public void ConverterTest()
{
ValidationErrorsConverter converter = ValidationErrorsConverter.Default;
Assert.AreEqual(converter, ValidationErrorsConverter.Default);
AssertHelper.ExpectedException <NotSupportedException>(() => converter.ConvertBack(null, (Type[])null, null, null));
Assert.AreEqual(DependencyProperty.UnsetValue, converter.Convert((object[])null, null, null, null));
Assert.AreEqual(DependencyProperty.UnsetValue, converter.Convert(new[] { "WrongType" }, null, null, null));
List <ValidationError> validationErrors = new List <ValidationError>();
Assert.AreEqual("", converter.Convert(new[] { validationErrors }, null, null, null));
ExceptionValidationRule rule = new ExceptionValidationRule();
validationErrors.Add(new ValidationError(rule, new object(), "First error message", null));
Assert.AreEqual("First error message", converter.Convert(new[] { validationErrors }, null, null, null));
validationErrors.Add(new ValidationError(rule, new object(), "Second error message", null));
Assert.AreEqual("First error message" + Environment.NewLine + "Second error message",
converter.Convert(new[] { validationErrors }, null, null, null));
}
/// <summary>
/// This method is being invoked during initialization.
/// </summary>
/// <param name="provider">Provides access to the bound items.</param>
/// <returns>The binding expression that is created by
/// the base class.</returns>
public override object ProvideValue(IServiceProvider provider)
{
ValidationRule rule;
switch (Rule)
{
case CustomRule.DirectoryMustExists:
rule = new DirectoryMustExistsRule(false);
break;
case CustomRule.EmptyOrDirectoryMustExists:
rule = new DirectoryMustExistsRule(true);
break;
default:
rule = new ExceptionValidationRule();
break;
}
Binding.ValidationRules.Add(rule);
return(base.ProvideValue(provider));
}