public void Test_Refactor_Get_Previous_Result()
{
string res;
Refactor ref_calculator = new Refactor();
ref_calculator.Calculate("1+2+4*2+11/5/1-3*9/2+1-2");
res = ref_calculator.getResult();
Assert.AreEqual("8", res);
res = ref_calculator.getPreviousResult(1);
Assert.AreEqual("10", res);
res = ref_calculator.getPreviousResult(10);
Assert.AreEqual("3", res);
// check to see if buffer will wrap
ref_calculator.Calculate("1+2+4*2+11/5/1-3*9/2+1-2+5");
res = ref_calculator.getResult();
Assert.AreEqual("13", res);
res = ref_calculator.getPreviousResult(1);
Assert.AreEqual("8", res);
res = ref_calculator.getPreviousResult(10);
Assert.AreEqual("7", res);
}
public void Test_Refactor_Get_PreviousResult_Index()
{
string res;
Refactor ref_calculator = new Refactor();
res = ref_calculator.getPreviousResult(0);
Assert.AreEqual("Error: Index must between 1 and 10", res);
res = ref_calculator.getPreviousResult(11);
Assert.AreEqual("Error: Index must between 1 and 10", res);
}
