Added more unit tests for JsonSerializerSettingsTestBuilder.

Author: u-ashikov

test/MyTested.AspNetCore.Mvc.Controllers.Views.ActionResults.Test/BuildersTests/ActionResultsTests/JsonTests/JsonSerializerTestBuilderTests.cs

@@ -222,6 +222,39 @@ public void WithContractResolverShouldThrowExceptionWithIncorrectValue()
                 "When calling JsonWithSettingsAction action in MvcController expected JSON result serializer settings to have the same contract resolver as the provided one, but in fact it was different.");
         }
 
+        [Fact]
+        public void WithContractResolverOfTypeShouldNotThrowException()
+        {
+            var jsonSerializerSettings = TestObjectFactory.GetJsonSerializerSettings();
+
+            MyController<MvcController>
+                    .Instance()
+                    .Calling(c => c.JsonWithSpecificSettingsAction(jsonSerializerSettings))
+                    .ShouldReturn()
+                    .Json(json => json
+                        .WithJsonSerializerSettings(s =>
+                            s.WithContractResolverOfType(typeof(CamelCasePropertyNamesContractResolver))));
+        }
+
+        [Fact]
+        public void WithContractResolverOfTypeShouldThrowException()
+        {
+            var jsonSerializerSettings = TestObjectFactory.GetJsonSerializerSettings();
+
+            Test.AssertException<JsonResultAssertionException>(
+                () =>
+                {
+                    MyController<MvcController>
+                        .Instance()
+                        .Calling(c => c.JsonWithSpecificSettingsAction(jsonSerializerSettings))
+                        .ShouldReturn()
+                        .Json(json => json
+                            .WithJsonSerializerSettings(s =>
+                                s.WithContractResolverOfType(typeof(IContractResolver))));
+                },
+                "When calling JsonWithSpecificSettingsAction action in MvcController expected JSON result serializer settings to have IContractResolver, but in fact found CamelCasePropertyNamesContractResolver.");
+        }
+
         [Fact]
         public void WithoutContractResolverOfTypeShouldThrowException()
         {