public void Y2021_Day14_Expand_Returns_Correct_Value(int steps, long expected)
{
// Arrange
string[] instructions =
{
"NNCB",
string.Empty,
"CH -> B",
"HH -> N",
"CB -> H",
"NH -> C",
"HB -> C",
"HC -> B",
"HN -> C",
"NN -> C",
"BH -> H",
"NC -> B",
"NB -> B",
"BN -> B",
"BB -> N",
"BC -> B",
"CC -> N",
"CN -> C",
};
// Act
long actual = Day14.Expand(instructions, steps);
// Assert
actual.ShouldBe(expected);
}