public void Item_depletion_of_non_head_resets_file_numbering_if_all_other_files_are_empty_already()
{
using (var queueStream = new MultiFileQueueStream(_path, 14)) {
var s1 = GetStream(1);
var s2 = GetStream(2);
var s3 = GetStream(3);
var s4 = GetStream(4);
var s5 = GetStream(5);
queueStream.AppendRecord(s1, s1.Length);
queueStream.AppendRecord(s2, s2.Length);
queueStream.AppendRecord(s3, s3.Length);
queueStream.AppendRecord(s4, s4.Length);
queueStream.AppendRecord(s5, s5.Length);
Assert.AreEqual(3, Directory.GetFiles(_path).Length);
var h1 = queueStream.ReadNextRecord();
var h2 = queueStream.ReadNextRecord();
var h3 = queueStream.ReadNextRecord();
var h4 = queueStream.ReadNextRecord();
var h5 = queueStream.ReadNextRecord();
Assert.IsNotNull(h5);
queueStream.DeleteRecord(h1.Handle);
queueStream.DeleteRecord(h2.Handle);
queueStream.DeleteRecord(h3.Handle);
queueStream.DeleteRecord(h5.Handle);
var files = Directory.GetFiles(_path);
Assert.AreEqual(2, files.Length);
Assert.AreEqual("data_2.bin", Path.GetFileName(files[0]));
Assert.AreEqual("data_3.bin", Path.GetFileName(files[1]));
queueStream.DeleteRecord(h4.Handle);
files = Directory.GetFiles(_path);
Assert.AreEqual(1, files.Length);
Assert.AreEqual("data_1.bin", Path.GetFileName(files[0]));
}
}
public void Item_depletion_removes_read_files()
{
using (var queueStream = new MultiFileQueueStream(_path, 4)) {
var s1 = GetStream(1);
var s2 = GetStream(2);
var s3 = GetStream(3);
var s4 = GetStream(4);
queueStream.AppendRecord(s1, s1.Length);
queueStream.AppendRecord(s2, s2.Length);
queueStream.AppendRecord(s3, s3.Length);
queueStream.AppendRecord(s4, s4.Length);
var h1 = queueStream.ReadNextRecord();
var h2 = queueStream.ReadNextRecord();
var h3 = queueStream.ReadNextRecord();
var h4 = queueStream.ReadNextRecord();
Assert.IsNotNull(h4);
Assert.AreEqual(5, Directory.GetFiles(_path).Length);
queueStream.DeleteRecord(h2.Handle);
Assert.AreEqual(4, Directory.GetFiles(_path).Length);
queueStream.DeleteRecord(h3.Handle);
Assert.AreEqual(3, Directory.GetFiles(_path).Length);
queueStream.DeleteRecord(h1.Handle);
Assert.AreEqual(2, Directory.GetFiles(_path).Length);
queueStream.DeleteRecord(h4.Handle);
Assert.AreEqual(1, Directory.GetFiles(_path).Length);
}
}
public void Deleting_last_record_truncates_file()
{
AppendRecord(1, false);
AppendRecord(2, true);
AppendRecord(3, false);
using (var queueStream = new MultiFileQueueStream(_path)) {
var handle1 = queueStream.ReadNextRecord().Handle;
var handle2 = queueStream.ReadNextRecord().Handle;
queueStream.DeleteRecord(handle1);
queueStream.DeleteRecord(handle2);
}
Assert.AreEqual(0, File.Open(_firstFile, FileMode.Open).Length);
}
public void Can_delete_record()
{
AppendRecord(1, false);
AppendRecord(2, false);
using (var queueStream = new MultiFileQueueStream(_path)) {
var handle = queueStream.ReadNextRecord().Handle;
queueStream.DeleteRecord(handle);
}
AssertRecord(1, 0, true);
}
public void Can_append_record_to_truncated_file()
{
AppendRecord(1, false);
using (var queueStream = new MultiFileQueueStream(_path)) {
var handle = queueStream.ReadNextRecord().Handle;
queueStream.DeleteRecord(handle);
var s1 = GetStream(10);
queueStream.AppendRecord(s1, s1.Length);
Assert.AreEqual(1, queueStream.UnreadCount);
}
AssertRecord(10, 0, false);
}
public void Item_depletion_of_head_does_nothing_to_file_count()
{
using (var queueStream = new MultiFileQueueStream(_path, 14)) {
var s1 = GetStream(1);
var s2 = GetStream(2);
var s3 = GetStream(3);
var s4 = GetStream(4);
var s5 = GetStream(5);
queueStream.AppendRecord(s1, s1.Length);
queueStream.AppendRecord(s2, s2.Length);
queueStream.AppendRecord(s3, s3.Length);
queueStream.AppendRecord(s4, s4.Length);
queueStream.AppendRecord(s5, s5.Length);
Assert.AreEqual(3, Directory.GetFiles(_path).Length);
var h1 = queueStream.ReadNextRecord();
var h2 = queueStream.ReadNextRecord();
var h3 = queueStream.ReadNextRecord();
var h4 = queueStream.ReadNextRecord();
var h5 = queueStream.ReadNextRecord();
Assert.IsNotNull(h5);
queueStream.DeleteRecord(h5.Handle);
Assert.AreEqual(3, Directory.GetFiles(_path).Length);
}
}
