PR code review items from #23

Author: nblumhardt

src/Serilog.Sinks.File/Sinks/File/WriteCountingStream.cs

@@ -60,7 +60,7 @@ public override long Position
 
         public override long Seek(long offset, SeekOrigin origin)
         {
-            return _stream.Seek(offset, origin);
+            throw new InvalidOperationException($"Seek operations are not available through `{nameof(WriteCountingStream)}`.");
         }
 
         public override void SetLength(long value)

test/Serilog.Sinks.File.Tests/FileSinkTests.cs

@@ -143,12 +143,12 @@ public void WhenLimitIsNotSpecifiedAndEncodingHasNoPreambleDataIsCorrectlyAppend
             WriteTwoEventsAndCheckOutputFileLength(maxBytes, encoding);
         }
 
-        private static void WriteTwoEventsAndCheckOutputFileLength(long? maxBytes, Encoding encoding)
+        static void WriteTwoEventsAndCheckOutputFileLength(long? maxBytes, Encoding encoding)
         {
             using (var tmp = TempFolder.ForCaller())
             {
                 var path = tmp.AllocateFilename("txt");
-                var evt = Some.LogEvent("Irelevant as it will be replaced by the formatter ");
+                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);

test/Serilog.Sinks.File.Tests/FixedOutputFormatter.cs renamed to test/Serilog.Sinks.File.Tests/Support/FixedOutputFormatter.cs

@@ -1,12 +1,8 @@
 using Serilog.Formatting;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 using Serilog.Events;
 using System.IO;
 
-namespace Serilog.Tests
+namespace Serilog.Tests.Support
 {
     public class FixedOutputFormatter : ITextFormatter
     {