--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.test/src/com/oracle/truffle/ruby/test/RubyTests.java	Mon Jan 06 17:12:09 2014 +0000
@@ -0,0 +1,116 @@
+/*
+ * 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;
+
+import static org.junit.Assert.*;
+
+import java.io.*;
+import java.util.*;
+
+import org.junit.*;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.ruby.nodes.core.*;
+import com.oracle.truffle.ruby.parser.*;
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.configuration.*;
+import com.oracle.truffle.ruby.runtime.core.*;
+
+/**
+ * Base class for Ruby tests.
+ */
+public class RubyTests {
+
+    @BeforeClass
+    public static void applyDefaultLocale() {
+        // Avoid printing comparison issues
+        Locale.setDefault(Locale.ENGLISH);
+    }
+
+    /**
+     * Executes some Ruby code and asserts that it prints an expected string. Remember to include
+     * the newline characters.
+     */
+    public static void assertPrints(String expectedOutput, String code, String... args) {
+        assertPrintsWithInput(expectedOutput, code, "", args);
+    }
+
+    /**
+     * Executes some Ruby code and asserts that it prints an expected string. Remember to include
+     * the newline characters. Allows input for {@code Kernel#gets} to be passed in.
+     */
+    public static void assertPrintsWithInput(String expectedOutput, String code, String input, String... args) {
+        assertPrints(null, expectedOutput, "(test)", code, input, args);
+    }
+
+    /**
+     * Executes some Ruby code of a particular version and asserts that it prints an expected
+     * string. Remember to include the newline characters.
+     */
+    public static void assertPrints(RubyVersion rubyVersion, String expectedOutput, String code, String... args) {
+        ConfigurationBuilder configurationBuilder = new ConfigurationBuilder();
+        configurationBuilder.setRubyVersion(rubyVersion);
+        assertPrints(new Configuration(configurationBuilder), expectedOutput, "(test)", code, "", args);
+    }
+
+    /**
+     * Executes some Ruby code in a file and asserts that it prints an expected string. Remember to
+     * include the newline characters.
+     */
+    public static void assertFilePrints(String expectedOutput, String fileName, String... args) {
+        assertPrints(null, expectedOutput, fileName, null, "", args);
+    }
+
+    /**
+     * Executes some Ruby code and asserts that it prints an expected string. Remember to include
+     * the newline characters. Also takes a string to simulate input.
+     */
+    public static void assertPrints(Configuration configuration, String expectedOutput, String fileName, String code, String input, String... args) {
+        final ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
+        final PrintStream printStream = new PrintStream(byteArray);
+
+        ConfigurationBuilder configurationBuilder;
+
+        if (configuration == null) {
+            configurationBuilder = new ConfigurationBuilder();
+        } else {
+            configurationBuilder = new ConfigurationBuilder(configuration);
+        }
+
+        configurationBuilder.setStandardOut(printStream);
+
+        final BufferedReader inputReader = new BufferedReader(new StringReader(input));
+
+        configurationBuilder.setInputReader(new InputReader() {
+
+            @Override
+            public String readLine(String prompt) throws IOException {
+                return inputReader.readLine();
+            }
+
+        });
+
+        final RubyContext context = new RubyContext(new Configuration(configurationBuilder), new JRubyParser());
+
+        CoreMethodNodeManager.addMethods(context.getCoreLibrary().getObjectClass());
+        context.getCoreLibrary().initializeAfterMethodsAdded();
+
+        for (String arg : args) {
+            context.getCoreLibrary().getArgv().push(new RubyString(context.getCoreLibrary().getStringClass(), arg));
+        }
+
+        final Source source = context.getSourceManager().getFakeFile(fileName, code);
+
+        context.execute(context, source, RubyParser.ParserContext.TOP_LEVEL, context.getCoreLibrary().getMainObject(), null);
+        context.shutdown();
+
+        assertEquals(expectedOutput, byteArray.toString().replaceAll("\r\n", "\n"));
+    }
+}