--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/utilities/TextMapTest.java	Sun Dec 22 15:12:40 2013 -0800
@@ -0,0 +1,202 @@
+/*
+ * Copyright (c) 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.utilities;
+
+import static org.junit.Assert.*;
+
+import org.junit.*;
+
+import com.oracle.truffle.api.source.*;
+
+public class TextMapTest {
+
+    final TextMap emptyTextMap = new TextMap("");
+
+    final TextMap emptyLineMap = new TextMap("\n");
+
+    private final TextMap shortMap = new TextMap("01");
+
+    private final TextMap longMap = new TextMap("01234\n67\n9\n");
+
+    @Test
+    public void emptyTextTest0() {
+        assertEquals(emptyTextMap.lineCount(), 0);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyTextTest1() {
+        emptyTextMap.offsetToLine(0);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyTextTest2() {
+        emptyTextMap.offsetToCol(0);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyTextTest3() {
+        emptyTextMap.lineStartOffset(-1);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyTextTest4() {
+        emptyTextMap.lineStartOffset(0);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyTextTest5() {
+        emptyTextMap.lineStartOffset(1);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyTextTest6() {
+        emptyTextMap.lineLength(1);
+    }
+
+    @Test
+    public void emptyLineTest0() {
+        assertEquals(emptyLineMap.lineCount(), 1);
+        assertEquals(emptyLineMap.offsetToLine(0), 1);
+        assertEquals(emptyLineMap.lineStartOffset(1), 0);
+        assertEquals(emptyLineMap.offsetToCol(0), 1);
+        assertEquals(emptyLineMap.lineLength(1), 0);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyLineTest1() {
+        emptyLineMap.offsetToLine(1);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyLineTest2() {
+        emptyLineMap.lineStartOffset(2);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyLineTest3() {
+        emptyLineMap.offsetToCol(1);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void emptyLineTest4() {
+        emptyLineMap.lineLength(2);
+    }
+
+    @Test
+    public void shortTextTest0() {
+
+        assertEquals(shortMap.lineCount(), 1);
+
+        assertEquals(shortMap.offsetToLine(0), 1);
+        assertEquals(shortMap.lineStartOffset(1), 0);
+        assertEquals(shortMap.offsetToCol(0), 1);
+
+        assertEquals(shortMap.offsetToLine(1), 1);
+        assertEquals(shortMap.offsetToCol(1), 2);
+
+        assertEquals(shortMap.lineLength(1), 2);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void shortTextTest1() {
+        shortMap.offsetToLine(-1);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void shortTextTest2() {
+        shortMap.offsetToCol(-1);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void shortTextTest3() {
+        shortMap.offsetToLine(2);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void shortTextTest4() {
+        shortMap.offsetToCol(2);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void shortTextTest5() {
+        shortMap.lineStartOffset(2);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void shortTextTest6() {
+        shortMap.lineLength(2);
+    }
+
+    @Test
+    public void longTextTest0() {
+
+        assertEquals(longMap.lineCount(), 3);
+
+        assertEquals(longMap.offsetToLine(0), 1);
+        assertEquals(longMap.lineStartOffset(1), 0);
+        assertEquals(longMap.offsetToCol(0), 1);
+
+        assertEquals(longMap.offsetToLine(4), 1);
+        assertEquals(longMap.offsetToCol(4), 5);
+
+        assertEquals(longMap.offsetToLine(5), 1); // newline
+        assertEquals(longMap.offsetToCol(5), 6); // newline
+        assertEquals(longMap.lineLength(1), 5);
+
+        assertEquals(longMap.offsetToLine(6), 2);
+        assertEquals(longMap.lineStartOffset(2), 6);
+        assertEquals(longMap.offsetToCol(6), 1);
+
+        assertEquals(longMap.offsetToLine(7), 2);
+        assertEquals(longMap.offsetToCol(7), 2);
+
+        assertEquals(longMap.offsetToLine(8), 2); // newline
+        assertEquals(longMap.offsetToLine(8), 2); // newline
+        assertEquals(longMap.lineLength(2), 2);
+
+        assertEquals(longMap.offsetToLine(9), 3);
+        assertEquals(longMap.lineStartOffset(3), 9);
+        assertEquals(longMap.offsetToCol(9), 1);
+
+        assertEquals(longMap.offsetToLine(10), 3); // newline
+        assertEquals(longMap.offsetToCol(10), 2); // newline
+        assertEquals(longMap.lineLength(3), 1);
+
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void longTextTest1() {
+        longMap.offsetToLine(11);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void longTextTest2() {
+        longMap.offsetToCol(11);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void longTextTest3() {
+        longMap.lineStartOffset(4);
+    }
+
+}