public void Foo_AutoMoq_WithReturnValue()
{
_fixture.Customize(new AutoMoqCustomization());
Mock <IEmailGateway> mockGateway = _fixture.Freeze <Mock <IEmailGateway> >();
EmailMessageBuffer sut = _fixture.Create <EmailMessageBuffer>();
EmailMessage emailMessage = _fixture.Create <EmailMessage>();
string wasSent = sut.SendOne(emailMessage);
wasSent.Should().Be("The call was successful.");
mockGateway.Verify(x => x.Send(emailMessage), Times.Once);
}