createAssumption();
+        Assumption assumption = Truffle.getRuntime().createAssumption();
+        TestRootNode<?> root = TestHelper.createRoot(DerivedAssumptionNodeFactory.getInstance(), assumption, additionalAssumption);
+
+        Assert.assertEquals(42, TestHelper.executeWith(root));
+        assumption.invalidate();
+        Assert.assertEquals(43, TestHelper.executeWith(root));
+        additionalAssumption.invalidate();
+        Assert.assertEquals("42", TestHelper.executeWith(root));
+    }
+
+    @NodeAssumptions({"additionalAssumption"})
+    abstract static class DerivedAssumptionNode extends SingleAssumptionNode {
+
+        @Specialization(order = 1, assumptions = "additionalAssumption")
+        int doIntDerived() {
+            return 43;
+        }
+    }
+
+    @Test
+    public void testDerivedAssumptionRedeclared() {
+        Assumption additionalAssumption = Truffle.getRuntime().createAssumption();
+        Assumption assumption = Truffle.getRuntime().createAssumption();
+        TestRootNode<?> root = TestHelper.createRoot(DerivedAssumptionRedeclaredNodeFactory.getInstance(), additionalAssumption, assumption);
+
+        Assert.assertEquals(42, TestHelper.executeWith(root));
+        assumption.invalidate();
+        Assert.assertEquals(43, TestHelper.executeWith(root));
+        additionalAssumption.invalidate();
+        Assert.assertEquals("42", TestHelper.executeWith(root));
+    }
+
+    @NodeAssumptions({"additionalAssumption", "assumption"})
+    abstract static class DerivedAssumptionRedeclaredNode extends SingleAssumptionNode {
+
+        @Specialization(order = 1, assumptions = "additionalAssumption")
+        int doIntDerived() {
+            return 43;
+        }
+
+    }
+
+}