--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/ChildNodeTest.java	Wed Dec 02 15:16:27 2015 +0100
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2012, 2013, 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;
+
+import com.oracle.truffle.api.CallTarget;
+import com.oracle.truffle.api.Truffle;
+import com.oracle.truffle.api.TruffleRuntime;
+import com.oracle.truffle.api.frame.VirtualFrame;
+import com.oracle.truffle.api.nodes.Node;
+import com.oracle.truffle.api.nodes.Node.Child;
+import com.oracle.truffle.api.nodes.RootNode;
+import com.oracle.truffle.api.utilities.InstrumentationTestMode;
+
+import java.util.Iterator;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * <h3>Creating a Child Node</h3>
+ *
+ * <p>
+ * Child nodes are stored in the class of the parent node in fields that are marked with the
+ * {@link Child} annotation. The {@link Node#getParent()} method allows access to this field. Every
+ * node also provides the ability to iterate over its children using {@link Node#getChildren()}.
+ * </p>
+ *
+ * <p>
+ * A child node field must be declared private and non-final. It may only be assigned in the
+ * constructor of the parent node. For changing the structure of the tree at run time, the method
+ * {@link Node#replace(Node)} must be used (see {@link ReplaceTest}).
+ * </p>
+ *
+ * <p>
+ * The next part of the Truffle API introduction is at
+ * {@link com.oracle.truffle.api.ChildrenNodesTest}.
+ * </p>
+ */
+public class ChildNodeTest {
+
+    @Before
+    public void before() {
+        InstrumentationTestMode.set(true);
+    }
+
+    @After
+    public void after() {
+        InstrumentationTestMode.set(false);
+    }
+
+    @Test
+    public void test() {
+        TruffleRuntime runtime = Truffle.getRuntime();
+        TestChildNode leftChild = new TestChildNode();
+        TestChildNode rightChild = new TestChildNode();
+        TestRootNode rootNode = new TestRootNode(leftChild, rightChild);
+        CallTarget target = runtime.createCallTarget(rootNode);
+        Assert.assertEquals(rootNode, leftChild.getParent());
+        Assert.assertEquals(rootNode, rightChild.getParent());
+        Iterator<Node> iterator = rootNode.getChildren().iterator();
+        Assert.assertEquals(leftChild, iterator.next());
+        Assert.assertEquals(rightChild, iterator.next());
+        Assert.assertFalse(iterator.hasNext());
+        Object result = target.call();
+        Assert.assertEquals(42, result);
+    }
+
+    class TestRootNode extends RootNode {
+
+        @Child private TestChildNode left;
+        @Child private TestChildNode right;
+
+        public TestRootNode(TestChildNode left, TestChildNode right) {
+            super(TestingLanguage.class, null, null);
+            this.left = left;
+            this.right = right;
+        }
+
+        @Override
+        public Object execute(VirtualFrame frame) {
+            return left.execute() + right.execute();
+        }
+    }
+
+    class TestChildNode extends Node {
+
+        public TestChildNode() {
+            super(null);
+        }
+
+        public int execute() {
+            return 21;
+        }
+    }
+}