defmodule Atoms do
  use Koans

  @intro "Atoms"

  koan "Atoms are constants where their name is their own value" do
    adam = :human
    assert adam == ___
  end

  koan "It is surprising to find out that booleans are atoms" do
    assert is_atom(true) == ___
    assert is_boolean(false) == ___
    assert :true == ___
    assert :false == ___
  end

  koan "Like booleans, the nil value is also an atom" do
    assert is_atom(nil) == ___
    assert :nil == ___
  end
end