public void WriteShould_ReturnTaskWhenSpaceAvailable()
{
var payloads = new EventPayloads {
new ArraySegment <byte>(new byte[] { 0, 1, 2, 3, 4 })
};
var task = _log.Write(payloads);
task.ShouldNotBe(null);
}
public void WriteShould_ReturnNull()
{
var payloads = new EventPayloads()
{
new ArraySegment <byte>(new byte[] { 0, 1, 2, 3, 4 })
};
var task = _log.Write(payloads);
task.ShouldBeNull();
}
public void WriteShould_ReturnNullWhenSpaceUnavailable()
{
using (var accessor = _file.CreateViewAccessor(0, 4, MemoryMappedFileAccess.CopyOnWrite)) {
var log = new EventLogPage(0, false, accessor);
var payloads = new EventPayloads {
new ArraySegment <byte>(new byte[] { 0, 1, 2, 3, 4 })
};
var task = log.Write(payloads);
task.ShouldBe(null);
}
}
public void FlushShould_CompletePreviousWriteTasks()
{
var payloads = new EventPayloads()
{
new ArraySegment <byte>(new byte[] { 0, 1, 2, 3, 4 })
};
var task = _log.Write(payloads);
task.IsCompleted.ShouldBeFalse();
_log.Flush();
task.IsCompleted.ShouldBeTrue();
}
public async Task WriteShould_ReturnSequentialIds()
{
var payloads = new EventPayloads {
new ArraySegment <byte>(new byte[] { 0, 1 }),
new ArraySegment <byte>(new byte[] { 0, 1 }),
new ArraySegment <byte>(new byte[] { 0, 1 }),
new ArraySegment <byte>(new byte[] { 0, 1 })
};
var task = _log.Write(payloads);
_log.Flush();
var result = await task;
var ids = result.Select(e => e.Id).ToList();
ids.ShouldBe(Enumerable.Range((int)ids.Min(), payloads.Count).Select(id => (ulong)id));
}
public async Task WriteShould_ReturnContiguousIdsAcrossCalls()
{
var payloads = new EventPayloads {
new ArraySegment <byte>(new byte[] { 0, 1 }),
new ArraySegment <byte>(new byte[] { 0, 1 }),
new ArraySegment <byte>(new byte[] { 0, 1 }),
new ArraySegment <byte>(new byte[] { 0, 1 })
};
var a = _log.Write(payloads);
var b = _log.Write(payloads);
var c = _log.Write(payloads);
_log.Flush();
var result = (await a).Concat(await b).Concat(await c);
var ids = result.Select(e => e.Id).OrderBy(id => id).ToList();
ids.ShouldBe(Enumerable.Range((int)ids.Min(), payloads.Count * 3).Select(id => (ulong)id));
}
public async Task WriteShould_ReturnOrderedIdsAcrossFlushBoundries()
{
var payloads = new EventPayloads {
new ArraySegment <byte>(new byte[] { 0, 1 }),
new ArraySegment <byte>(new byte[] { 0, 1 }),
new ArraySegment <byte>(new byte[] { 0, 1 }),
new ArraySegment <byte>(new byte[] { 0, 1 })
};
var a = _log.Write(payloads);
var b = _log.Write(payloads);
_log.Flush();
var c = _log.Write(payloads);
_log.Flush();
var firstMax = (await a).Concat(await b).Select(e => e.Id).Max();
var secondMin = (await c).Select(e => e.Id).Min();
firstMax.ShouldBeLessThan(secondMin);
}
protected override void OnEventWritten(EventWrittenEventArgs eventData) => EventPayloads.Add(eventData);
