public void ShouldGetAllPotsWithPlantsAfter20YearsFromSimpleExample()
{
var input = "#..#.#..##......###...###";
var growthRules = new List <string>
{
"...## => #",
"..#.. => #",
".#... => #",
".#.#. => #",
".#.## => #",
".##.. => #",
".#### => #",
"#.#.# => #",
"#.### => #",
"##.#. => #",
"##.## => #",
"###.. => #",
"###.# => #",
"####. => #"
};
var sut = new PotTunnel(input, growthRules);
sut.GetPotString(-3, 35).Should().Be("...#..#.#..##......###...###...........");
sut.GrowNextGeneration();
sut.GetPotString(-3, 35).Should().Be("...#...#....#.....#..#..#..#...........");
sut.GrowUntilGeneration(13);
sut.GetPotString(-3, 35).Should().Be("..#..###.#....#.#...#....#...#...#.....");
sut.GrowUntilGeneration(20);
sut.GetSumOfAllPotNumbersThatCountainPlantsInCurrentGeneration().Should().Be(325);
}
public void CheckForSumChangesYearByYear()
{
var input = "#.#.#...#..##..###.##.#...#.##.#....#..#.#....##.#.##...###.#...#######.....##.###.####.#....#.#..##";
var growthRules = new List <string>
{
"#...# => #",
"....# => .",
"##..# => #",
".#.## => #",
"##.## => .",
"###.# => #",
"..... => .",
"...#. => .",
".#.#. => #",
"#.##. => #",
"..#.# => #",
".#... => #",
"#.#.. => .",
"##.#. => .",
".##.. => #",
"#..#. => .",
".###. => .",
"..#.. => .",
"#.### => .",
"..##. => .",
".#..# => #",
".##.# => .",
".#### => .",
"...## => #",
"#.#.# => #",
"..### => .",
"#..## => .",
"####. => #",
"##### => .",
"###.. => #",
"##... => #",
"#.... => ."
};
var sut = new PotTunnel(input, growthRules);
var previousSum = sut.GetSumOfAllPotNumbersThatCountainPlantsInCurrentGeneration();
var sumChangesByYear = new List <int>();
for (int i = 0; i < 500; i++)
{
sut.GrowNextGeneration();
var newSum = sut.GetSumOfAllPotNumbersThatCountainPlantsInCurrentGeneration();
sumChangesByYear.Add(newSum - previousSum);
previousSum = newSum;
}
//after 101 years, looking at this list shows that each year after the sum just increases the sum by 59
sumChangesByYear[100].Should().NotBe(59);
sumChangesByYear[101].Should().Be(59);
sumChangesByYear[102].Should().Be(59);
sumChangesByYear[103].Should().Be(59);
}