--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.api.dsl.test/src/com/oracle/truffle/api/dsl/test/SourceSectionTest.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2014, 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 static com.oracle.truffle.api.dsl.test.TestHelper.*;
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import org.junit.*;
+import org.junit.experimental.theories.*;
+import org.junit.runner.*;
+
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.dsl.internal.*;
+import com.oracle.truffle.api.dsl.test.SourceSectionTestFactory.SourceSection0Factory;
+import com.oracle.truffle.api.dsl.test.SourceSectionTestFactory.SourceSection1Factory;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ArgumentNode;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.TestRootNode;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.api.source.*;
+
+@RunWith(Theories.class)
+public class SourceSectionTest {
+
+    @DataPoints public static final int[] data = new int[]{1, 2, 3, 4};
+
+    @Theory
+    public void testSourceSections(int value0, int value1, int value2) {
+        TestRootNode<SourceSection0> root = createRoot(SourceSection0Factory.getInstance());
+        SourceSection section = new NullSourceSection("a", "b");
+        root.getNode().assignSourceSection(section);
+        expectSourceSection(root.getNode(), section);
+        assertThat((int) executeWith(root, value0), is(value0));
+        expectSourceSection(root.getNode(), section);
+        assertThat((int) executeWith(root, value1), is(value1));
+        expectSourceSection(root.getNode(), section);
+        assertThat((int) executeWith(root, value2), is(value2));
+        expectSourceSection(root.getNode(), section);
+    }
+
+    private static void expectSourceSection(Node root, SourceSection section) {
+        assertThat(root.getSourceSection(), is(sameInstance(section)));
+        for (Node child : root.getChildren()) {
+            if (child instanceof ArgumentNode || child instanceof SpecializationNode) {
+                continue;
+            }
+            if (child != null) {
+                expectSourceSection(child, section);
+            }
+        }
+    }
+
+    @NodeChild("a")
+    static class SourceSection0 extends ValueNode {
+
+        @Specialization(guards = "a == 1")
+        int do1(int a) {
+            return a;
+        }
+
+        @Specialization(guards = "a == 2")
+        int do2(int a) {
+            return a;
+        }
+
+        @Specialization(guards = "a == 3")
+        int do3(int a) {
+            return a;
+        }
+
+        @Fallback
+        Object do4(Object a) {
+            return a; // the generic answer to all questions
+        }
+    }
+
+    @Test
+    public void testCreateCast() {
+        SourceSection section = new NullSourceSection("a", "b");
+        TestRootNode<SourceSection1> root = createRootPrefix(SourceSection1Factory.getInstance(), true, section);
+        expectSourceSection(root.getNode(), section);
+        assertThat((int) executeWith(root, 1), is(1));
+        expectSourceSection(root.getNode(), section);
+    }
+
+    @NodeChild("a")
+    static class SourceSection1 extends ValueNode {
+
+        public SourceSection1(SourceSection section) {
+            super(section);
+        }
+
+        @CreateCast("a")
+        public ValueNode cast(ValueNode node) {
+            assert getSourceSection() != null;
+            return node;
+        }
+
+        @Specialization
+        int do0(int a) {
+            return a;
+        }
+
+    }
+}