public void getartist_should_thrown_exception_with_null_id()
{
var repository = new ArtistRepository(_catalogDataContextFactory.ContextInstance);
var sut = new GetArtistHandler(repository);
sut.Handle(null, CancellationToken.None).ShouldThrow <ArgumentNullException>();
}
public async Task getartist_should_return_right_artist(string id)
{
var repository = new ArtistRepository(_catalogDataContextFactory.ContextInstance);
var sut = new GetArtistHandler(repository);
var result = await sut.Handle(new GetArtistCommand { Id = new Guid(id) }, CancellationToken.None);
result.ShouldNotBeNull();
}