public void ToogleMinus2()
{
FracEditor testClass = new FracEditor("-14/3");
testClass.ToogleSign();
string result = "14/3";
Assert.AreEqual(result, testClass.ToString());
}
public void AddDeleteTest1()
{
FracEditor testClass = new FracEditor("123/123");
testClass.AddNumber(0);
testClass.AddNumber(1);
testClass.AddNumber(3);
testClass.AddSeparator();
testClass.ToogleSign();
string result = "-1/1013";
Assert.AreEqual(result, testClass.ToString());
}