# frozen_string_literal: false
require 'test/unit'

class TestRubyVM < Test::Unit::TestCase
  def test_stat
    assert_kind_of Hash, RubyVM.stat
    assert_kind_of Integer, RubyVM.stat[:global_constant_state]

    RubyVM.stat(stat = {})
    assert_not_empty stat
    assert_equal stat[:global_constant_state], RubyVM.stat(:global_constant_state)
  end

  def test_stat_unknown
    assert_raise(ArgumentError){ RubyVM.stat(:unknown) }
    assert_raise_with_message(ArgumentError, /\u{30eb 30d3 30fc}/) {RubyVM.stat(:"\u{30eb 30d3 30fc}")}
  end

  def parse_and_compile
    script = <<~RUBY
      _a = 1
      def foo
        _b = 2
      end
      1.times{
        _c = 3
      }
    RUBY

    ast = RubyVM::AbstractSyntaxTree.parse(script)
    iseq = RubyVM::InstructionSequence.compile(script)

    [ast, iseq]
  end

  def test_keep_script_lines
    prev_conf = RubyVM.keep_script_lines

    # keep
    RubyVM.keep_script_lines = true

    ast, iseq = *parse_and_compile

    lines = ast.script_lines
    assert_equal Array, lines.class

    lines = iseq.script_lines
    assert_equal Array, lines.class
    iseq.each_child{|child|
      assert_equal lines, child.script_lines
    }
    assert lines.frozen?

    # don't keep
    RubyVM.keep_script_lines = false

    ast, iseq = *parse_and_compile

    lines = ast.script_lines
    assert_equal nil, lines

    lines = iseq.script_lines
    assert_equal nil, lines
    iseq.each_child{|child|
      assert_equal lines, child.script_lines
    }

  ensure
    RubyVM.keep_script_lines = prev_conf
  end
end