no need to throw to report errors

Author: lbargaoanu

docs/source/Configuration-validation.md

@@ -55,4 +55,4 @@ To skip validation altogether for this map, use `MemberList.None`. That's the de
 
 ## Custom validations
 
-You can add custom validations through an extension point. See [here](https://github.com/AutoMapper/AutoMapper/blob/bdc0120497d192a2741183415543f6119f50a982/src/UnitTests/CustomValidations.cs#L42).
+You can add custom validations through an extension point. See [here](https://github.com/AutoMapper/AutoMapper/blob/master/src/UnitTests/CustomValidations.cs).

src/UnitTests/CustomValidations.cs

@@ -38,7 +38,7 @@ public void Should_call_the_validator()
                 cfg.CreateMap<Source, Dest>();
             });
 
-            config.AssertConfigurationIsValid();
+            new Action(config.AssertConfigurationIsValid).ShouldThrow<AutoMapperConfigurationException>().Message.ShouldBe(nameof(When_using_custom_validation));
 
             _calledForRoot.ShouldBeTrue();
             _calledForValues.ShouldBeTrue();
@@ -55,6 +55,7 @@ private void Validator(ValidationContext context)
                 context.Types.DestinationType.ShouldBe(typeof(Dest));
                 context.ObjectMapper.ShouldBeNull();
                 context.MemberMap.ShouldBeNull();
+                context.Exceptions.Add(new AutoMapperConfigurationException(nameof(When_using_custom_validation)));
             }
             else
             {