MvvmValidation.Tests.Fakes.MockViewModel.SetupValidation C# (CSharp) Method

        private void SetupValidation()
        {
            var validationRules = new ValidationHelper();

            // Simple properties
            validationRules.AddRule(nameof(StringProperty),
                () =>
                    RuleResult.Assert(!string.IsNullOrEmpty(StringProperty),
                        "StringProperty cannot be null or empty string"));

            validationRules.AddRule(nameof(IntProperty),
                () => RuleResult.Assert(IntProperty > 0, "IntProperty should be greater than zero."));

            // Dependant properties
            validationRules.AddRule(nameof(RangeStart),
                nameof(RangeEnd),
                () => RuleResult.Assert(RangeEnd > RangeStart, "RangeEnd must be grater than RangeStart"));

            // Long-running validation (simulates call to a web service or something)
            validationRules.AddRule(
                nameof(StringProperty2),
                () =>
                {
                    SyncValidationRuleExecutedAsyncroniouslyDelegate?.Invoke();

                    return RuleResult.Assert(!string.IsNullOrEmpty(StringProperty2),
                        "StringProperty2 cannot be null or empty string");
                });

            Validation = validationRules;
            DataErrorInfoValidationAdapter = new NotifyDataErrorInfoAdapter(Validation);
        }