public async Task SendAsync_should_send_mail_to_the_destination()
{
const string? @from = "*****@*****.**";
const string? to = "*****@*****.**";
const string? subject = "my test e-mail";
const string? content = "<h1>Test e-mail</h1>";
_sendgridClient.SendEmailAsync(Arg.Any <SendGridMessage>(), Arg.Any <CancellationToken>())
.Returns(new Response(HttpStatusCode.Accepted, null, null));
var message = _mockCreator.GetSendGridMessage(from, to, subject, content);
var sent = await _sender.SendAsync(message, CancellationToken.None);
sent.Should().BeTrue();
await _sendgridClient.Received(1)
.SendEmailAsync(Arg.Any <SendGridMessage>(), Arg.Any <CancellationToken>());
var messageSent = (SendGridMessage)_sendgridClient.ReceivedCalls().Single().GetArguments()[0] !;
messageSent.From.Email.Should().Be(from);
messageSent.Personalizations.Single().Tos.Single().Email.Should().Be(to);
messageSent.Personalizations.Single().Subject.Should().Be(subject);
messageSent.Contents.Should().AllSatisfy(c => c.Value.Should().Be(content));
}