--- /dev/null	2014-10-27 17:06:24.674114977 -0700
+++ new/test/java/util/zip/ChecksumBase.java	2014-11-06 06:57:07.160856790 -0800
@@ -0,0 +1,196 @@
+/*
+ * Copyright (c) 2014, 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.
+ */
+
+/**
+ * Base class for Checksum tests
+ */
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+import java.util.zip.Checksum;
+
+public class ChecksumBase {
+
+    private final static byte[] BYTES_123456789 = "123456789".getBytes(StandardCharsets.US_ASCII);
+
+    public static void testAll(Checksum checksum, long expected) {
+        testBytes(checksum, expected);
+        testByteArray(checksum, expected);
+        testWrappedByteBuffer(checksum, expected);
+        testReadonlyByteBuffer(checksum, expected);
+        testDirectByteBuffer(checksum, expected);
+        testByteArrayOffset(checksum, expected);
+        testDirectByteBufferOffset(checksum, expected);
+        testLittleEndianDirectByteBufferOffset(checksum, expected);
+        testWrappedByteBufferOffset(checksum, expected);
+        testLittleEndianWrappedByteBufferOffset(checksum, expected);
+        testReadonlyByteBufferOffset(checksum, expected);
+        testLittleEndianReadonlyByteBufferOffset(checksum, expected);
+    }
+
+    private static void testBytes(Checksum checksum, long expected) {
+        checksum.reset();
+        for (byte bits : BYTES_123456789) {
+            checksum.update(bits);
+        }
+        checkChecksum(checksum, expected);
+    }
+
+    private static void testByteArray(Checksum checksum, long expected) {
+        checksum.reset();
+        checksum.update(BYTES_123456789);
+        checkChecksum(checksum, expected);
+    }
+
+    private static void testWrappedByteBuffer(Checksum checksum, long expected) {
+        checksum.reset();
+        ByteBuffer bb = ByteBuffer.wrap(BYTES_123456789);
+        checksum.update(bb);
+        checkChecksum(checksum, expected);
+    }
+
+    private static void testReadonlyByteBuffer(Checksum checksum, long expected) {
+        checksum.reset();
+        ByteBuffer bb = ByteBuffer.wrap(BYTES_123456789).asReadOnlyBuffer();
+        checksum.update(bb);
+        checkChecksum(checksum, expected);
+    }
+
+    private static void testDirectByteBuffer(Checksum checksum, long expected) {
+        checksum.reset();
+        ByteBuffer bb = ByteBuffer.allocateDirect(BYTES_123456789.length);
+        bb.put(BYTES_123456789);
+        bb.rewind();
+        checksum.update(bb);
+        checkChecksum(checksum, expected);
+    }
+
+    private static void checkChecksum(Checksum checksum, long expected) {
+        if (checksum.getValue() != expected) {
+            throw new RuntimeException("Calculated checksum result was invalid."
+                    + " Expected " + Long.toHexString(expected)
+                    + ", but got " + Long.toHexString(checksum.getValue()) + ".");
+        }
+    }
+
+    private static void testByteArrayOffset(Checksum checksum, long expected) {
+        byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
+        for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
+            checksum.reset();
+            System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
+            checksum.update(unaligned_bytes_123456789, i, BYTES_123456789.length);
+            checkChecksumOffset(checksum, expected, i);
+        }
+    }
+
+    private static void testDirectByteBufferOffset(Checksum checksum, long expected) {
+        byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
+        for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
+            checksum.reset();
+            ByteBuffer bb = ByteBuffer.allocateDirect(unaligned_bytes_123456789.length);
+            System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
+            bb.put(unaligned_bytes_123456789);
+            bb.position(i);
+            bb.limit(i + BYTES_123456789.length);
+            checksum.update(bb);
+            checkChecksumOffset(checksum, expected, i);
+        }
+    }
+
+    private static void testLittleEndianDirectByteBufferOffset(Checksum checksum, long expected) {
+        byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
+        for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
+            checksum.reset();
+            ByteBuffer bb = ByteBuffer.allocateDirect(unaligned_bytes_123456789.length);
+            bb.order(ByteOrder.LITTLE_ENDIAN);
+            System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
+            bb.put(unaligned_bytes_123456789);
+            bb.position(i);
+            bb.limit(i + BYTES_123456789.length);
+            checksum.update(bb);
+            checkChecksumOffset(checksum, expected, i);
+        }
+    }
+
+    private static void testWrappedByteBufferOffset(Checksum checksum, long expected) {
+        byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
+        for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
+            checksum.reset();
+            System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
+            ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789);
+            bb.position(i);
+            bb.limit(i + BYTES_123456789.length);
+            checksum.update(bb);
+            checkChecksumOffset(checksum, expected, i);
+        }
+    }
+
+    private static void testLittleEndianWrappedByteBufferOffset(Checksum checksum, long expected) {
+        byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
+        for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
+            checksum.reset();
+            System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
+            ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789);
+            bb.order(ByteOrder.LITTLE_ENDIAN);
+            bb.position(i);
+            bb.limit(i + BYTES_123456789.length);
+            checksum.update(bb);
+            checkChecksumOffset(checksum, expected, i);
+        }
+    }
+
+    private static void testReadonlyByteBufferOffset(Checksum checksum, long expected) {
+        byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
+        for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
+            checksum.reset();
+            System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
+            ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789).asReadOnlyBuffer();
+            bb.position(i);
+            bb.limit(i + BYTES_123456789.length);
+            checksum.update(bb);
+            checkChecksumOffset(checksum, expected, i);
+        }
+    }
+
+    private static void testLittleEndianReadonlyByteBufferOffset(Checksum checksum, long expected) {
+        byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
+        for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
+            checksum.reset();
+            System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
+            ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789).asReadOnlyBuffer();
+            bb.order(ByteOrder.LITTLE_ENDIAN);
+            bb.position(i);
+            bb.limit(i + BYTES_123456789.length);
+            checksum.update(bb);
+            checkChecksumOffset(checksum, expected, i);
+        }
+    }
+
+    private static void checkChecksumOffset(Checksum checksum, long expected, int offset) {
+        if (checksum.getValue() != expected) {
+            throw new RuntimeException("Calculated CRC32C result was invalid. Array offset "
+                    + offset + ". Expected: " + Long.toHexString(expected) + ", Got: "
+                    + Long.toHexString(checksum.getValue()));
+        }
+    }
+}