Feature/file appender

src/LogLibrary.Tests/LoggerFixture.cs

@@ -1,63 +1,63 @@
-using NSubstitute;
-using NUnit.Framework;
-
-#pragma warning disable S2699 // Tests should include assertions
-
-namespace LogLibrary.Tests
-{
-    [TestFixture]
-    public class LoggerFixture
-    {
-        private Logger _sut;
-        ILogDestination _logDestination;
-
-        [SetUp]
-        public void SetUp()
-        {
-            _logDestination = Substitute.For<ILogDestination>();
-        }
-
-        private void CreateLogger(LogLevel level)
-        {
-            _sut = new Logger(level, _logDestination);
-        }
-
-        [Test]
-        public void Verify_debug_log_not_logged_if_level_is_info()
-        {
-            CreateLogger(LogLevel.Info);
-            _sut.Log(LogLevel.Debug, "This should not be logged");
-            _logDestination.DidNotReceive().AddLog(Arg.Any<LogMessage>());
-        }
-
-        [Test]
-        public void Verify_info_log_is_logged_if_level_is_info()
-        {
-            CreateLogger(LogLevel.Info);
-            _sut.Log(LogLevel.Info, "This should not be logged");
-            _logDestination.Received().AddLog(Arg.Any<LogMessage>());
-        }
-
+using NSubstitute;
+using NUnit.Framework;
+
+#pragma warning disable S2699 // Tests should include assertions
+
+namespace LogLibrary.Tests
+{
+    [TestFixture]
+    public class LoggerFixture
+    {
+        private Logger _sut;
+        private ILogDestination _logDestination;
+
+        [SetUp]
+        public void SetUp()
+        {
+            _logDestination = Substitute.For<ILogDestination>();
+        }
+
+        private void CreateLogger(LogLevel level)
+        {
+            _sut = new Logger(level, _logDestination);
+        }
+
+        [Test]
+        public void Verify_debug_log_not_logged_if_level_is_info()
+        {
+            CreateLogger(LogLevel.Info);
+            _sut.Log(LogLevel.Debug, "This should not be logged");
+            _logDestination.DidNotReceive().AddLog(Arg.Any<LogMessage>());
+        }
+
+        [Test]
+        public void Verify_info_log_is_logged_if_level_is_info()
+        {
+            CreateLogger(LogLevel.Info);
+            _sut.Log(LogLevel.Info, "This should not be logged");
+            _logDestination.Received().AddLog(Arg.Any<LogMessage>());
+        }
+
         [Test]
 
         public void Verify_warn_log_is_logged_if_level_is_info()
-        {
-            CreateLogger(LogLevel.Info);
-            _sut.Log(LogLevel.Warn, "This should not be logged");
-            _logDestination.Received().AddLog(Arg.Any<LogMessage>());
-        }
-
-        [Test]
-        public void Verify_log_formatting()
-        {
-            CreateLogger(LogLevel.Info);
-            _sut.Log(LogLevel.Info, "This have a parameter {0}", "value");
+        {
+            CreateLogger(LogLevel.Info);
+            _sut.Log(LogLevel.Warn, "This should not be logged");
+            _logDestination.Received().AddLog(Arg.Any<LogMessage>());
+        }
+
+        [Test]
+        public void Verify_log_formatting()
+        {
+            CreateLogger(LogLevel.Info);
+            _sut.Log(LogLevel.Info, "This have a parameter {0}", "value");
             _logDestination.Received().AddLog(Arg.Do<LogMessage>(m =>
-            {
-                Assert.That(m.RenderedMessage, Is.EqualTo("This have a parameter value"));
-            }));
-        }
-    }
-}
-
-#pragma warning restore S2699 // Tests should include assertions
+            {
+                Assert.That(m.RenderedMessage, Is.EqualTo("This have a parameter value"));
+            }));
+        }
+    }
+}
+
+#pragma warning restore S2699 // Tests should include assertions

src/LogLibrary/FileLogDestination.cs

@@ -0,0 +1,21 @@
+using System;
+using System.IO;
+
+namespace LogLibrary
+{
+    public class FileLogDestination : ILogDestination
+    {
+        private readonly StreamWriter _streamWriter;
+
+        public FileLogDestination(String fileName)
+        {
+            var _fileStream = new FileStream(fileName, FileMode.OpenOrCreate);
+            _fileStream.Seek(0, SeekOrigin.End);
+            _streamWriter = new StreamWriter(_fileStream);
+        }
+        public void AddLog(LogMessage message)
+        {
+            _streamWriter.Write($"{message.Level}[{message.Timestamp}] - {message.RenderedMessage}");
+        }
+    }
+}

src/LogLibrary/LogLibrary.csproj

@@ -45,6 +45,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="ConsoleLogDestination.cs" />
+    <Compile Include="FileLogDestination.cs" />
     <Compile Include="ILogDestination.cs" />
     <Compile Include="Logger.cs" />
     <Compile Include="LogMessage.cs" />