public void CheckReturnLastProblemMethod()
{
MathProblemStack mathProblems = new MathProblemStack();
mathProblems.addNewMathProblem("2 + 2");
mathProblems.addNewMathProblem("7 + 9");
string expectedResult = "7 + 9";
string actualResult = mathProblems.getLastMathProblem();
Assert.AreEqual(expectedResult, actualResult);
}
public void CheckAddNewProblemMethod()
{
MathProblemStack mathProblems = new MathProblemStack();
mathProblems.addNewMathProblem("2 + 2");
string expectedResult = "2 + 2";
string actualResult = mathProblems.Stack.Peek().ToString();
Assert.AreEqual(expectedResult, actualResult);
}