public void PositiveTestRealStrategy()
{
var strategy = new RealDiscriminantStrategy();
var solver = new QuadraticEquationSolver(strategy);
var results = solver.Solve(1, 10, 16);
Assert.That(results.Item1, Is.EqualTo(new Complex(-2, 0)));
Assert.That(results.Item2, Is.EqualTo(new Complex(-8, 0)));
}
public void NegativeTestRealStrategy()
{
var strategy = new RealDiscriminantStrategy();
var solver = new QuadraticEquationSolver(strategy);
var results = solver.Solve(1, 4, 5);
var complexNaN = new Complex(double.NaN, double.NaN);
Assert.That(results.Item1, Is.EqualTo(complexNaN));
Assert.That(results.Item2, Is.EqualTo(complexNaN));
Assert.IsTrue(double.IsNaN(results.Item1.Real));
Assert.IsTrue(double.IsNaN(results.Item1.Imaginary));
Assert.IsTrue(double.IsNaN(results.Item2.Real));
Assert.IsTrue(double.IsNaN(results.Item2.Imaginary));
}