public void RationnalNormalizeTest()
{
Rationnal r = new Rationnal(420, -840);
string ExpectedResult = "-1/2";
Assert.AreEqual(ExpectedResult, r.ToString());
}
public void RationnalAdditionTest()
{
Rationnal r1 = new Rationnal(1, 2),
r2 = new Rationnal(-2, 7);
Rationnal CurrentResult = r1 + r2;
string ExpectedResult = "3/14";
Assert.AreEqual(ExpectedResult, CurrentResult.ToString());
}