Include the running application name as part of the default temp path

Author: rmja

src/HttpClient.Cache/Files/FileCache.cs

@@ -1,4 +1,5 @@
 using System.Net;
+using System.Reflection;
 
 namespace HttpClientCache.Files;
 
@@ -15,6 +16,8 @@ public class FileCache : IHttpCache
 
     public static FileCache Default { get; } = new();
 
+    public DirectoryInfo RootDirectory => _rootDirectory;
+
     /// <summary>
     /// Gets or sets the maximum number of cache entries allowed in the cache directory.
     /// Note that this is a soft limit, and the actual number of entries may exceed this value temporarily during purging.
@@ -35,7 +38,13 @@ public class FileCache : IHttpCache
     /// Creates a new instance of <see cref="FileCache"/> with the default root directory.
     /// </summary>
     public FileCache()
-        : this(Path.Combine(Path.GetTempPath(), "HttpClient.Cache.Files.FileCache")) { }
+        : this(
+            Path.Combine(
+                Path.GetTempPath(),
+                "HttpClient.FileCache",
+                Assembly.GetEntryAssembly()!.GetName().Name!
+            )
+        ) { }
 
     /// <summary>
     /// Creates a new instance of <see cref="FileCache"/> with the specified root directory.

test/HttpClient.Cache.Tests/File/FileCacheTests.cs

@@ -28,6 +28,22 @@ public void Dispose()
         Assert.Empty(_rootDirectory.EnumerateFiles("*.*", SearchOption.AllDirectories));
     }
 
+    [Fact]
+    public void DefaultRootDirectory()
+    {
+        // Given
+        var cache = new FileCache();
+
+        // When
+        var rootDirectory = cache.RootDirectory;
+
+        // Then
+        Assert.Equal(
+            Path.Combine(Path.GetTempPath(), "HttpClient.FileCache", "HttpClient.Cache.Tests"),
+            rootDirectory.FullName
+        );
+    }
+
     [Fact]
     public async Task Get_KeyDoesNotExist()
     {