--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/ChildrenNodesTest.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,144 @@
+/*
+ * 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.test;
+
+import java.util.*;
+
+import org.junit.*;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+
+/**
+ * <h3>Creating an Array of Children Nodes</h3>
+ *
+ * <p>
+ * An array of children nodes can be used as a field in a parent node. The field has to be annotated
+ * with {@link com.oracle.truffle.api.nodes.Node.Children} and must be declared private and final.
+ * Before assigning the field in the parent node constructor, {@link Node#adoptChildren} must be
+ * called in order to update the parent pointers in the child nodes. After filling the array with
+ * its first values, it must never be changed. It is only possible to call {@link Node#replace} on a
+ * child node.
+ * </p>
+ *
+ * <p>
+ * The next part of the Truffle API introduction is at
+ * {@link com.oracle.truffle.api.test.FinalFieldTest}.
+ * </p>
+ */
+public class ChildrenNodesTest {
+
+    @Test
+    public void test() {
+        TruffleRuntime runtime = Truffle.getRuntime();
+        TestChildNode firstChild = new TestChildNode();
+        TestChildNode secondChild = new TestChildNode();
+        TestRootNode rootNode = new TestRootNode(new TestChildNode[]{firstChild, secondChild});
+        CallTarget target = runtime.createCallTarget(rootNode);
+        Assert.assertEquals(rootNode, firstChild.getParent());
+        Assert.assertEquals(rootNode, secondChild.getParent());
+        Iterator<Node> iterator = rootNode.getChildren().iterator();
+        Assert.assertEquals(firstChild, iterator.next());
+        Assert.assertEquals(secondChild, iterator.next());
+        Assert.assertFalse(iterator.hasNext());
+        Object result = target.call();
+        Assert.assertEquals(42, result);
+    }
+
+    class TestRootNode extends RootNode {
+
+        @Children private final TestChildNode[] children;
+
+        public TestRootNode(TestChildNode[] children) {
+            super(null);
+            this.children = children;
+        }
+
+        @Override
+        public Object execute(VirtualFrame frame) {
+            int sum = 0;
+            for (int i = 0; i < children.length; ++i) {
+                sum += children[i].execute();
+            }
+            return sum;
+        }
+    }
+
+    class TestChildNode extends Node {
+
+        public TestChildNode() {
+            super(null);
+        }
+
+        public int execute() {
+            return 21;
+        }
+    }
+
+    @Test
+    public void testMultipleChildrenFields() {
+        TruffleRuntime runtime = Truffle.getRuntime();
+        TestChildNode firstChild = new TestChildNode();
+        TestChildNode secondChild = new TestChildNode();
+        TestChildNode thirdChild = new TestChildNode();
+        TestChildNode forthChild = new TestChildNode();
+        TestRootNode rootNode = new TestRoot2Node(new TestChildNode[]{firstChild, secondChild}, new TestChildNode[]{thirdChild, forthChild});
+        CallTarget target = runtime.createCallTarget(rootNode);
+        Assert.assertEquals(rootNode, firstChild.getParent());
+        Assert.assertEquals(rootNode, secondChild.getParent());
+        Assert.assertEquals(rootNode, thirdChild.getParent());
+        Assert.assertEquals(rootNode, forthChild.getParent());
+        Iterator<Node> iterator = rootNode.getChildren().iterator();
+        Assert.assertEquals(firstChild, iterator.next());
+        Assert.assertEquals(secondChild, iterator.next());
+        Assert.assertEquals(thirdChild, iterator.next());
+        Assert.assertEquals(forthChild, iterator.next());
+        Assert.assertFalse(iterator.hasNext());
+        Object result = target.call();
+        Assert.assertEquals(2 * 42, result);
+    }
+
+    class TestRoot2Node extends TestRootNode {
+        @Children private final TestChildNode[] children1;
+        @Children private final TestChildNode[] children2;
+
+        public TestRoot2Node(TestChildNode[] children1, TestChildNode[] children2) {
+            super(new TestChildNode[0]);
+            this.children1 = children1;
+            this.children2 = children2;
+        }
+
+        @Override
+        public Object execute(VirtualFrame frame) {
+            int sum = 0;
+            for (int i = 0; i < children1.length; ++i) {
+                sum += children1[i].execute();
+            }
+            for (int i = 0; i < children2.length; ++i) {
+                sum += children2[i].execute();
+            }
+            return sum;
+        }
+    }
+}