public void Deleting_last_record_truncates_file()
{
AppendRecord(1, false);
AppendRecord(2, true);
AppendRecord(3, false);
var queueStream = new SingleFileQueueStream(_stream);
var handle1 = queueStream.ReadNextRecord().Handle;
var handle2 = queueStream.ReadNextRecord().Handle;
queueStream.DeleteRecord(handle1);
queueStream.DeleteRecord(handle2);
Assert.AreEqual(0, _stream.Length);
}
public void Corrupt_record_is_ignored_at_initialization()
{
var v1 = "asdsdasdasdasdasd";
var v2 = "asdasdsadasdwwdsdw";
AppendRecord(v1, false);
for(byte i = 0; i < 6; i++) {
_stream.WriteByte(i);
}
AppendRecord(v2, false);
var queueStream = new SingleFileQueueStream(_stream);
Assert.AreEqual(2,queueStream.UnreadCount);
Assert.AreEqual(v1, GetStringValue(queueStream.ReadNextRecord().Stream));
Assert.AreEqual(v2, GetStringValue(queueStream.ReadNextRecord().Stream));
}
public void Corrupt_record_does_not_stop_further_appending_dequeueing()
{
var v1 = "asdsdasdasdasdasd";
var v2 = "asdasdsadasdwwdsdw";
AppendRecord(v1, false);
for(byte i = 0; i < 6; i++) {
_stream.WriteByte(i);
}
var position = _stream.Position;
var queueStream = new SingleFileQueueStream(_stream);
Assert.AreEqual(1, queueStream.UnreadCount);
using(var stream = new MemoryStream()) {
stream.Write(Encoding.UTF8.GetBytes(v2));
stream.Seek(0, SeekOrigin.Begin);
queueStream.AppendRecord(stream, stream.Length);
AssertRecord(v2, position, false);
Assert.AreEqual(2, queueStream.UnreadCount);
}
Assert.AreEqual(v1, GetStringValue(queueStream.ReadNextRecord().Stream));
Assert.AreEqual(v2, GetStringValue(queueStream.ReadNextRecord().Stream));
}
public void Can_read_consecutive_records()
{
AppendRecord(1, false);
AppendRecord(2, true);
AppendRecord(3, false);
var queueStream = new SingleFileQueueStream(_stream);
Assert.AreEqual(1, GetIntValue(queueStream.ReadNextRecord().Stream));
Assert.AreEqual(3, GetIntValue(queueStream.ReadNextRecord().Stream));
Assert.AreEqual(0, queueStream.UnreadCount);
}
public void Can_delete_record()
{
AppendRecord(1, false);
AppendRecord(2, false);
var queueStream = new SingleFileQueueStream(_stream);
var handle = queueStream.ReadNextRecord().Handle;
queueStream.DeleteRecord(handle);
AssertRecord(1, 0, true);
}
public void Can_append_record_to_truncated_file()
{
AppendRecord(1, false);
var queueStream = new SingleFileQueueStream(_stream);
var handle = queueStream.ReadNextRecord().Handle;
queueStream.DeleteRecord(handle);
using(var stream = new MemoryStream()) {
stream.Write(BitConverter.GetBytes(10));
stream.Seek(0, SeekOrigin.Begin);
queueStream.AppendRecord(stream, stream.Length);
AssertRecord(10, 0, false);
Assert.AreEqual(1, queueStream.UnreadCount);
}
}
