public void GetFactorsAmount_MaxInt_IsPrime() //!!! 2^n-1 sometimes is prime; 2^32-1 indeed !
{
var solver = new CountFactors();
var amount = solver.GetFactorsAmount(int.MaxValue);
_outputHelper.WriteLine($"max int has {amount} divisors");
}
public void GetFactorsAmount_Prime_2(int n)
{
var solver = new CountFactors();
var amount = solver.GetFactorsAmount(n);
amount.Should().Be(2);
}
public void GetFactorsAmount_Composite_Many(int n, int expected)
{
var solver = new CountFactors();
var amount = solver.GetFactorsAmount(n);
amount.Should().Be(expected);
}
public void GetFactorsAmount_Small_1(int n)
{
var solver = new CountFactors();
var amount = solver.GetFactorsAmount(n);
amount.Should().Be(1);
}
public void GetFactorsAmount_BigInt_Many()
{
var bigNumber = 2_147_395_600;
var solver = new CountFactors();
var amount = solver.GetFactorsAmount(bigNumber);
_outputHelper.WriteLine($"{bigNumber} has {amount} divisors");
}