public List <PairOfSquares> FindSquaresWhereDifferenceIs(int n)
{
var pairsOfSquares = new List <PairOfSquares> {
};
var factors = factorization.GetFactors(n);
var factorsThatAreValidForDifferenceBetweenSquares = factors.Where(f => f.LargerFactor % 2 == f.SmallerFactor % 2);
return(factorsThatAreValidForDifferenceBetweenSquares.Select(f => this.GetPairOfSquaresWithCriteria(f.LargerFactor, f.SmallerFactor)).ToList());
}
public void TestGetFactors(int n)
{
var factorization = new Factorization();
var factors = factorization.GetFactors(n).OrderBy(n => n.SmallerFactor).ToArray();
var expectedFactors = expectedFactorPairs[n].OrderBy(n => n.SmallerFactor).ToArray();
Assert.AreEqual(expectedFactors.Length, factors.Length);
for (int i = 0; i < factors.Length; i++)
{
Assert.AreEqual(expectedFactors[i].SmallerFactor, factors[i].SmallerFactor);
Assert.AreEqual(expectedFactors[i].LargerFactor, factors[i].LargerFactor);
}
}
