defmodule BottomTest do
  use ExUnit.Case
  import Tetris.Bottom


  test "Various Collisions" do
    bottom = %{{1,1} => {1,1, :blue}}

    assert collides? bottom, {1,1}
    refute collides? bottom, {1,2}
    assert collides? bottom, {1,1, :red}
    assert collides? bottom, {1,1, :blue}
    refute collides? bottom, {1,2, :red}

    assert collides? bottom, [{1,2, :red}, {1,1, :red}]
    refute collides? bottom, [{3,2, :blue}, {4,4, :red}]
  end

  test "test simple merge with bottom" do
    bottom = %{{1,1} => {1,1, :blue}}
    actual = merge bottom, [{1,2, :red}, {1,3, :red}]
    expected = %{
      {1,1} => {1, 1, :blue},
      {1,2} => {1, 2, :red},
      {1,3} => {1, 3, :red}
    }
    assert actual == expected
  end
end