Constraining T to class

Author: hendriklhf

src/Docker.DotNet/JsonRequestContent.cs

@@ -1,13 +1,14 @@
 namespace Docker.DotNet;
 
 internal class JsonRequestContent<T> : IRequestContent
+    where T : class
 {
     private readonly T _value;
     private readonly JsonSerializer _serializer;
 
     public JsonRequestContent(T val, JsonSerializer serializer)
     {
-        if (EqualityComparer<T>.Default.Equals(val, default))
+        if (val == null)
         {
             throw new ArgumentNullException(nameof(val));
         }

test/Docker.DotNet.Tests/JsonRequestContentTests.cs

@@ -10,12 +10,6 @@ public void Constructor_ThrowsArgumentNullException_WhenValueIsNull()
         Assert.Throws<ArgumentNullException>(() => new JsonRequestContent<object>(null, JsonSerializer.Instance));
     }
 
-    [Fact]
-    public void Constructor_ThrowsArgumentNullException_WhenValueIsDefault()
-    {
-        Assert.Throws<ArgumentNullException>(() => new JsonRequestContent<int>(0, JsonSerializer.Instance));
-    }
-
     [Fact]
     public void Constructor_ThrowsArgumentNullException_WhenSerializerIsNull()
     {