public void ApplicationLogsReaderMergesResultsFromMultipleLogFiles()
{
var fs = new ApplicationLogsTestFileSystem();
FileSystemHelpers.Instance = fs;
fs.AddLogFile("log-1.txt",
@"2013-12-06T00:29:20 PID[20108] Information this is a log
2013-12-06T00:29:21 PID[20108] Warning this is a warning
2013-12-06T00:29:22 PID[20108] Error this is an error"
);
fs.AddLogFile("log-2.txt",
@"2013-12-06T00:29:20 PID[20108] Information this is a log
2013-12-06T00:29:21 PID[20108] Warning this is a warning
2013-12-06T00:29:22 PID[20108] Error this is an error"
);
var env = new ApplicationLogsTestEnvironment();
var reader = new ApplicationLogsReader(env, Mock.Of <ITracer>());
var results = reader.GetRecentLogs(6).ToList();
Assert.Equal(6, results.Count);
results[0].AssertLogEntry("2013-12-06T00:29:22+00:00", "Error", "this is an error");
results[1].AssertLogEntry("2013-12-06T00:29:22+00:00", "Error", "this is an error");
results[2].AssertLogEntry("2013-12-06T00:29:21+00:00", "Warning", "this is a warning");
results[3].AssertLogEntry("2013-12-06T00:29:21+00:00", "Warning", "this is a warning");
results[4].AssertLogEntry("2013-12-06T00:29:20+00:00", "Information", "this is a log");
results[5].AssertLogEntry("2013-12-06T00:29:20+00:00", "Information", "this is a log");
}
public void ApplicationLogsReaderWillNotOpenUnlimitedNumberOfFiles()
{
// This test would preferrably use a mocked file system but the System.IO.Abstractions.TestHelpers have
// some issues with returning the correct LastWrittenUtc and so this needs to run against a real file system for now.
var fs = new FileSystem();
FileSystemHelpers.Instance = fs;
using (var dir = new TemporaryApplicationLogDirectory(fs))
{
var logFileCount = 100;
var timestamp = DateTimeOffset.UtcNow;
for (int i = 0; i < logFileCount; i++)
{
timestamp = timestamp.AddSeconds(1);
dir.AddLogFile(
string.Format("log-{0}.txt", i),
string.Format("{0:s} PID[20108] Information this is a log\r\n", timestamp)
);
}
var env = new ApplicationLogsTestEnvironment(dir.RootDir);
var reader = new ApplicationLogsReader(env, Mock.Of <ITracer>());
var results = reader.GetRecentLogs(logFileCount).ToList();
// In this degenerate case with a large number of log files with only one line each, the limit
// on the number of log files that can be read will be hit and so not all 100 log entries will
// be returned.
Assert.Equal(ApplicationLogsReader.FileOpenLimit, results.Count);
results[0].AssertLogEntry(timestamp.ToString("s"), "Information", "this is a log");
}
}
public void ApplicationLogsReaderReturnsTheCorrectResultsWhenAccessedByMultipleThreads()
{
var fs = new FileSystem();
FileSystemHelpers.Instance = fs;
using (var dir = new TemporaryApplicationLogDirectory(fs))
{
dir.AddLogFile("log-1.txt",
@"2013-12-06T00:29:20 PID[20108] Information this is a log
2013-12-06T00:29:21 PID[20108] Warning this is a warning
2013-12-06T00:29:22 PID[20108] Error this is an error"
);
dir.AddLogFile("log-2.txt",
@"2013-12-06T00:29:20 PID[20108] Information this is a log
2013-12-06T00:29:21 PID[20108] Warning this is a warning
2013-12-06T00:29:22 PID[20108] Error this is an error"
);
dir.AddLogFile("log-3.txt", @"2014-01-09T00:18:30 NOT A VALID LOG FILE");
dir.AddLogFile("abc-123-logging-errors.txt",
@"2014-01-09T00:18:30
System.ApplicationException: The trace listener AzureTableTraceListener is disabled.
at Microsoft.WindowsAzure.WebSites.Diagnostics.AzureTableTraceListener.GetCloudTableClientFromEnvironment()
at Microsoft.WindowsAzure.WebSites.Diagnostics.AzureTableTraceListener.RefreshConfig()
--- End of inner exception stack trace ---"
);
dir.AddLogFile("log-4.txt",
@"2013-12-06T00:29:23 PID[20108] Information this is a log
2013-12-06T00:29:24 PID[20108] Information this is a log
2013-12-06T00:29:25 PID[20108] Information this is a log
2013-12-06T00:29:26 PID[20108] Information this is a log
2013-12-06T00:29:27 PID[20108] Information this is a log
2013-12-06T00:29:28 PID[20108] Information this is a log
2013-12-06T00:29:29 PID[20108] Warning this is a warning
2013-12-06T00:29:30 PID[20108] Error this is an error"
);
var env = new ApplicationLogsTestEnvironment(dir.RootDir);
var reader = new ApplicationLogsReader(env, Mock.Of <ITracer>());
var loopResult = Parallel.For(0, 10, (i) =>
{
var results = reader.GetRecentLogs(20).ToList();
Assert.Equal(14, results.Count);
});
Assert.True(loopResult.IsCompleted);
}
}
public void ApplicationLogsReaderMissingLogMessageIsValidEntry()
{
var fs = new ApplicationLogsTestFileSystem();
FileSystemHelpers.Instance = fs;
fs.AddLogFile("log-1.txt",
@"2013-12-06T00:29:20 PID[20108] Information this is a log
2013-12-06T00:29:21 PID[20108] Warning this is a warning
2013-12-06T00:29:21 PID[20108] Warning
2013-12-06T00:29:22 PID[20108] Error this is an error"
);
var env = new ApplicationLogsTestEnvironment();
var reader = new ApplicationLogsReader(env, Mock.Of <ITracer>());
var results = reader.GetRecentLogs(6).ToList();
Assert.Equal(4, results.Count);
results[1].AssertLogEntry("2013-12-06T00:29:21+00:00", "Warning", "");
}
public void ApplicationLogsReaderStartsWithMostRecentlyWrittenFile()
{
var fs = new ApplicationLogsTestFileSystem();
FileSystemHelpers.Instance = fs;
fs.AddLogFile("log-1.txt",
@"2013-12-06T00:29:20 PID[20108] Information this is the most recent log",
DateTimeOffset.Parse("2013-12-06T00:29:22+00:00")
);
fs.AddLogFile("log-2.txt",
@"2013-12-06T00:29:20 PID[20108] Information this is a log",
DateTimeOffset.Parse("2013-12-06T00:29:20+00:00")
);
var env = new ApplicationLogsTestEnvironment();
var reader = new ApplicationLogsReader(env, Mock.Of <ITracer>());
var results = reader.GetRecentLogs(1).ToList();
Assert.Equal(1, results.Count);
results[0].AssertLogEntry("2013-12-06T00:29:20+00:00", "Information", "this is the most recent log");
}
public void ApplicationLogsReaderIncompleteLogEntryIsTreatedAsContentsOfLastValidEntry()
{
// This is really just a variation on the multiline tests but is here to demonstrate that any 'junk' lines
// will just be treated as part of the preceeding log message
var fs = new ApplicationLogsTestFileSystem();
FileSystemHelpers.Instance = fs;
fs.AddLogFile("log-1.txt",
@"2013-12-06T00:29:20 PID[20108] Information this is a log
2013-12-06T00:29:21 PID[20108] Warning this is a warning
2013-12-06T00:29:21 PID[20108]
2013-12-06T00:29:22 PID[20108] Error this is an error"
);
var env = new ApplicationLogsTestEnvironment();
var reader = new ApplicationLogsReader(env, Mock.Of <ITracer>());
var results = reader.GetRecentLogs(6).ToList();
Assert.Equal(3, results.Count);
}