public void FlightRecorder_Persist_Multiple()
{
// Verify that a second flight recorder trying to use the same
// backing file will fail-over to using a memory stream.
string path = Path.GetTempFileName();
try
{
using (var recorder1 = new FlightRecorder(path))
{
Assert.IsTrue(recorder1.IsPersistMode);
Assert.IsFalse(recorder1.IsPassThruMode);
using (var recorder2 = new FlightRecorder(path))
{
// Perform some operations to the second recorder. These
// operations will be NOPs since the recorder is blocked,
// but should not fail or impact the first recorder's
// backing file.
recorder2.Log("Test");
recorder2.Dequeue();
recorder2.Dequeue(2);
recorder2.GetEvents();
// Record some events to the first recorder.
recorder1.Log("event #1");
recorder1.Log("event #2");
}
}
// Verify that the first instance did record properly.
using (var recorder = new FlightRecorder(path))
{
Assert.AreEqual(2, recorder.Count);
Assert.AreEqual("event #1", recorder.Dequeue().Operation);
Assert.AreEqual(1, recorder.Count);
Assert.AreEqual("event #2", recorder.Dequeue().Operation);
Assert.AreEqual(0, recorder.Count);
Assert.IsNull(recorder.Dequeue());
}
}
finally
{
Helper.DeleteFile(path);
}
}
public void FlightRecorder_PassThru_GetEvents()
{
// Verify that GetEvents() always returns an empty list.
Queue <FlightEvent> queue = new Queue <FlightEvent>();
using (var recorder = new FlightRecorder(evt => queue.Enqueue(evt)))
{
for (int i = 0; i < 20; i++)
{
recorder.Log(i.ToString());
}
Assert.AreEqual(0, recorder.GetEvents().Count);
}
}
public void FlightRecorder_Persist_GetEvents()
{
// Verify that GetEvents() works
MemoryStream stream = new MemoryStream();
List <FlightEvent> events;
using (var recorder = new FlightRecorder(stream))
{
for (int i = 0; i < 20; i++)
{
recorder.Log(i.ToString());
}
events = new List <FlightEvent>();
recorder.GetEvents().CopyTo(events);
}
for (int i = 0; i < 20; i++)
{
Assert.AreEqual(i.ToString(), events[i].Operation);
}
}
