require 'minitest/autorun'
require_relative 'maybe'

class MaybeTest < MiniTest::Unit::TestCase
  def test_nil
    assert_equal Maybe(nil).a.b.c, Maybe(Nothing.new)
  end

  def test_some
    assert_equal Maybe("Some").downcase, Maybe("some")
  end

  def test_value_with_nil
    assert_equal Maybe(nil).a.value("foo"), "foo"
  end

  def test_value_with_some
    assert_equal Maybe("Some").downcase.value("nothing"), "some"
  end

  def test_else_with_nil
    assert_equal Maybe(nil).else("foo"), "foo"
  end

  def test_else_with_some
    assert_equal Maybe("Foo").else("bar"), Maybe("Foo")
  end
end