Host file contention will no longer cause contents to be deleted. Fixes

#4

RichardSzalay.Hosts.Tests/FileInfoResourceSpec.cs

@@ -0,0 +1,45 @@
+using Machine.Specifications;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+namespace RichardSzalay.Hosts.Tests
+{
+    public class FileInfoResourceSpec
+    {
+        [Subject(typeof(FileInfoResource), "OpenWrite")]
+        public class When_writing_to_the_resource
+        {
+            Establish context = () =>
+            {
+                tempFile = new FileInfo(Path.GetTempFileName());
+
+                File.WriteAllText(tempFile.FullName, "Test original longer text");
+
+                sut = new FileInfoResource(tempFile);
+            };
+
+            Because of = () =>
+            {
+                using (Stream stream = sut.OpenWrite())
+                using (StreamWriter writer = new StreamWriter(stream))
+                {
+                    writer.Write("Test 2");
+
+                    stream.Flush();
+                }
+
+                result = File.ReadAllText(tempFile.FullName);
+            };
+
+            It should_overwrite_existing_contents = () =>
+                result.ShouldEqual("Test 2");
+
+            static FileInfoResource sut;
+            static FileInfo tempFile;
+            static string result;
+        }
+    }
+}

RichardSzalay.Hosts.Tests/RichardSzalay.Hosts.Tests.csproj

@@ -47,6 +47,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="FileInfoResourceSpec.cs" />
     <Compile Include="HostEntrySpec.cs" />
     <Compile Include="HostsFileSpec.cs" />
     <Compile Include="Infrastructure\StringResource.cs" />

RichardSzalay.Hosts/FileInfoResource.cs

@@ -26,9 +26,7 @@ public Stream OpenRead()
 
         public Stream OpenWrite()
         {
-            this.file.Delete();
-
-            return this.file.OpenWrite();
+            return File.Create(this.file.FullName);
         }
 
         #endregion