We really need to ensure these methods work correctly, and since
we just suffered from a bug in NB.decodeUInt16 we now have a set
of test cases for the corner conditions of each encode and decode
method pair we support.
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
.../tst/org/spearce/jgit/util/NBTest.java | 328 ++++++++++++++++++++
1 files changed, 328 insertions(+), 0 deletions(-)
create mode 100644 org.spearce.jgit.test/tst/org/spearce/jgit/util/NBTest.java
diff --git a/org.spearce.jgit.test/tst/org/spearce/jgit/util/NBTest.java b/org.spearce.jgit.test/tst/org/spearce/jgit/util/NBTest.java
new file mode 100644
index 0000000..217db7f
--- /dev/null
+++ b/org.spearce.jgit.test/tst/org/spearce/jgit/util/NBTest.java
@@ -0,0 +1,328 @@
+/*
+ * Copyright (C) 2008, Google Inc.
+ *
+ * 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 Git Development Community 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.spearce.jgit.util;
+
+import junit.framework.TestCase;
+
+public class NBTest extends TestCase {
+ public void testCompareUInt32() {
+ assertTrue(NB.compareUInt32(0, 0) == 0);
+ assertTrue(NB.compareUInt32(1, 0) > 0);
+ assertTrue(NB.compareUInt32(0, 1) < 0);
+ assertTrue(NB.compareUInt32(-1, 0) > 0);
+ assertTrue(NB.compareUInt32(0, -1) < 0);
+ assertTrue(NB.compareUInt32(-1, 1) > 0);
+ assertTrue(NB.compareUInt32(1, -1) < 0);
+ }
+
+ public void testDecodeUInt16() {
+ assertEquals(0, NB.decodeUInt16(b(0, 0), 0));
+ assertEquals(0, NB.decodeUInt16(padb(3, 0, 0), 3));
+
+ assertEquals(3, NB.decodeUInt16(b(0, 3), 0));
+ assertEquals(3, NB.decodeUInt16(padb(3, 0, 3), 3));
+
+ assertEquals(0xde03, NB.decodeUInt16(b(0xde, 3), 0));
+ assertEquals(0xde03, NB.decodeUInt16(padb(3, 0xde, 3), 3));
+
+ assertEquals(0x03de, NB.decodeUInt16(b(3, 0xde), 0));
+ assertEquals(0x03de, NB.decodeUInt16(padb(3, 3, 0xde), 3));
+
+ assertEquals(0xffff, NB.decodeUInt16(b(0xff, 0xff), 0));
+ assertEquals(0xffff, NB.decodeUInt16(padb(3, 0xff, 0xff), 3));
+ }
+
+ public void testDecodeInt32() {
+ assertEquals(0, NB.decodeInt32(b(0, 0, 0, 0), 0));
+ assertEquals(0, NB.decodeInt32(padb(3, 0, 0, 0, 0), 3));
+
+ assertEquals(3, NB.decodeInt32(b(0, 0, 0, 3), 0));
+ assertEquals(3, NB.decodeInt32(padb(3, 0, 0, 0, 3), 3));
+
+ assertEquals(0xdeadbeef, NB.decodeInt32(b(0xde, 0xad, 0xbe, 0xef), 0));
+ assertEquals(0xdeadbeef, NB.decodeInt32(
+ padb(3, 0xde, 0xad, 0xbe, 0xef), 3));
+
+ assertEquals(0x0310adef, NB.decodeInt32(b(0x03, 0x10, 0xad, 0xef), 0));
+ assertEquals(0x0310adef, NB.decodeInt32(
+ padb(3, 0x03, 0x10, 0xad, 0xef), 3));
+
+ assertEquals(0xffffffff, NB.decodeInt32(b(0xff, 0xff, 0xff, 0xff), 0));
+ assertEquals(0xffffffff, NB.decodeInt32(
+ padb(3, 0xff, 0xff, 0xff, 0xff), 3));
+ }
+
+ public void testDecodeUInt32() {
+ assertEquals(0L, NB.decodeUInt32(b(0, 0, 0, 0), 0));
+ assertEquals(0L, NB.decodeUInt32(padb(3, 0, 0, 0, 0), 3));
+
+ assertEquals(3L, NB.decodeUInt32(b(0, 0, 0, 3), 0));
+ assertEquals(3L, NB.decodeUInt32(padb(3, 0, 0, 0, 3), 3));
+
+ assertEquals(0xdeadbeefL, NB.decodeUInt32(b(0xde, 0xad, 0xbe, 0xef), 0));
+ assertEquals(0xdeadbeefL, NB.decodeUInt32(padb(3, 0xde, 0xad, 0xbe,
+ 0xef), 3));
+
+ assertEquals(0x0310adefL, NB.decodeUInt32(b(0x03, 0x10, 0xad, 0xef), 0));
+ assertEquals(0x0310adefL, NB.decodeUInt32(padb(3, 0x03, 0x10, 0xad,
+ 0xef), 3));
+
+ assertEquals(0xffffffffL, NB.decodeUInt32(b(0xff, 0xff, 0xff, 0xff), 0));
+ assertEquals(0xffffffffL, NB.decodeUInt32(padb(3, 0xff, 0xff, 0xff,
+ 0xff), 3));
+ }
+
+ public void testDecodeUInt64() {
+ assertEquals(0L, NB.decodeUInt64(b(0, 0, 0, 0, 0, 0, 0, 0), 0));
+ assertEquals(0L, NB.decodeUInt64(padb(3, 0, 0, 0, 0, 0, 0, 0, 0), 3));
+
+ assertEquals(3L, NB.decodeUInt64(b(0, 0, 0, 0, 0, 0, 0, 3), 0));
+ assertEquals(3L, NB.decodeUInt64(padb(3, 0, 0, 0, 0, 0, 0, 0, 3), 3));
+
+ assertEquals(0xdeadbeefL, NB.decodeUInt64(b(0, 0, 0, 0, 0xde, 0xad,
+ 0xbe, 0xef), 0));
+ assertEquals(0xdeadbeefL, NB.decodeUInt64(padb(3, 0, 0, 0, 0, 0xde,
+ 0xad, 0xbe, 0xef), 3));
+
+ assertEquals(0x0310adefL, NB.decodeUInt64(b(0, 0, 0, 0, 0x03, 0x10,
+ 0xad, 0xef), 0));
+ assertEquals(0x0310adefL, NB.decodeUInt64(padb(3, 0, 0, 0, 0, 0x03,
+ 0x10, 0xad, 0xef), 3));
+
+ assertEquals(0xc0ffee78deadbeefL, NB.decodeUInt64(b(0xc0, 0xff, 0xee,
+ 0x78, 0xde, 0xad, 0xbe, 0xef), 0));
+ assertEquals(0xc0ffee78deadbeefL, NB.decodeUInt64(padb(3, 0xc0, 0xff,
+ 0xee, 0x78, 0xde, 0xad, 0xbe, 0xef), 3));
+
+ assertEquals(0x00000000ffffffffL, NB.decodeUInt64(b(0, 0, 0, 0, 0xff,
+ 0xff, 0xff, 0xff), 0));
+ assertEquals(0x00000000ffffffffL, NB.decodeUInt64(padb(3, 0, 0, 0, 0,
+ 0xff, 0xff, 0xff, 0xff), 3));
+ assertEquals(0xffffffffffffffffL, NB.decodeUInt64(b(0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff), 0));
+ assertEquals(0xffffffffffffffffL, NB.decodeUInt64(padb(3, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff), 3));
+ }
+
+ public void testEncodeInt16() {
+ final byte[] out = new byte[16];
+
+ prepareOutput(out);
+ NB.encodeInt16(out, 0, 0);
+ assertOutput(b(0, 0), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt16(out, 3, 0);
+ assertOutput(b(0, 0), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt16(out, 0, 3);
+ assertOutput(b(0, 3), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt16(out, 3, 3);
+ assertOutput(b(0, 3), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt16(out, 0, 0xdeac);
+ assertOutput(b(0xde, 0xac), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt16(out, 3, 0xdeac);
+ assertOutput(b(0xde, 0xac), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt16(out, 3, -1);
+ assertOutput(b(0xff, 0xff), out, 3);
+ }
+
+ public void testEncodeInt32() {
+ final byte[] out = new byte[16];
+
+ prepareOutput(out);
+ NB.encodeInt32(out, 0, 0);
+ assertOutput(b(0, 0, 0, 0), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt32(out, 3, 0);
+ assertOutput(b(0, 0, 0, 0), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt32(out, 0, 3);
+ assertOutput(b(0, 0, 0, 3), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt32(out, 3, 3);
+ assertOutput(b(0, 0, 0, 3), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt32(out, 0, 0xdeac);
+ assertOutput(b(0, 0, 0xde, 0xac), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt32(out, 3, 0xdeac);
+ assertOutput(b(0, 0, 0xde, 0xac), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt32(out, 0, 0xdeac9853);
+ assertOutput(b(0xde, 0xac, 0x98, 0x53), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt32(out, 3, 0xdeac9853);
+ assertOutput(b(0xde, 0xac, 0x98, 0x53), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt32(out, 3, -1);
+ assertOutput(b(0xff, 0xff, 0xff, 0xff), out, 3);
+ }
+
+ public void testEncodeInt64() {
+ final byte[] out = new byte[16];
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 0, 0L);
+ assertOutput(b(0, 0, 0, 0, 0, 0, 0, 0), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 3, 0L);
+ assertOutput(b(0, 0, 0, 0, 0, 0, 0, 0), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 0, 3L);
+ assertOutput(b(0, 0, 0, 0, 0, 0, 0, 3), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 3, 3L);
+ assertOutput(b(0, 0, 0, 0, 0, 0, 0, 3), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 0, 0xdeacL);
+ assertOutput(b(0, 0, 0, 0, 0, 0, 0xde, 0xac), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 3, 0xdeacL);
+ assertOutput(b(0, 0, 0, 0, 0, 0, 0xde, 0xac), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 0, 0xdeac9853L);
+ assertOutput(b(0, 0, 0, 0, 0xde, 0xac, 0x98, 0x53), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 3, 0xdeac9853L);
+ assertOutput(b(0, 0, 0, 0, 0xde, 0xac, 0x98, 0x53), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 0, 0xac431242deac9853L);
+ assertOutput(b(0xac, 0x43, 0x12, 0x42, 0xde, 0xac, 0x98, 0x53), out, 0);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 3, 0xac431242deac9853L);
+ assertOutput(b(0xac, 0x43, 0x12, 0x42, 0xde, 0xac, 0x98, 0x53), out, 3);
+
+ prepareOutput(out);
+ NB.encodeInt64(out, 3, -1L);
+ assertOutput(b(0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff), out, 3);
+ }
+
+ private static void prepareOutput(final byte[] buf) {
+ for (int i = 0; i < buf.length; i++)
+ buf[i] = (byte) (0x77 + i);
+ }
+
+ private static void assertOutput(final byte[] expect, final byte[] buf,
+ final int offset) {
+ for (int i = 0; i < offset; i++)
+ assertEquals((byte) (0x77 + i), buf[i]);
+ for (int i = 0; i < expect.length; i++)
+ assertEquals(expect[i], buf[offset + i]);
+ for (int i = offset + expect.length; i < buf.length; i++)
+ assertEquals((byte) (0x77 + i), buf[i]);
+ }
+
+ private static byte[] b(final int a, final int b) {
+ return new byte[] { (byte) a, (byte) b };
+ }
+
+ private static byte[] padb(final int len, final int a, final int b) {
+ final byte[] r = new byte[len + 2];
+ for (int i = 0; i < len; i++)
+ r[i] = (byte) 0xaf;
+ r[len] = (byte) a;
+ r[len + 1] = (byte) b;
+ return r;
+ }
+
+ private static byte[] b(final int a, final int b, final int c, final int d) {
+ return new byte[] { (byte) a, (byte) b, (byte) c, (byte) d };
+ }
+
+ private static byte[] padb(final int len, final int a, final int b,
+ final int c, final int d) {
+ final byte[] r = new byte[len + 4];
+ for (int i = 0; i < len; i++)
+ r[i] = (byte) 0xaf;
+ r[len] = (byte) a;
+ r[len + 1] = (byte) b;
+ r[len + 2] = (byte) c;
+ r[len + 3] = (byte) d;
+ return r;
+ }
+
+ private static byte[] b(final int a, final int b, final int c, final int d,
+ final int e, final int f, final int g, final int h) {
+ return new byte[] { (byte) a, (byte) b, (byte) c, (byte) d, (byte) e,
+ (byte) f, (byte) g, (byte) h };
+ }
+
+ private static byte[] padb(final int len, final int a, final int b,
+ final int c, final int d, final int e, final int f, final int g,
+ final int h) {
+ final byte[] r = new byte[len + 8];
+ for (int i = 0; i < len; i++)
+ r[i] = (byte) 0xaf;
+ r[len] = (byte) a;
+ r[len + 1] = (byte) b;
+ r[len + 2] = (byte) c;
+ r[len + 3] = (byte) d;
+ r[len + 4] = (byte) e;
+ r[len + 5] = (byte) f;
+ r[len + 6] = (byte) g;
+ r[len + 7] = (byte) h;
+ return r;
+ }
+}
--
1.6.0.87.g2858d
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