public void ConvertToNum_CheckForNumber_InvalidString()
{
PingPong testPingPong = new PingPong();
Assert.AreEqual(-1, testPingPong.ConvertToNum("Invalid input"));
}
public void ConvertToNum_CheckForPosNumber_InvalidNumber()
{
PingPong testPingPong = new PingPong();
Assert.AreEqual(-1, testPingPong.ConvertToNum("-7"));
}
public void ConvertToNum_CheckForNumber_Number()
{
PingPong testPingPong = new PingPong();
Assert.AreEqual(4, testPingPong.ConvertToNum("4"));
}