feat(Tests): RefitSettings tests

Refit.Tests/RefitSettings.cs

@@ -1,6 +1,30 @@
-namespace Refit.Tests;
+using Xunit;
 
-public class RefitSettings
+namespace Refit.Tests;
+
+public class RefitSettingsTests
 {
-
+    [Fact]
+    public void Can_CreateRefitSettings_WithoutException()
+    {
+        var contentSerializer = new NewtonsoftJsonContentSerializer();
+        var urlParameterFormatter = new DefaultUrlParameterFormatter();
+        var urlParameterKeyFormatter = new CamelCaseUrlParameterKeyFormatter();
+        var formUrlEncodedParameterFormatter = new DefaultFormUrlEncodedParameterFormatter();
+
+        var exception = Record.Exception(() => new RefitSettings());
+        Assert.Null(exception);
+
+        exception = Record.Exception(() => new RefitSettings(contentSerializer));
+        Assert.Null(exception);
+
+        exception = Record.Exception(() => new RefitSettings(contentSerializer, urlParameterFormatter));
+        Assert.Null(exception);
+
+        exception = Record.Exception(() => new RefitSettings(contentSerializer, urlParameterFormatter, formUrlEncodedParameterFormatter));
+        Assert.Null(exception);
+
+        exception = Record.Exception(() => new RefitSettings(contentSerializer, urlParameterFormatter, formUrlEncodedParameterFormatter, urlParameterKeyFormatter));
+        Assert.Null(exception);
+    }
 }