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diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/BlockListTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/BlockListTest.java
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+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/BlockListTest.java
@@ -0,0 +1,336 @@
+/*
+ * Copyright (C) 2011, Google Inc.
+ * and other copyright owners as documented in the project's IP log.
+ *
+ * This program and the accompanying materials are made available
+ * under the terms of the Eclipse Distribution License v1.0 which
+ * accompanies this distribution, is reproduced below, and is
+ * available at http://www.eclipse.org/org/documents/edl-v10.php
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials provided
+ *   with the distribution.
+ *
+ * - Neither the name of the Eclipse Foundation, Inc. nor the
+ *   names of its contributors may be used to endorse or promote
+ *   products derived from this software without specific prior
+ *   written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.eclipse.jgit.util;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Iterator;
+
+import org.junit.Test;
+
+public class BlockListTest {
+	@Test
+	public void testEmptyList() {
+		BlockList<String> empty;
+
+		empty = new BlockList<String>();
+		assertEquals(0, empty.size());
+		assertTrue(empty.isEmpty());
+		assertFalse(empty.iterator().hasNext());
+
+		empty = new BlockList<String>(0);
+		assertEquals(0, empty.size());
+		assertTrue(empty.isEmpty());
+		assertFalse(empty.iterator().hasNext());
+
+		empty = new BlockList<String>(1);
+		assertEquals(0, empty.size());
+		assertTrue(empty.isEmpty());
+		assertFalse(empty.iterator().hasNext());
+
+		empty = new BlockList<String>(64);
+		assertEquals(0, empty.size());
+		assertTrue(empty.isEmpty());
+		assertFalse(empty.iterator().hasNext());
+	}
+
+	@Test
+	public void testGet() {
+		BlockList<String> list = new BlockList<String>(4);
+
+		try {
+			list.get(-1);
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(-1), badIndex.getMessage());
+		}
+
+		try {
+			list.get(0);
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(0), badIndex.getMessage());
+		}
+
+		try {
+			list.get(4);
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(4), badIndex.getMessage());
+		}
+
+		String fooStr = "foo";
+		String barStr = "bar";
+		String foobarStr = "foobar";
+
+		list.add(fooStr);
+		list.add(barStr);
+		list.add(foobarStr);
+
+		assertSame(fooStr, list.get(0));
+		assertSame(barStr, list.get(1));
+		assertSame(foobarStr, list.get(2));
+
+		try {
+			list.get(3);
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(3), badIndex.getMessage());
+		}
+	}
+
+	@Test
+	public void testSet() {
+		BlockList<String> list = new BlockList<String>(4);
+
+		try {
+			list.set(-1, "foo");
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(-1), badIndex.getMessage());
+		}
+
+		try {
+			list.set(0, "foo");
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(0), badIndex.getMessage());
+		}
+
+		try {
+			list.set(4, "foo");
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(4), badIndex.getMessage());
+		}
+
+		String fooStr = "foo";
+		String barStr = "bar";
+		String foobarStr = "foobar";
+
+		list.add(fooStr);
+		list.add(barStr);
+		list.add(foobarStr);
+
+		assertSame(fooStr, list.get(0));
+		assertSame(barStr, list.get(1));
+		assertSame(foobarStr, list.get(2));
+
+		assertSame(fooStr, list.set(0, barStr));
+		assertSame(barStr, list.set(1, fooStr));
+
+		assertSame(barStr, list.get(0));
+		assertSame(fooStr, list.get(1));
+
+		try {
+			list.set(3, "bar");
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(3), badIndex.getMessage());
+		}
+	}
+
+	@Test
+	public void testAddToEnd() {
+		BlockList<Integer> list = new BlockList<Integer>(4);
+		int cnt = BlockList.BLOCK_SIZE * 3;
+
+		for (int i = 0; i < cnt; i++)
+			list.add(Integer.valueOf(42 + i));
+		assertEquals(cnt, list.size());
+
+		for (int i = 0; i < cnt; i++)
+			assertEquals(Integer.valueOf(42 + i), list.get(i));
+
+		list.clear();
+		assertEquals(0, list.size());
+		assertTrue(list.isEmpty());
+
+		for (int i = 0; i < cnt; i++)
+			list.add(i, Integer.valueOf(42 + i));
+		assertEquals(cnt, list.size());
+
+		for (int i = 0; i < cnt; i++)
+			assertEquals(Integer.valueOf(42 + i), list.get(i));
+	}
+
+	@Test
+	public void testAddSlowPath() {
+		BlockList<String> list = new BlockList<String>(4);
+
+		String fooStr = "foo";
+		String barStr = "bar";
+		String foobarStr = "foobar";
+		String firstStr = "first";
+		String zeroStr = "zero";
+
+		list.add(fooStr);
+		list.add(barStr);
+		list.add(foobarStr);
+		assertEquals(3, list.size());
+
+		list.add(1, firstStr);
+		assertEquals(4, list.size());
+		assertSame(fooStr, list.get(0));
+		assertSame(firstStr, list.get(1));
+		assertSame(barStr, list.get(2));
+		assertSame(foobarStr, list.get(3));
+
+		list.add(0, zeroStr);
+		assertEquals(5, list.size());
+		assertSame(zeroStr, list.get(0));
+		assertSame(fooStr, list.get(1));
+		assertSame(firstStr, list.get(2));
+		assertSame(barStr, list.get(3));
+		assertSame(foobarStr, list.get(4));
+	}
+
+	@Test
+	public void testRemoveFromEnd() {
+		BlockList<String> list = new BlockList<String>(4);
+
+		String fooStr = "foo";
+		String barStr = "bar";
+		String foobarStr = "foobar";
+
+		list.add(fooStr);
+		list.add(barStr);
+		list.add(foobarStr);
+
+		assertSame(foobarStr, list.remove(2));
+		assertEquals(2, list.size());
+
+		assertSame(barStr, list.remove(1));
+		assertEquals(1, list.size());
+
+		assertSame(fooStr, list.remove(0));
+		assertEquals(0, list.size());
+	}
+
+	@Test
+	public void testRemoveSlowPath() {
+		BlockList<String> list = new BlockList<String>(4);
+
+		String fooStr = "foo";
+		String barStr = "bar";
+		String foobarStr = "foobar";
+
+		list.add(fooStr);
+		list.add(barStr);
+		list.add(foobarStr);
+
+		assertSame(barStr, list.remove(1));
+		assertEquals(2, list.size());
+		assertSame(fooStr, list.get(0));
+		assertSame(foobarStr, list.get(1));
+
+		assertSame(fooStr, list.remove(0));
+		assertEquals(1, list.size());
+		assertSame(foobarStr, list.get(0));
+
+		assertSame(foobarStr, list.remove(0));
+		assertEquals(0, list.size());
+	}
+
+	@Test
+	public void testAddRemoveAdd() {
+		BlockList<Integer> list = new BlockList<Integer>();
+		for (int i = 0; i < BlockList.BLOCK_SIZE + 1; i++)
+			list.add(Integer.valueOf(i));
+		assertEquals(Integer.valueOf(BlockList.BLOCK_SIZE),
+				list.remove(list.size() - 1));
+		assertEquals(Integer.valueOf(BlockList.BLOCK_SIZE - 1),
+				list.remove(list.size() - 1));
+		assertTrue(list.add(Integer.valueOf(1)));
+		assertEquals(Integer.valueOf(1), list.get(list.size() - 1));
+	}
+
+	@Test
+	public void testFastIterator() {
+		BlockList<Integer> list = new BlockList<Integer>(4);
+		int cnt = BlockList.BLOCK_SIZE * 3;
+
+		for (int i = 0; i < cnt; i++)
+			list.add(Integer.valueOf(42 + i));
+		assertEquals(cnt, list.size());
+
+		Iterator<Integer> itr = list.iterator();
+		for (int i = 0; i < cnt; i++) {
+			assertTrue(itr.hasNext());
+			assertEquals(Integer.valueOf(42 + i), itr.next());
+		}
+		assertFalse(itr.hasNext());
+	}
+
+	@Test
+	public void testAddRejectsBadIndexes() {
+		BlockList<Integer> list = new BlockList<Integer>(4);
+		list.add(Integer.valueOf(41));
+
+		try {
+			list.add(-1, Integer.valueOf(42));
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(-1), badIndex.getMessage());
+		}
+
+		try {
+			list.add(4, Integer.valueOf(42));
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(4), badIndex.getMessage());
+		}
+	}
+
+	@Test
+	public void testRemoveRejectsBadIndexes() {
+		BlockList<Integer> list = new BlockList<Integer>(4);
+		list.add(Integer.valueOf(41));
+
+		try {
+			list.remove(-1);
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(-1), badIndex.getMessage());
+		}
+
+		try {
+			list.remove(4);
+		} catch (IndexOutOfBoundsException badIndex) {
+			assertEquals(String.valueOf(4), badIndex.getMessage());
+		}
+	}
+}