public void TestInvalid()
{
IGetSquareRoot sq = null;
List <double> roots;
var res = sq.GetSquareRoot(0d, 0d, 0d, out roots);
Assert.AreEqual(SquareRootResultEnum.InvalidCoef, res);
Assert.IsTrue(roots.Count == 0);
}
public void TestNoRoots()
{
IGetSquareRoot sq = null;
List <double> roots;
var res = sq.GetSquareRoot(1d, 1d, 1d, out roots);
Assert.AreEqual(SquareRootResultEnum.NoRoots, res);
Assert.IsTrue(roots.Count == 0);
}
public void TestOneRoot()
{
IGetSquareRoot sq = null;
List <double> roots;
var res = sq.GetSquareRoot(1d, -4d, 4d, out roots);
Assert.AreEqual(SquareRootResultEnum.OneRoot, res);
Assert.IsTrue(roots.Count == 1);
Assert.IsTrue(CloseEnough(roots.First(), 2d, Double.Epsilon));
}
public void TestTwoRoots()
{
IGetSquareRoot sq = null;
List <double> roots;
var res = sq.GetSquareRoot(1d, -2d, -3d, out roots);
Assert.AreEqual(SquareRootResultEnum.TwoRoots, res);
Assert.IsTrue(roots.Count == 2);
Assert.IsTrue(CloseEnough(roots.First(), -1d, Double.Epsilon));
Assert.IsTrue(CloseEnough(roots[1], 3d, Double.Epsilon));
}