conway_spec.rb

describe Cell do
  it "can be created" do
    expect(Cell.new).to_not eq(nil)
  end

  it "can tick" do
    cell = Cell.new
    expect(cell).to respond_to(:tick!)
  end

  it "has neighbors" do
    cell = Cell.new
    expect(cell).to respond_to(:neighbors)
  end

  it "knows if it is alive" do
    cell = Cell.new
    expect(cell).to respond_to(:alive?)
  end

  it "dies if it has less than two neighbors" do
    cell = Cell.new neighbors: 1
    cell.tick!
    expect(cell.alive?).to be_falsey
  end
end