public virtual void TestAbbreviateIsActuallyUnique()
{
// This test is far more difficult. We have to manually craft
// an input that contains collisions at a particular prefix,
// but this is computationally difficult. Instead we force an
// index file to have what we want.
//
ObjectId id = Id("9d5b926ed164e8ee88d3b8b1e525d699adda01ba");
byte[] idBuf = ToByteArray(id);
IList <PackedObjectInfo> objects = new AList <PackedObjectInfo>();
for (int i = 0; i < 256; i++)
{
idBuf[9] = unchecked ((byte)i);
objects.AddItem(new PackedObjectInfo(ObjectId.FromRaw(idBuf)));
}
string packName = "pack-" + id.Name;
FilePath packDir = new FilePath(((ObjectDirectory)db.ObjectDatabase).GetDirectory
(), "pack");
FilePath idxFile = new FilePath(packDir, packName + ".idx");
FilePath packFile = new FilePath(packDir, packName + ".pack");
FileUtils.Mkdir(packDir, true);
OutputStream dst = new BufferedOutputStream(new FileOutputStream(idxFile));
try
{
PackIndexWriter writer = new PackIndexWriterV2(dst);
writer.Write(objects, new byte[Constants.OBJECT_ID_LENGTH]);
}
finally
{
dst.Close();
}
new FileOutputStream(packFile).Close();
NUnit.Framework.Assert.AreEqual(id.Abbreviate(20), reader.Abbreviate(id, 2));
AbbreviatedObjectId abbrev8 = id.Abbreviate(8);
ICollection <ObjectId> matches = reader.Resolve(abbrev8);
NUnit.Framework.Assert.IsNotNull(matches);
NUnit.Framework.Assert.AreEqual(objects.Count, matches.Count);
foreach (PackedObjectInfo info in objects)
{
NUnit.Framework.Assert.IsTrue(matches.Contains(info), "contains " + info.Name);
}
try
{
db.Resolve(abbrev8.Name);
NUnit.Framework.Assert.Fail("did not throw AmbiguousObjectException");
}
catch (AmbiguousObjectException err)
{
NUnit.Framework.Assert.AreEqual(abbrev8, err.GetAbbreviatedObjectId());
matches = err.GetCandidates();
NUnit.Framework.Assert.IsNotNull(matches);
NUnit.Framework.Assert.AreEqual(objects.Count, matches.Count);
foreach (PackedObjectInfo info_1 in objects)
{
NUnit.Framework.Assert.IsTrue(matches.Contains(info_1), "contains " + info_1.Name
);
}
}
NUnit.Framework.Assert.AreEqual(id, db.Resolve(id.Abbreviate(20).Name));
}
public virtual void TestAbbreviateIsActuallyUnique()
{
// This test is far more difficult. We have to manually craft
// an input that contains collisions at a particular prefix,
// but this is computationally difficult. Instead we force an
// index file to have what we want.
//
ObjectId id = Id("9d5b926ed164e8ee88d3b8b1e525d699adda01ba");
byte[] idBuf = ToByteArray(id);
IList<PackedObjectInfo> objects = new AList<PackedObjectInfo>();
for (int i = 0; i < 256; i++)
{
idBuf[9] = unchecked((byte)i);
objects.AddItem(new PackedObjectInfo(ObjectId.FromRaw(idBuf)));
}
string packName = "pack-" + id.Name;
FilePath packDir = new FilePath(((ObjectDirectory)db.ObjectDatabase).GetDirectory
(), "pack");
FilePath idxFile = new FilePath(packDir, packName + ".idx");
FilePath packFile = new FilePath(packDir, packName + ".pack");
FileUtils.Mkdir(packDir, true);
OutputStream dst = new BufferedOutputStream(new FileOutputStream(idxFile));
try
{
PackIndexWriter writer = new PackIndexWriterV2(dst);
writer.Write(objects, new byte[Constants.OBJECT_ID_LENGTH]);
}
finally
{
dst.Close();
}
new FileOutputStream(packFile).Close();
NUnit.Framework.Assert.AreEqual(id.Abbreviate(20), reader.Abbreviate(id, 2));
AbbreviatedObjectId abbrev8 = id.Abbreviate(8);
ICollection<ObjectId> matches = reader.Resolve(abbrev8);
NUnit.Framework.Assert.IsNotNull(matches);
NUnit.Framework.Assert.AreEqual(objects.Count, matches.Count);
foreach (PackedObjectInfo info in objects)
{
NUnit.Framework.Assert.IsTrue(matches.Contains(info), "contains " + info.Name);
}
try
{
db.Resolve(abbrev8.Name);
NUnit.Framework.Assert.Fail("did not throw AmbiguousObjectException");
}
catch (AmbiguousObjectException err)
{
NUnit.Framework.Assert.AreEqual(abbrev8, err.GetAbbreviatedObjectId());
matches = err.GetCandidates();
NUnit.Framework.Assert.IsNotNull(matches);
NUnit.Framework.Assert.AreEqual(objects.Count, matches.Count);
foreach (PackedObjectInfo info_1 in objects)
{
NUnit.Framework.Assert.IsTrue(matches.Contains(info_1), "contains " + info_1.Name
);
}
}
NUnit.Framework.Assert.AreEqual(id, db.Resolve(id.Abbreviate(20).Name));
}
