public void ParamlessConstructedSpeedUnit_ShouldBeEqualToMetrePerSecond()
            {
                // arrange
                var paramlessConstructedSpeedUnit = new SpeedUnit();
                var metrePerSecond = SpeedUnit.MetrePerSecond;

                // act
                // assert
                metrePerSecond.Equals(paramlessConstructedSpeedUnit).Should().BeTrue(because: "'SpeedUnit.MetrePerSecond' should be equal 'new SpeedUnit()'");
                paramlessConstructedSpeedUnit.Equals(metrePerSecond).Should().BeTrue(because: "'new SpeedUnit()' should be equal 'SpeedUnit.MetrePerSecond'");
            }