public void ReadFromEventLogTest()
{
string actualLogMessage = "";
bool called = false;
EventLogSubscription.OnEntryWritten callback = (e) =>
{
called = true;
actualLogMessage = e.Message;
};
EventLogSubscription tailer = new EventLogSubscription(logName, callback, null, null);
tailer.Start();
string expectedLogMessage = Guid.NewGuid().ToString();
testLog.WriteEntry(expectedLogMessage);
int count = 0;
while (!called && count++ < 10)
{
Thread.Sleep(250);
}
Assert.True(count < 10);
Assert.True(called);
Assert.Equal(expectedLogMessage, actualLogMessage);
}
public void HandlesCallbackExceptionTest()
{
bool called = false;
EventLogSubscription.OnEntryWritten callback = (e) =>
{
called = true;
throw new Exception("My Exception");
};
StringWriter stdout = new StringWriter();
StringWriter stderr = new StringWriter();
EventLogSubscription tailer = new EventLogSubscription(logName, callback, stdout, stderr);
tailer.Start();
testLog.WriteEntry(Guid.NewGuid().ToString());
int count = 0;
while (!called && count++ < 10)
{
Thread.Sleep(250);
}
Assert.True(count < 10);
Assert.Contains("My Exception", stderr.ToString());
}
public void OnlyReadsNewEventsTest()
{
const string lastMessage = "last message";
bool called = false;
List <string> msgs = new List <string>();
EventLogSubscription.OnEntryWritten callback = (e) =>
{
msgs.Add(e.Message);
if (e.Message == lastMessage)
{
called = true;
}
};
using (EventLogSubscription tailer = new EventLogSubscription(logName, callback, null, null))
{
string oldLogMessage = Guid.NewGuid().ToString();
for (int i = 0; i < 5; i++)
{
testLog.WriteEntry(oldLogMessage);
}
Tailer tailer = new Tailer(logName, callback, null, null);
tailer.Start();
testLog.WriteEntry(lastMessage);
int count = 0;
while (!called && count++ < 40)
{
Thread.Sleep(250);
}
Assert.True(count < 10);
Assert.Equal(1, msgs.Count);
}
}
