using System;
using AutoMapper;
using NUnit.Framework;

[TestFixture]
public class When_resolving_the_gravatar_url_for_an_email_address
{
    IValueResolver resolver = new GravatarUrlResolver();

    [Test]
    [ExpectedException(typeof(ArgumentNullException))]
    public void Should_throw_exception_if_resolution_source_is_null()
    {
        resolver.Resolve(null);
    }

    [Test]
    public void Should_return_gravatar_url_with_md5_hash_of_email_address()
    {
        Uri url = (Uri)resolver.Resolve(new ResolutionResult("iHaveAn@email.com")).Value;
        Assert.AreEqual("http://www.gravatar.com/avatar/3b3be63a4c2a439b013787725dfce802", url.AbsoluteUri);
    }

    [TestFixture]
    public class and_the_email_address_is_null_or_empty : When_resolving_the_gravatar_url_for_an_email_address
    {
        [Test]
        public void Should_return_default_url([Values(null, "")]string email)
        {
            Uri url = (Uri)resolver.Resolve(new ResolutionResult(email)).Value;
            Assert.AreEqual("http://www.gravatar.com/avatar/?d=identicon", url.AbsoluteUri);
        }
    }
}