require "test_helper"

describe "range" do
  def setup
    reset_order
  end

  it "runs without range" do
    Order.add_to_flags :a
    Order.add_to_flags :b
  end

  it "runs with range(inside)" do
    Order.add_to_flags range: 2..4, a: 2
    Order.add_to_flags range: 2..4, b: 3
  end

  it "fails with outside range" do
    assert_raises(RangeError) { Order.add_to_flags range: 2..3, a: 1 }
    assert_raises(RangeError) { Order.add_to_flags range: 2..3, b: 4 }
  end

  it "runs at borders" do
    Order.add_to_flags range: 2..3, a: 2
    Order.add_to_flags range: 2..3, b: 3
  end

  it "runs with ... as range" do
    Order.add_to_flags range: 2...3, a: 2
    assert_raises(RangeError) { Order.add_to_flags range: 2...3, b: 3 }
  end

  it "detects wrong range" do
    assert_raises(RangeError) { Order.add_to_flags range: "a".."z", a: 2 }
  end

  it "tests range 0..0 no position" do
    Order.add_to_flags :a, range: 0..0
    assert_raises(RangeError) { Order.add_to_flags :b, range: 0..0 }
  end

  it "tests range ..0 no position" do
    Order.add_to_flags :a, range: ..0
    assert_raises(RangeError) { Order.add_to_flags :b, range: ..0 }
  end

  it "tests range ...0 no position" do
    assert_raises(RangeError) { Order.add_to_flags :a, range: ...0 }
  end

  # YAGNI
  # # includes range: ( .. 3 ) equivalent to range: ..3
  # n = 100
  # (0..n).each do |i|
  #   rng = ..i
  #
  #   (0..i).each do |j|
  #     it "tests range ..#{i} with position #{j}" do
  #       Order.add_to_flags a: j, range: rng
  #     end
  #   end
  #
  #   it "fails range ..#{i} with position overflow" do
  #     assert_raises(RangeError) { Order.add_to_flags b: (i + 1), range: rng }
  #   end
  # end
  #
  # it "runs ii plus" do
  #   ii = 0
  #   (0..2).each { |íí|
  #     sym = "x#{ii}".to_sym
  #     j = f(ii, ii + 1) # filler
  #     rand j
  #     Order.add_to_flags :range => ii..f(íí, íí), sym => (ii += 1)
  #     orden = Order.new
  #     refute orden.send("#{sym}?") # checks that accessor is active
  #     orden.x0 = true # checks that first accessor is still there
  #     assert orden.x0?
  #   }
  # end
  #
  # private
  #
  # def f(x, y)
  #   return y + 1 if x == 0
  #   return f(x - 1, 1) if y == 0
  #   f(x - 1, f(x, y - 1))
  # end
end