public void ConstructorHappyPath()
        {
            // Arrange
            var sender = new Mock <ISender>().Object;

            // Act
            var sendingService = new DataSendingService(sender);

            // Assert
            sendingService.Sender.Should().BeSameAs(sender);
        }
        public void Prompt()
        {
            // Arrange
            var sender = new Mock <ISender>().Object;

            var sendingService = new DataSendingService(sender).Unlock();

            // Act
            string prompt = sendingService.Prompt;

            // Assert
            prompt.Should().Be("Enter data to send.");
        }