public void Should_Allow_External_Urls()
{
var service = new DefaultUrlService(null, null);
validInternalUrls.ToList().ForEach(url => Assert.IsTrue(service.ValidateExternalUrl(url), string.Format("URL must be valid: '{0}'", url)));
validExternalUrls.ToList().ForEach(url => Assert.IsTrue(service.ValidateExternalUrl(url), string.Format("URL must be valid: '{0}'", url)));
}