public void ValidateProperty(T value, [CallerMemberName] string propertyName = null)
{
if (_validationAttributes == null)
{
return;
}
var context = new ValidationContext(this)
{
MemberName = propertyName
};
var validationErrors = new List <ValidationResult>();
if (!DataValidator.TryValidateValue(value, context, validationErrors, _validationAttributes))
{
var errors = validationErrors.Select(error => error.ErrorMessage);
_erros = errors.ToList();
}
else
{
_erros.Clear();
}
RaisePropertyChanged(nameof(ErrorMessage));
RaisePropertyChanged(nameof(Errors));
RaisePropertyChanged(nameof(HasErrors));
}
public static void TryValidateValueThrowsIf_ValidationAttributeEnumerable_is_null()
{
var validationContext = new ValidationContext(new ToBeValidated());
validationContext.MemberName = null;
Assert.Throws <ArgumentNullException>(
() => Validator.TryValidateValue(new object(), validationContext, validationResults: null, validationAttributes: null));
}
public static void TryValidateValue_returns_true_if_no_attributes_to_validate_regardless_of_value()
{
var validationContext = new ValidationContext(new ToBeValidated());
validationContext.MemberName = "NoAttributesProperty";
Assert.True(Validator.TryValidateValue(null, validationContext,
validationResults: null, validationAttributes: Enumerable.Empty <ValidationAttribute>()));
Assert.True(Validator.TryValidateValue(new object(), validationContext,
validationResults: null, validationAttributes: Enumerable.Empty <ValidationAttribute>()));
}
public static void TryValidateValue_returns_true_if_Property_has_no_RequiredAttribute_and_value_is_valid()
{
var validationContext = new ValidationContext(new ToBeValidated());
validationContext.MemberName = "PropertyToBeTested";
var attributesToValidate = new ValidationAttribute[] { new ValidValueStringPropertyAttribute() };
Assert.True(Validator.TryValidateValue("Valid Value", validationContext, null, attributesToValidate));
var validationResults = new List <ValidationResult>();
Assert.True(Validator.TryValidateValue("Valid Value", validationContext, validationResults, attributesToValidate));
Assert.Equal(0, validationResults.Count);
}
public static void TryValidateValue_returns_false_if_Property_has_no_RequiredAttribute_and_value_is_invalid()
{
var validationContext = new ValidationContext(new ToBeValidated());
validationContext.MemberName = "PropertyWithRequiredAttribute";
var attributesToValidate = new ValidationAttribute[] { new ValidValueStringPropertyAttribute() };
Assert.False(Validator.TryValidateValue("Invalid Value", validationContext, null, attributesToValidate));
var validationResults = new List <ValidationResult>();
Assert.False(Validator.TryValidateValue("Invalid Value", validationContext, validationResults, attributesToValidate));
Assert.Equal(1, validationResults.Count);
Assert.Equal("ValidValueStringPropertyAttribute.IsValid failed for value Invalid Value", validationResults[0].ErrorMessage);
}
public static void TryValidateValue_returns_false_if_Property_has_RequiredAttribute_and_value_is_null()
{
var validationContext = new ValidationContext(new ToBeValidated());
validationContext.MemberName = "PropertyWithRequiredAttribute";
var attributesToValidate = new ValidationAttribute[] { new RequiredAttribute(), new ValidValueStringPropertyAttribute() };
Assert.False(Validator.TryValidateValue(null, validationContext, null, attributesToValidate));
var validationResults = new List <ValidationResult>();
Assert.False(Validator.TryValidateValue(null, validationContext, validationResults, attributesToValidate));
Assert.Equal(1, validationResults.Count);
// cannot check error message - not defined on ret builds
}
public static void TryValidateValueThrowsIf_ValidationContext_is_null()
{
Assert.Throws <ArgumentNullException>(
() => Validator.TryValidateValue(new object(),
validationContext: null, validationResults: null, validationAttributes: Enumerable.Empty <ValidationAttribute>()));
}