public void OnOpenedLifecycleHookCanWrapUnderlyingStream()
{
var gzipWrapper = new GZipHooks();
using (var tmp = TempFolder.ForCaller())
{
var path = tmp.AllocateFilename("txt");
var evt = Some.LogEvent("Hello, world!");
using (var sink = new FileSink(path, new JsonFormatter(), null, null, false, gzipWrapper))
{
sink.Emit(evt);
sink.Emit(evt);
}
// Ensure the data was written through the wrapping GZipStream, by decompressing and comparing against
// what we wrote
List <string> lines;
using (var textStream = new MemoryStream())
{
using (var fs = System.IO.File.OpenRead(path))
using (var decompressStream = new GZipStream(fs, CompressionMode.Decompress))
{
decompressStream.CopyTo(textStream);
}
textStream.Position = 0;
lines = textStream.ReadAllLines();
}
Assert.Equal(2, lines.Count);
Assert.Contains("Hello, world!", lines[0]);
}
}
/// <summary>
/// Emit the provided log event to the sink.
/// </summary>
/// <param name="logEvent">The log event to write.</param>
/// <remarks>Events that come in out-of-order (e.g. around the rollovers)
/// may end up written to a later file than their timestamp
/// would indicate.</remarks>
public void Emit(LogEvent logEvent)
{
if (logEvent == null)
{
throw new ArgumentNullException("logEvent");
}
lock (_syncRoot)
{
if (_isDisposed)
{
throw new ObjectDisposedException("The rolling file has been disposed.");
}
AlignCurrentFileTo(Clock.DateTimeNow);
// If the file was unable to be opened on the last attempt, it will remain
// null until the next checkpoint passes, at which time another attempt will be made to
// open it.
if (_currentFile != null)
{
_currentFile.Emit(logEvent);
}
}
}
static void WriteTwoEventsAndCheckOutputFileLength(long?maxBytes, Encoding encoding)
{
using (var tmp = TempFolder.ForCaller())
{
var path = tmp.AllocateFilename("txt");
var evt = Some.LogEvent("Irrelevant as it will be replaced by the formatter");
var actualEventOutput = "x";
var formatter = new FixedOutputFormatter(actualEventOutput);
var eventOuputLength = encoding.GetByteCount(actualEventOutput);
using (var sink = new FileSink(path, formatter, maxBytes, encoding: encoding))
{
sink.Emit(evt);
}
var size = new FileInfo(path).Length;
Assert.Equal(encoding.GetPreamble().Length + eventOuputLength, size);
//write a second event to the same file
using (var sink = new FileSink(path, formatter, maxBytes, encoding: encoding))
{
sink.Emit(evt);
}
size = new FileInfo(path).Length;
Assert.Equal(encoding.GetPreamble().Length + eventOuputLength * 2, size);
}
}
public static void OnOpenedLifecycleHookCanWriteFileHeader()
{
using (var tmp = TempFolder.ForCaller())
{
var headerWriter = new FileHeaderWriter("This is the file header");
var path = tmp.AllocateFilename("txt");
using (new FileSink(path, new JsonFormatter(), null, new UTF8Encoding(false), false, headerWriter))
{
// Open and write header
}
using (var sink = new FileSink(path, new JsonFormatter(), null, new UTF8Encoding(false), false, headerWriter))
{
// Length check should prevent duplicate header here
sink.Emit(Some.LogEvent());
}
var lines = System.IO.File.ReadAllLines(path);
Assert.Equal(2, lines.Length);
Assert.Equal(headerWriter.Header, lines[0]);
Assert.Equal('{', lines[1][0]);
}
}
public void FileControllerGetsCorrectString()
{
bool fileControllerGotLog = false;
var fileController = new Mock <IFileController>();
fileController.Setup(f => f.AppendLogEntry("this is correct log"))
.Callback(() => fileControllerGotLog = true);
var sink = new FileSink(fileController.Object);
sink.Emit("this is not correct log", Enums.LogLevel.Critical);
Assert.False(fileControllerGotLog);
sink.Emit("this is correct log", Enums.LogLevel.Trace);
Assert.True(fileControllerGotLog);
}
public void FileIsWrittenIfNonexistent()
{
using (var tmp = TempFolder.ForCaller())
{
var nonexistent = tmp.AllocateFilename("txt");
var evt = Some.LogEvent("Hello, world!");
using (var sink = new FileSink(nonexistent, new JsonFormatter(), null))
{
sink.Emit(evt);
}
var lines = System.IO.File.ReadAllLines(nonexistent);
Assert.Contains("Hello, world!", lines[0]);
}
}
// Simplifications:
// Events that come in out-of-order (e.g. around the rollovers)
// may end up written to a later file than their timestamp
// would indicate.
public void Emit(LogEvent logEvent)
{
if (logEvent == null)
{
throw new ArgumentNullException("logEvent");
}
lock (_syncRoot)
{
if (_isDisposed)
{
throw new ObjectDisposedException("The rolling file has been disposed.");
}
AlignCurrentFileTo(logEvent.Timestamp);
_currentFile.Emit(logEvent);
}
}
public void WhenLimitIsNotSpecifiedFileSizeIsNotRestricted()
{
const int maxBytes = 5000;
const int eventsToLimit = 10;
using (var tmp = TempFolder.ForCaller())
{
var path = tmp.AllocateFilename("txt");
var evt = Some.LogEvent(new string('n', maxBytes / eventsToLimit));
using (var sink = new FileSink(path, new JsonFormatter(), null))
{
for (var i = 0; i < eventsToLimit * 2; i++)
{
sink.Emit(evt);
}
}
var size = new FileInfo(path).Length;
Assert.True(size > maxBytes * 2);
}
}
public void FileIsAppendedToWhenAlreadyCreated()
{
using (var tmp = TempFolder.ForCaller())
{
var path = tmp.AllocateFilename("txt");
var evt = Some.LogEvent("Hello, world!");
using (var sink = new FileSink(path, new JsonFormatter(), null))
{
sink.Emit(evt);
}
using (var sink = new FileSink(path, new JsonFormatter(), null))
{
sink.Emit(evt);
}
var lines = System.IO.File.ReadAllLines(path);
Assert.Contains("Hello, world!", lines[0]);
Assert.Contains("Hello, world!", lines[1]);
}
}