public async Task Post_ApplicationApprovedReceiverNotificationRequest()
{
await _controller.ApplicationApprovedReceiverNotification(_request);
_mediator.Verify(x =>
x.Send(It.Is <ReceiverApplicationApprovedEmailCommand>(c => c.PledgeId == _request.PledgeId && c.ApplicationId == _request.ApplicationId && c.BaseUrl == _request.BaseUrl &&
c.ReceiverEncodedAccountId == _request.ReceiverEncodedAccountId && c.ReceiverId == _request.ReceiverId),
It.IsAny <CancellationToken>()));
}