public void GivenBigNumberShouldReturnListAndMatchWithSpecifiedNumbers()
{
//arrange
int number = int.MaxValue - 1;
var expectedDivisor = new List <int> {
1, 2, 3, 6, 7, 9, 11, 14,
18, 21, 22, 31, 33, 42, 62, 63, 66, 77, 93, 99, 126, 151, 154, 186, 198, 217, 231,
279, 302, 331, 341, 434, 453, 462, 558, 651, 662, 682, 693, 906, 993, 1023, 1057, 1302,
1359, 1386, 1661, 1953, 1986, 2046, 2114, 2317, 2387, 2718, 2979, 3069, 3171, 3322, 3641,
3906, 4634, 4681, 4774, 4983, 5958, 6138, 6342, 6951, 7161, 7282, 9362, 9513, 9966, 10261,
10923, 11627, 13902, 14043, 14322, 14949, 19026, 20522, 20853, 21483, 21846, 23254, 25487,
28086, 29898, 30783, 32767, 32769, 34881, 41706, 42129, 42966, 49981, 50974, 51491, 61566,
65534, 65538, 69762, 71827, 76461, 84258, 92349, 98301, 99962, 102982, 104643, 112871, 143654,
149943, 152922, 154473, 184698, 196602, 209286, 215481, 225742, 229383, 294903, 299886, 308946,
338613, 349867, 360437, 430962, 449829, 458766, 463419, 549791, 589806, 646443, 677226, 699734,
720874, 790097, 899658, 926838, 1015839, 1049601, 1081311, 1099582, 1292886, 1549411, 1580194,
1649373, 2031678, 2099202, 2162622, 2370291, 3098822, 3148803, 3243933, 3298746, 3848537, 4648233,
4740582, 4948119, 6297606, 6487866, 7110873, 7697074, 9296466, 9896238, 10845877, 11545611, 13944699, 14221746,
17043521, 21691754, 23091222, 27889398, 32537631, 34087042, 34636833, 51130563, 65075262, 69273666,
97612893, 102261126, 119304647, 153391689, 195225786, 238609294, 306783378, 357913941, 715827882, 1073741823, 2147483646
};
//act
var actualDivisor = AwesomeMath.GetDivisorsFromPositiveNumber(number);
//assert
Assert.Equal(expectedDivisor, actualDivisor);
}
public Task <DivisorCaluculationDTO> GetAllDivisorsAndPrimeNumber(int number)
{
var divisors = AwesomeMath.GetDivisorsFromPositiveNumber(number);
var primes = divisors.Where(AwesomeMath.IsPrime);
return(Task.FromResult(new DivisorCaluculationDTO {
Number = number, Divisors = divisors, Primes = primes
}));
}
public void GivenBigNumberShouldReturnListWithNumbers()
{
//arrange
int number = int.MaxValue - 1;
//act
var actualDivisor = AwesomeMath.GetDivisorsFromPositiveNumber(number);
//assert
Assert.Equal(192, actualDivisor.Count());
}
public void GivenSmallNumberShouldReturnListWithNumbers()
{
//arrange
int number = 40;
//act
var actualDivisor = AwesomeMath.GetDivisorsFromPositiveNumber(number);
//assert
Assert.Equal(8, actualDivisor.Count());
}
public void CheckIfKnowPrimeIsPrime()
{
//arrange
var number = 43;
//act
var isPrime = AwesomeMath.IsPrime(number);
//assert
Assert.True(isPrime);
}
public void GivenSmallNegativeNumberShouldTrowAnException()
{
//arrange
int number = -40;
//act
var exception = Assert.ThrowsAny <Exception>(() => AwesomeMath.GetDivisorsFromPositiveNumber(number));
//assert
Assert.IsType <ArgumentOutOfRangeException>(exception);
}
public void GivenSmallNumerShouldReturnListAndMatchWithSpecifiedNumbers()
{
//arrange
int number = 40;
var expectedDivisor = new List <int> {
1, 2, 4, 5, 8, 10, 20, 40
};
//act
var actualDivisor = AwesomeMath.GetDivisorsFromPositiveNumber(number);
//assert
Assert.Equal(expectedDivisor, actualDivisor);
}
public void GivenBigNumberShouldRunWithinOneSecond()
{
//arrange
int number = int.MaxValue - 1;
var timer = new Stopwatch();
//act
timer.Start();
var actualDivisor = AwesomeMath.GetDivisorsFromPositiveNumber(number);
timer.Stop();
//assert
Assert.True(timer.ElapsedMilliseconds <= 10);
}