public void ValidateInstanceShouldValidateOnlyInstance() { ValidatableViewModel viewModel = GetValidatableViewModel(); ValidatorProvider.Register <SpyValidator>(); var instance = new object(); var instance2 = new object(); viewModel.AddInstance(instance); viewModel.AddInstance(instance2); viewModel.AddValidator <SpyValidator>(instance); viewModel.GetValidators().Count.ShouldEqual(4); viewModel.GetValidators().OfType <SpyValidator>().ForEach(validator => validator.ValidateAllCount = 0); viewModel.ValidateInstanceAsync(instance); foreach (SpyValidator result in viewModel.GetValidators().OfType <SpyValidator>()) { if (result.Context.Instance == instance) { result.ValidateAllCount.ShouldEqual(1); } else { result.ValidateAllCount.ShouldEqual(0); } } }