public void Step_Works_Correctly(string dataBefore, string dataAfter)
{
var cellsBefore = Parser.Parse(dataBefore);
var cellsAfter = Parser.Parse(dataAfter);
var(cells, changed) = Model2.Step(cellsBefore);
Assert.That(changed, Is.True);
Assert.That(cells, Is.EquivalentTo(cellsAfter));
}