--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.test/src/com/oracle/truffle/ruby/test/core/HashTests.java	Mon Jan 06 17:12:09 2014 +0000
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.test.core;
+
+import org.junit.*;
+
+import com.oracle.truffle.ruby.test.*;
+
+/**
+ * Test the {@code Hash} class.
+ */
+public class HashTests extends RubyTests {
+
+    @Test
+    public void testLiteral() {
+        assertPrints("Hash\n", "puts ({}).class");
+        assertPrints("Hash\n", "puts ({1 => 2, 3 => 4}).class");
+        assertPrints("Hash\n", "puts ({key1: 2, key3: 4}).class");
+    }
+
+    @Test
+    public void testIndex() {
+        assertPrints("4\n", "foo = {1 => 2, 3 => 4}; puts foo[3]");
+    }
+
+    @Test
+    public void testIndexSet() {
+        assertPrints("6\n", "foo = {1 => 2, 3 => 4}; foo[5] = 6; puts foo[5]");
+    }
+
+    @Test
+    public void testKeys() {
+        assertPrints("[1, 3]\n", "foo = {1 => 2, 3 => 4}; puts foo.keys.to_s");
+    }
+
+}