public void HighLow()
{
//Arrange
HighAndLow highAndLow = new HighAndLow();
//Assert
Assert.AreEqual("2 1", highAndLow.HighLow("1 2"));
Assert.AreEqual("9 1", highAndLow.HighLow("3 1 5 9 7"));
Assert.AreEqual("9782 -5", highAndLow.HighLow("2343 4561 9782 12 3456 -5"));
}