public void TestSub()
{
Random r = new Random();
int num1 = r.Next(-100, 100);
int num2 = r.Next(-100, 100);
Number n1 = new DecimalNumber(num1.ToString());
Number n2 = new DecimalNumber(num2.ToString());
Number sub = n1.SubFromCurrent(n2);
Number sub2 = n2.SubFromCurrent(n1);
Assert.AreEqual((num1 - num2).ToString(), con.Sub(n1, n2));
Assert.AreEqual((num2 - num1).ToString(), con.Sub(n2, n1));
Number n3 = n1.ToAnotherSystem(Bases.Binary);
Number n4 = n2.ToAnotherSystem(Bases.Binary);
string s = sub.ToAnotherSystem(Bases.Binary).ToString();
Assert.AreEqual(n3.SubFromCurrent(n4).ToAnotherSystem(Bases.Binary).ToString(), s);
s = sub2.ToAnotherSystem(Bases.Binary).ToString();
Assert.AreEqual(n4.SubFromCurrent(n3).ToAnotherSystem(Bases.Binary).ToString(), s);
}
public void TestSubDec()
{
int expected = 1;
DecimalNumber DN1 = new DecimalNumber("5");
DecimalNumber DN2 = new DecimalNumber("4");
string correct = DN1.SubFromCurrent(DN2).ToString();
Assert.AreEqual(expected.ToString(), correct, "Minus 2 decimal are correctly");
}