public void FindMostPopularYear_Stress_TwoSolutionsMatch()
{
const int size = 1_000_000_000, minLifeExpectancy = 20, maxLifeExpectancy = 110;
var generator = new Random(DateTime.UtcNow.Millisecond);
var lifetimes = Enumerable.Range(1, size).Select(n =>
{
var birth = generator.Next(1750, 2150);
var death = generator.Next(minLifeExpectancy, maxLifeExpectancy) + birth;
return(birth, death);
}).ToArray();
var sw = Stopwatch.StartNew();
var f = BirthDayPopulation.FindMostPopulatedYear(lifetimes);
sw.Stop();
_output.WriteLine($"via frequency table result is {f} and time is {sw.ElapsedMilliseconds} ms");
sw = Stopwatch.StartNew();
var s = BirthDayPopulation.FindMostPopulatedYear_Sorted(lifetimes);
sw.Stop();
_output.WriteLine($"via action tracking result is {s} and time is {sw.ElapsedMilliseconds} ms");
f.Should().Be(s);
}
public void FindMostPopulatedYear_Sample_2000()
{
var lifetimes = Enumerable.Range(1, 50).Select(n => (1950 + n, 2000 + n)).ToArray();
BirthDayPopulation.FindMostPopulatedYear(lifetimes).Should().Be((2000, 50));
}