public void PeekingDoesNotChangeState()
{
using (var temp = TempFolder.ForCaller())
using (var buffer = new LogBuffer(temp.AllocateFilename("mdb"), DefaultBufferSize))
{
buffer.Enqueue(new[] { Some.Bytes(140) });
var contents = buffer.Peek((int)DefaultBufferSize);
Assert.Equal(1, contents.Length);
var remainder = buffer.Peek((int)DefaultBufferSize);
Assert.Equal(1, remainder.Length);
}
}
public void AtLeastOneEventIsAlwaysDequeued()
{
using (var temp = TempFolder.ForCaller())
using (var buffer = new LogBuffer(temp.AllocateFilename("mdb"), DefaultBufferSize))
{
byte[] a1 = Some.Bytes(140), a2 = Some.Bytes(140), a3 = Some.Bytes(140);
buffer.Enqueue(new[] { a1, a2, a3 });
var contents = buffer.Peek(30);
Assert.Equal(1, contents.Length);
Assert.Equal(a1, contents[0].Value);
}
}
public void SizeHintLimitsDequeuedEventCount()
{
using (var temp = TempFolder.ForCaller())
using (var buffer = new LogBuffer(temp.AllocateFilename("mdb"), DefaultBufferSize))
{
byte[] a1 = Some.Bytes(140), a2 = Some.Bytes(140), a3 = Some.Bytes(140);
buffer.Enqueue(new[] { a1, a2, a3 });
var contents = buffer.Peek(300);
Assert.Equal(2, contents.Length);
Assert.Equal(a1, contents[0].Value);
Assert.Equal(a2, contents[1].Value);
}
}
public void EntriesOverLimitArePurgedFifo()
{
using (var temp = TempFolder.ForCaller())
using (var buffer = new LogBuffer(temp.AllocateFilename("mdb"), 4096))
{
byte[] a1 = Some.Bytes(140), a2 = Some.Bytes(140), a3 = Some.Bytes(140);
buffer.Enqueue(new[] { a1, a2, a3 });
var contents = buffer.Peek((int)DefaultBufferSize);
Assert.Equal(2, contents.Length);
Assert.Equal(a2, contents[0].Value);
Assert.Equal(a3, contents[1].Value);
}
}
public void GivingTheLastSeenEventKeyRemovesPrecedingEvents()
{
using (var temp = TempFolder.ForCaller())
using (var buffer = new LogBuffer(temp.AllocateFilename("mdb"), DefaultBufferSize))
{
byte[] a1 = Some.Bytes(140), a2 = Some.Bytes(140), a3 = Some.Bytes(140);
buffer.Enqueue(new[] { a1, a2, a3 });
var contents = buffer.Peek(420);
Assert.Equal(3, contents.Length);
buffer.Dequeue(contents[2].Key);
var remaining = buffer.Peek(420);
Assert.Equal(0, remaining.Length);
}
}
public void EnumerationIsInOrder()
{
using (var temp = TempFolder.ForCaller())
using (var buffer = new LogBuffer(temp.AllocateFilename("mdb"), DefaultBufferSize))
{
byte[] a1 = Some.Bytes(140), a2 = Some.Bytes(140), a3 = Some.Bytes(140);
buffer.Enqueue(new[] { a1, a2, a3 });
var contents = new List <byte[]>();
buffer.Enumerate((k, v) =>
{
contents.Add(v);
});
Assert.Equal(3, contents.Count);
Assert.Equal(new[] { a1, a2, a3 }, contents);
}
}
public void EntriesSurviveReloads()
{
var apiKey = Some.ApiKey();
var value = Some.Bytes(100);
using (var tmp = new TempFolder("Buffer"))
{
using (var map = CreateActiveLogBufferMap(tmp))
{
map.GetLogBuffer(null).Enqueue(new[] { value });
map.GetLogBuffer(apiKey).Enqueue(new[] { value });
}
using (var map = CreateActiveLogBufferMap(tmp))
{
var first = map.GetLogBuffer(null).Peek(0).Single();
var second = map.GetLogBuffer(apiKey).Peek(0).Single();
Assert.Equal(value, first.Value);
Assert.Equal(value, second.Value);
}
}
}