public void DivModTest()
{
SignedBigInteger a, b, c, d;
a = new SignedBigInteger(8);
b = new SignedBigInteger(3);
c = a / b;
d = a % b;
Assert.AreEqual(false, c.Negative);
Assert.AreEqual(new BigInteger(2), c.Number);
Assert.AreEqual(false, d.Negative);
Assert.AreEqual(new BigInteger(2), d.Number);
a = new SignedBigInteger(-22);
b = new SignedBigInteger(7);
c = a / b;
d = a % b;
Assert.AreEqual(true, c.Negative);
Assert.AreEqual(new BigInteger(3), c.Number);
Assert.AreEqual(new BigInteger(1), d.Number);
Assert.AreEqual(false, d.Negative);
a = new SignedBigInteger(-8);
b = new SignedBigInteger(-3);
c = a / b;
Assert.AreEqual(false, c.Negative);
Assert.AreEqual(new BigInteger(2), c.Number);
}
public void AddTest()
{
SignedBigInteger a, b, c;
a = new SignedBigInteger(-3);
b = new SignedBigInteger(6);
c = a + b;
Assert.AreEqual(false, c.Negative);
Assert.AreEqual(new BigInteger(3), c.Number);
//test for commutativity in addition
Assert.AreEqual(c, b + a);
a = new SignedBigInteger(-21);
b = new SignedBigInteger(7);
c = a + b;
Assert.AreEqual(true, c.Negative);
Assert.AreEqual(new BigInteger(14), c.Number);
Assert.AreEqual(c, b + a);
a = new SignedBigInteger(-1239480123908);
b = new SignedBigInteger(-1238485585748);
c = a + b;
Assert.AreEqual(true, c.Negative);
Assert.AreEqual(new BigInteger(2477965709656), c.Number);
Assert.AreEqual(c, b + a);
}
public void InitialiseTest()
{
SignedBigInteger a = new SignedBigInteger(-3);
Assert.AreEqual(true, a.Negative);
Assert.AreEqual(new BigInteger(3), a.Number);
a = new SignedBigInteger(324812348123433218);
Assert.AreEqual(new BigInteger(324812348123433218), a.Number);
Assert.AreEqual(false, a.Negative);
a = new SignedBigInteger(new BigInteger(213412341324), true);
Assert.AreEqual(true, a.Negative);
Assert.AreEqual(new BigInteger(213412341324), a.Number);
}
public void SubtractTest()
{
SignedBigInteger a, b, c;
a = new SignedBigInteger(145);
b = new SignedBigInteger(13);
c = a - b;
Assert.AreEqual(false, c.Negative);
Assert.AreEqual(new BigInteger(132), c.Number);
Assert.AreNotEqual(c, b - a);
a = new SignedBigInteger(-12);
b = new SignedBigInteger(13);
c = a - b;
Assert.AreEqual(true, c.Negative);
Assert.AreEqual(new BigInteger(25), c.Number);
b = new SignedBigInteger(13);
a = new SignedBigInteger(1);
c = a - b;
Assert.AreEqual(true, c.Negative);
Assert.AreEqual(new BigInteger(12), c.Number);
a = new SignedBigInteger(-13);
b = new SignedBigInteger(-16);
c = a - b;
Assert.AreEqual(false, c.Negative);
Assert.AreEqual(new BigInteger(3), c.Number);
}
public void MultiplyTest()
{
SignedBigInteger a, b, c;
a = new SignedBigInteger(3);
b = new SignedBigInteger(-3);
c = a * b;
Assert.AreEqual(true,c.Negative);
Assert.AreEqual(new BigInteger(9), c.Number);
//test for commutativity in multiplication
Assert.AreEqual(c, b * a);
a = new SignedBigInteger(-3);
b = new SignedBigInteger(-7);
c = a * b;
Assert.AreEqual(false, c.Negative);
Assert.AreEqual(new BigInteger(21), c.Number);
Assert.AreEqual(c, b * a);
a = new SignedBigInteger(-1329048120948);
b = new SignedBigInteger(471723838228);
c = a * b;
Assert.AreEqual(true, c.Negative);
Assert.AreEqual(new BigInteger(471723838228) * new BigInteger(1329048120948), c.Number);
Assert.AreEqual(c, b * a);
}
