# frozen_string_literal: true

require_relative "test_helper"

return if RUBY_ENGINE != "ruby"

module Prism
  class MagicCommentTest < TestCase
    examples = [
      "# encoding: ascii",
      "# coding: ascii",
      "# eNcOdInG: ascii",
      "# CoDiNg: ascii",
      "# \s\t\v encoding \s\t\v : \s\t\v ascii \s\t\v",
      "# -*- encoding: ascii -*-",
      "# -*- coding: ascii -*-",
      "# -*- eNcOdInG: ascii -*-",
      "# -*- CoDiNg: ascii -*-",
      "# -*- \s\t\v encoding \s\t\v : \s\t\v ascii \s\t\v -*-",
      "# -*- foo: bar; encoding: ascii -*-",
      "# coding \t \r  \v   :     \t \v    \r   ascii-8bit",
      "# vim: filetype=ruby, fileencoding=windows-31j, tabsize=3, shiftwidth=3"
    ]

    examples.each.with_index(1) do |example, index|
      define_method(:"test_magic_comment_#{index}") do
        expected = RubyVM::InstructionSequence.compile(%Q{#{example}\n""}).eval.encoding
        actual = Prism.parse(example).encoding
        assert_equal expected, actual
      end
    end
  end
end