public void TestMethod1()
{
string result1 = AltCalculator.Calculate("3+4*2-1");
Assert.AreEqual("10", result1);
string result2 = AltCalculator.Calculate("4/2+1");
Assert.AreEqual("3", result2);
string result3 = AltCalculator.Calculate("2+4/3*10");
/// INT division of 4/3 gives 1
Assert.AreEqual("12", result3);
AltCalculator.Clear();
}
public void TestMethod2()
{
var result1 = AltCalculator.Calculate("1+1+1+1+1");
Assert.AreEqual("5", result1);
var result2 = AltCalculator.Calculate("2*2*2");
Assert.AreEqual("8", result2);
var result3 = AltCalculator.Calculate("1000/50");
Assert.AreEqual("20", result3);
Assert.AreEqual(result1, AltCalculator.GetPreviousResult(2));
Assert.AreEqual(result2, AltCalculator.GetPreviousResult(1));
Assert.AreEqual(result3, AltCalculator.GetPreviousResult(0));
Assert.AreEqual(string.Empty, AltCalculator.GetPreviousResult(3));
AltCalculator.Clear();
}