public void EveryNth(string a, int b, string expected)
{
// arrange
Conditionals obj = new Conditionals();
// act
string actual = obj.EveryNth(a, b);
// assert
Assert.AreEqual(expected, actual);
}
public void EveryNthtest(string str, int n, string expected)
{
Conditionals test = new Conditionals();
string actual = test.EveryNth(str, n);
Assert.AreEqual(expected, actual);
}