public async Task InstancesWriteToSameDirectory()
{
var now = DateTimeOffset.Now;
if (now.Hour == 23)
{
// Don't bother trying to run this test when it's almost midnight.
return;
}
var path = Path.Combine(TempPath, Path.GetRandomFileName());
Directory.CreateDirectory(path);
try
{
var options = new W3CLoggerOptions()
{
LogDirectory = path,
RetainedFileCountLimit = 10,
FileSizeLimit = 5
};
await using (var logger = new FileLoggerProcessor(new OptionsWrapperMonitor <W3CLoggerOptions>(options), new HostingEnvironment(), NullLoggerFactory.Instance))
{
for (int i = 0; i < 3; i++)
{
logger.EnqueueMessage("Message");
}
var filePath = Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.0002.txt"));
// Pause for a bit before disposing so logger can finish logging
await WaitForFile(filePath).DefaultTimeout();
}
// Second instance should pick up where first one left off
await using (var logger = new FileLoggerProcessor(new OptionsWrapperMonitor <W3CLoggerOptions>(options), new HostingEnvironment(), NullLoggerFactory.Instance))
{
for (int i = 0; i < 3; i++)
{
logger.EnqueueMessage("Message");
}
var filePath = Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.0005.txt"));
// Pause for a bit before disposing so logger can finish logging
await WaitForFile(filePath).DefaultTimeout();
}
var actualFiles1 = new DirectoryInfo(path)
.GetFiles()
.Select(f => f.Name)
.OrderBy(f => f)
.ToArray();
Assert.Equal(6, actualFiles1.Length);
for (int i = 0; i < 6; i++)
{
Assert.Contains($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.{i:0000}.txt", actualFiles1[i]);
}
// Third instance should roll to 5 most recent files
options.RetainedFileCountLimit = 5;
await using (var logger = new FileLoggerProcessor(new OptionsWrapperMonitor <W3CLoggerOptions>(options), new HostingEnvironment(), NullLoggerFactory.Instance))
{
logger.EnqueueMessage("Message");
// Pause for a bit before disposing so logger can finish logging
await WaitForFile(Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.0006.txt"))).DefaultTimeout();
await WaitForRoll(Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.0000.txt"))).DefaultTimeout();
await WaitForRoll(Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.0001.txt"))).DefaultTimeout();
}
var actualFiles2 = new DirectoryInfo(path)
.GetFiles()
.Select(f => f.Name)
.OrderBy(f => f)
.ToArray();
Assert.Equal(5, actualFiles2.Length);
for (int i = 0; i < 5; i++)
{
Assert.Equal($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.{i + 2:0000}.txt", actualFiles2[i]);
}
}
finally
{
Helpers.DisposeDirectory(path);
}
}
public async Task WritesToNewFileOnNewInstance()
{
var now = DateTimeOffset.Now;
if (now.Hour == 23)
{
// Don't bother trying to run this test when it's almost midnight.
return;
}
var path = Path.Combine(TempPath, Path.GetRandomFileName());
Directory.CreateDirectory(path);
try
{
var options = new W3CLoggerOptions()
{
LogDirectory = path,
FileSizeLimit = 5
};
var fileName1 = Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.0000.txt"));
var fileName2 = Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.0001.txt"));
var fileName3 = Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.0002.txt"));
await using (var logger = new FileLoggerProcessor(new OptionsWrapperMonitor <W3CLoggerOptions>(options), new HostingEnvironment(), NullLoggerFactory.Instance))
{
logger.EnqueueMessage("Message one");
logger.EnqueueMessage("Message two");
// Pause for a bit before disposing so logger can finish logging
await WaitForFile(fileName2).DefaultTimeout();
}
// Even with a big enough FileSizeLimit, we still won't try to write to files from a previous instance.
options.FileSizeLimit = 10000;
await using (var logger = new FileLoggerProcessor(new OptionsWrapperMonitor <W3CLoggerOptions>(options), new HostingEnvironment(), NullLoggerFactory.Instance))
{
logger.EnqueueMessage("Message three");
// Pause for a bit before disposing so logger can finish logging
await WaitForFile(fileName3).DefaultTimeout();
}
var actualFiles = new DirectoryInfo(path)
.GetFiles()
.Select(f => f.Name)
.OrderBy(f => f)
.ToArray();
Assert.Equal(3, actualFiles.Length);
Assert.True(File.Exists(fileName1));
Assert.True(File.Exists(fileName2));
Assert.True(File.Exists(fileName3));
Assert.Equal("Message one" + Environment.NewLine, File.ReadAllText(fileName1));
Assert.Equal("Message two" + Environment.NewLine, File.ReadAllText(fileName2));
Assert.Equal("Message three" + Environment.NewLine, File.ReadAllText(fileName3));
}
finally
{
Helpers.DisposeDirectory(path);
}
}
public async Task RespectsMaxFileCount()
{
var path = Path.Combine(TempPath, Path.GetRandomFileName());
Directory.CreateDirectory(path);
File.WriteAllText(Path.Combine(path, "randomFile.txt"), "Text");
try
{
string lastFileName;
var now = DateTimeOffset.Now;
var tomorrow = now.AddDays(1);
var options = new W3CLoggerOptions()
{
LogDirectory = path,
RetainedFileCountLimit = 3,
FileSizeLimit = 5
};
await using (var logger = new FileLoggerProcessor(new OptionsWrapperMonitor <W3CLoggerOptions>(options), new HostingEnvironment(), NullLoggerFactory.Instance))
{
for (int i = 0; i < 10; i++)
{
logger.EnqueueMessage("Message");
}
lastFileName = Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.0009.txt"));
// Pause for a bit before disposing so logger can finish logging
try
{
await WaitForFile(lastFileName).DefaultTimeout();
for (int i = 0; i < 6; i++)
{
await WaitForRoll(Path.Combine(path, FormattableString.Invariant($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}.{i:0000}.txt"))).DefaultTimeout();
}
}
catch
{
// Midnight could have struck between taking the DateTime & writing the log.
// It also could have struck any time after writing the first file.
// So we keep going even if waiting timed out, in case we're wrong about the assumed file name
}
}
var actualFiles = new DirectoryInfo(path)
.GetFiles()
.Select(f => f.Name)
.OrderBy(f => f)
.ToArray();
Assert.Equal(4, actualFiles.Length);
Assert.Equal("randomFile.txt", actualFiles[0]);
for (int i = 1; i < 4; i++)
{
// File name will either start with today's date or tomorrow's date (if midnight struck during the execution of the test)
Assert.True((actualFiles[i].StartsWith($"{options.FileName}{now.Year:0000}{now.Month:00}{now.Day:00}", StringComparison.InvariantCulture)) ||
(actualFiles[i].StartsWith($"{options.FileName}{tomorrow.Year:0000}{tomorrow.Month:00}{tomorrow.Day:00}", StringComparison.InvariantCulture)));
}
}
finally
{
Helpers.DisposeDirectory(path);
}
}