public void Puzzle1_CountRemainingUnits_AfterAllCollapseEvents()
{
var polymer = new Polymer(Input.Day05);
var collapsed = polymer.Collapse();
collapsed.Should().HaveLength(9288);
}
public void Puzzle1LargerExample_PolymerCollapsesCorrectly()
{
const string input = "dabAcCaCBAcCcaDA";
const string expected = "dabCBAcaDA";
var polymer = new Polymer(input);
var collapsed = polymer.Collapse();
collapsed.Should().Be(expected);
}