public void TearDown()
 {
     _validParentheses = null;
 }
 public void Test(string input, bool expected)
 {
     Assert.AreEqual(expected, ValidParentheses.IsValidParentheses(input));
     Assert.AreEqual(expected, ValidParentheses.IsValidParentheses(input));
 }
 public void SetUp()
 {
     _validParentheses = new ValidParentheses();
 }