public void ShouldDrainWater_ThrowsExceptionIfCurrentVolumeIsTooLow()
{
// Arrange
var waterTank = new WaterTank(capacity: 1000m);
// Act
Action action = () => waterTank.Drain(100m);
// Assert
action.Should().Throw <ArgumentException>();
}
public void ShouldDrainWater_Success()
{
// Arrange
var waterTank = new WaterTank(capacity: 1000m);
waterTank.Fill(300m);
// Act
var drainedVolume = waterTank.Drain(100m);
// Assert
drainedVolume.Should().Be(100m);
waterTank.CurrentVolume.Should().Be(200m);
}
