fix tests

Author: KSemenenko

ManagedCode.MimeTypes.Generator/ManagedCode.MimeTypes.Generator.csproj

@@ -1,9 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <LangVersion>10</LangVersion>
+        <LangVersion>13</LangVersion>
         <IsPackable>false</IsPackable>
-        <TargetFrameworks>netstandard2.0;net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
+        <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     </PropertyGroup>
 
     <ItemGroup>

ManagedCode.MimeTypes.Tests/GeneratorTests.cs

@@ -32,6 +32,7 @@ public void GeneratedPropertiesTest()
         MimeHelper.PNG.ShouldBe("image/png");
         MimeHelper.MP4.ShouldBe("video/mp4");
         MimeHelper._7Z.ShouldBe("application/x-7z-compressed");
+        MimeHelper.EVENT_STREAM.ShouldBe("text/event-stream");
     }
 
     [Fact]

ManagedCode.MimeTypes/MimeHelper.cs

@@ -68,9 +68,9 @@ public static string GetMimeTypeByContent(string filePath)
             fs.ReadExactly(fileHeader, 0, fileHeader.Length);
         }
 
-        foreach (var mime in MimeTypes)
+        foreach (var mime in MimeTypesForContent)
         {
-            if (fileHeader.AsSpan().Slice(0, mime.Key.Length).SequenceEqual(mime.Key))
+            if (fileHeader.AsSpan().Slice(0, mime.Key.Length).SequenceEqual(mime.Key.AsSpan()))
             {
                 return mime.Value;
             }
@@ -84,9 +84,9 @@ public static string GetMimeTypeByContent(Stream fileStream)
         byte[] fileHeader = new byte[4];
         fileStream.ReadExactly(fileHeader, 0, fileHeader.Length);
 
-        foreach (var mime in MimeTypes)
+        foreach (var mime in MimeTypesForContent)
         {
-            if (fileHeader.AsSpan().Slice(0, mime.Key.Length).SequenceEqual(mime.Key))
+            if (fileHeader.AsSpan().Slice(0, mime.Key.Length).SequenceEqual(mime.Key.AsSpan()))
             {
                 return mime.Value;
             }