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path: root/test/ripper/test_parser_events.rb
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# frozen_string_literal: true
begin
  require_relative 'dummyparser'
  require 'test/unit'
  ripper_test = true
  module TestRipper; end
rescue LoadError
end

class TestRipper::ParserEvents < Test::Unit::TestCase

  def test_event_coverage
    dispatched = Ripper::PARSER_EVENTS
    tested = self.class.instance_methods(false).grep(/\Atest_(\w+)/) {$1.intern}
    assert_empty dispatched-tested
  end

  def parse(str, nm = nil, &bl)
    dp = DummyParser.new(str)
    dp.hook(*nm, &bl) if nm
    dp.parse.to_s
  end

  def compile_error(str)
    parse(str, :compile_error) {|e, msg| return msg}
  end

  def warning(str)
    tree = parse(str, :warning) {|e, *args| return args}
    if block_given?
      yield tree
    else
      assert(false, "warning expected")
    end
  end

  def warn(str)
    tree = parse(str, :warn) {|e, *args| return args}
    if block_given?
      yield tree
    else
      assert(false, "warning expected")
    end
  end

  def test_program
    thru_program = false
    assert_equal '[void()]', parse('', :on_program) {thru_program = true}
    assert_equal true, thru_program
  end

  def test_stmts_new
    assert_equal '[void()]', parse('')
  end

  def test_stmts_add
    assert_equal '[ref(nil)]', parse('nil')
    assert_equal '[ref(nil),ref(nil)]', parse('nil;nil')
    assert_equal '[ref(nil),ref(nil),ref(nil)]', parse('nil;nil;nil')
  end

  def test_void_stmt
    assert_equal '[void()]', parse('')
    assert_equal '[void()]', parse('; ;')
  end

  def test_var_ref
    assert_equal '[assign(var_field(a),ref(a))]', parse('a=a')
    assert_equal '[ref(nil)]', parse('nil')
    assert_equal '[ref(true)]', parse('true')
    assert_equal '[vcall(_0)]', parse('_0')
    assert_equal '[vcall(_1)]', parse('_1')
    assert_include parse('proc{_1}'), '[ref(_1)]'
  end

  def test_vcall
    assert_equal '[vcall(a)]', parse('a')
  end

  def test_BEGIN
    assert_equal '[BEGIN([void()])]', parse('BEGIN{}')
    assert_equal '[BEGIN([ref(nil)])]', parse('BEGIN{nil}')
  end

  def test_END
    assert_equal '[END([void()])]', parse('END{}')
    assert_equal '[END([ref(nil)])]', parse('END{nil}')
  end

  def test_alias
    assert_equal '[alias(symbol_literal(a),symbol_literal(b))]', parse('alias a b')
  end

  def test_var_alias
    assert_equal '[valias($a,$g)]', parse('alias $a $g')
  end

  def test_alias_error
    assert_equal '[aliaserr($1)]', parse('alias $a $1')
  end

  def test_arglist
    assert_equal '[fcall(m,[])]', parse('m()')
    assert_equal '[fcall(m,[1])]', parse('m(1)')
    assert_equal '[fcall(m,[1,2])]', parse('m(1,2)')
    assert_equal '[fcall(m,[*vcall(r)])]', parse('m(*r)')
    assert_equal '[fcall(m,[1,*vcall(r)])]', parse('m(1,*r)')
    assert_equal '[fcall(m,[1,2,*vcall(r)])]', parse('m(1,2,*r)')
    assert_equal '[fcall(m,[&vcall(r)])]', parse('m(&r)')
    assert_equal '[fcall(m,[1,&vcall(r)])]', parse('m(1,&r)')
    assert_equal '[fcall(m,[1,2,&vcall(r)])]', parse('m(1,2,&r)')
    assert_equal '[fcall(m,[*vcall(a),&vcall(b)])]', parse('m(*a,&b)')
    assert_equal '[fcall(m,[1,*vcall(a),&vcall(b)])]', parse('m(1,*a,&b)')
    assert_equal '[fcall(m,[1,2,*vcall(a),&vcall(b)])]', parse('m(1,2,*a,&b)')
  end

  def test_args_add
    thru_args_add = false
    parse('m(a)', :on_args_add) {thru_args_add = true}
    assert_equal true, thru_args_add
  end

  def test_args_add_block
    thru_args_add_block = false
    parse('m(&b)', :on_args_add_block) {thru_args_add_block = true}
    assert_equal true, thru_args_add_block
  end

  def test_args_add_star
    thru_args_add_star = false
    parse('m(*a)', :on_args_add_star) {thru_args_add_star = true}
    assert_equal true, thru_args_add_star
    thru_args_add_star = false
    parse('m(*a, &b)', :on_args_add_star) {thru_args_add_star = true}
    assert_equal true, thru_args_add_star
  end

  def test_args_new
    thru_args_new = false
    parse('m()', :on_args_new) {thru_args_new = true}
    assert_equal true, thru_args_new
  end

  def test_args_forward
    [
      'def m(...) n(...) end',
      'def m(...) end',
      'def m(a, ...) n(1, ...) end',
      'def m(...) n(1, ...) end',
      'def m(a, ...) n(...) end'
    ].each do |code|
      thru_args_forward = false
      parse(code, :on_args_forward) {thru_args_forward = true}
      assert_equal true, thru_args_forward, "no args_forward for: #{code}"
    end
  end

  def test_arg_paren
    # FIXME
  end

  def test_aref
    assert_equal '[aref(vcall(v),[1])]', parse('v[1]')
    assert_equal '[aref(vcall(v),[1,2])]', parse('v[1,2]')
  end

  def test_assoclist_from_args
    thru_assoclist_from_args = false
    parse('{a=>b}', :on_assoclist_from_args) {thru_assoclist_from_args = true}
    assert_equal true, thru_assoclist_from_args
  end

  def test_assocs
    assert_equal '[fcall(m,[assocs(assoc(1,2))])]', parse('m(1=>2)')
    assert_equal '[fcall(m,[assocs(assoc(1,2),assoc(3,4))])]', parse('m(1=>2,3=>4)')
    assert_equal '[fcall(m,[3,assocs(assoc(1,2))])]', parse('m(3,1=>2)')
  end

  def test_assoc_new
    thru_assoc_new = false
    parse('{a=>b}', :on_assoc_new) {thru_assoc_new = true}
    assert_equal true, thru_assoc_new
  end

  def test_assoc_splat
    thru_assoc_splat = false
    parse('m(**h)', :on_assoc_splat) {thru_assoc_splat = true}
    assert_equal true, thru_assoc_splat
  end

  def test_aref_field
    assert_equal '[assign(aref_field(vcall(a),[1]),2)]', parse('a[1]=2')
  end

  def test_arg_ambiguous
    thru_arg_ambiguous = false
    parse('m //', :on_arg_ambiguous) {thru_arg_ambiguous = true}
    assert_equal true, thru_arg_ambiguous
  end

  def test_operator_ambiguous
    thru_operator_ambiguous = false
    token = syntax = nil
    parse('a=1; a %[]', :on_operator_ambiguous) {|*a|
      thru_operator_ambiguous = true
      _, token, syntax = *a
    }
    assert_equal true, thru_operator_ambiguous
    assert_equal :%, token
    assert_equal "string literal", syntax
  end

  def test_array   # array literal
    assert_equal '[array([1,2,3])]', parse('[1,2,3]')
    assert_equal '[array([abc,def])]', parse('%w[abc def]')
    assert_equal '[array([abc,def])]', parse('%W[abc def]')
  end

  def test_assign   # generic assignment
    assert_equal '[assign(var_field(v),1)]', parse('v=1')
  end

  def test_assign_error
    thru_assign_error = false
    result = parse('self = 1', :on_assign_error) {thru_assign_error = true}
    assert_equal true, thru_assign_error
    assert_equal '[assign(assign_error(var_field(self)),1)]', result
  end

  def test_assign_error_backref
    thru_assign_error = false
    result =
      parse('$` = 1', :on_assign_error) {thru_assign_error = true}
    assert_equal true, thru_assign_error
    assert_equal '[assign(assign_error(var_field($`)),1)]', result

    thru_assign_error = false
    result =
      parse('$`, _ = 1', :on_assign_error) {thru_assign_error = true}
    assert_equal true, thru_assign_error
    assert_equal '[massign([assign_error(var_field($`)),var_field(_)],1)]', result
  end

  def test_assign_error_const_qualified
    thru_assign_error = false
    result =
      parse('self::X = 1', :on_assign_error) {thru_assign_error = true}
    assert_equal false, thru_assign_error
    assert_equal "[assign(const_path_field(ref(self),X),1)]", result

    thru_assign_error = false
    result =
      parse("def m\n self::X = 1\nend", :on_assign_error) {thru_assign_error = true}
    assert_equal true, thru_assign_error
    assert_include result, "assign_error(const_path_field(ref(self),X))"

    thru_assign_error = false
    result =
      parse("def m\n self::X, a = 1, 2\nend", :on_assign_error) {thru_assign_error = true}
    assert_equal true, thru_assign_error
    assert_include result, "assign_error(const_path_field(ref(self),X))"
  end

  def test_assign_error_const
    thru_assign_error = false
    result = parse('X = 1', :on_assign_error) {thru_assign_error = true}
    assert_equal false, thru_assign_error
    assert_equal "[assign(var_field(X),1)]", result

    thru_assign_error = false
    result = parse('X, a = 1, 2', :on_assign_error) {thru_assign_error = true}
    assert_equal false, thru_assign_error
    assert_include result, "massign([var_field(X),var_field(a)],"

    result = parse("def m\n X = 1\nend", :on_assign_error) {thru_assign_error = true}
    assert_equal true, thru_assign_error
    assert_include result, "assign_error(var_field(X))"
    thru_assign_error = false
    result = parse("def m\n X, a = 1, 2\nend", :on_assign_error) {thru_assign_error = true}
    assert_equal true, thru_assign_error
    assert_include result, "assign_error(var_field(X))"
  end

  def test_assign_error_const_toplevel
    thru_assign_error = false
    parse('::X = 1', :on_assign_error) {thru_assign_error = true}
    assert_equal false, thru_assign_error
    parse("def m\n ::X = 1\nend", :on_assign_error) {thru_assign_error = true}
    assert_equal true, thru_assign_error
    thru_assign_error = false
    parse("def m\n ::X, a = 1, 2\nend", :on_assign_error) {thru_assign_error = true}
    assert_equal true, thru_assign_error
  end

  def test_bare_assoc_hash
    thru_bare_assoc_hash = false
    parse('x[a=>b]', :on_bare_assoc_hash) {thru_bare_assoc_hash = true}
    assert_equal true, thru_bare_assoc_hash
    thru_bare_assoc_hash = false
    parse('x[1, a=>b]', :on_bare_assoc_hash) {thru_bare_assoc_hash = true}
    assert_equal true, thru_bare_assoc_hash
    thru_bare_assoc_hash = false
    parse('x(a=>b)', :on_bare_assoc_hash) {thru_bare_assoc_hash = true}
    assert_equal true, thru_bare_assoc_hash
    thru_bare_assoc_hash = false
    parse('x(1, a=>b)', :on_bare_assoc_hash) {thru_bare_assoc_hash = true}
    assert_equal true, thru_bare_assoc_hash
  end

  def test_begin
    thru_begin = false
    parse('begin end', :on_begin) {thru_begin = true}
    assert_equal true, thru_begin
  end

  %w"and or + - * / % ** | ^ & <=> > >= < <= == === != =~ !~ << >> && ||".each do |op|
    define_method("test_binary(#{op})") do
      thru_binary = false
      parse("a #{op} b", :on_binary) {thru_binary = true}
      assert_equal true, thru_binary
    end
  end

  def test_blockarg
    thru_blockarg = false
    parse("def a(&b) end", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg
    thru_blockarg = false
    parse("def a(x, &b) end", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg

    thru_blockarg = false
    parse("proc{|&b|}", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg
    thru_blockarg = false
    parse("proc{|x, &b|}", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg
    thru_blockarg = false
    parse("proc{|&b;y|}", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg
    thru_blockarg = false
    parse("proc{|&b,x;y|}", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg

    thru_blockarg = false
    parse("proc do |&b| end", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg
    thru_blockarg = false
    parse("proc do |&b, x| end", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg
    thru_blockarg = false
    parse("proc do |&b;y| end", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg
    thru_blockarg = false
    parse("proc do |&b, x;y| end", :on_blockarg) {thru_blockarg = true}
    assert_equal true, thru_blockarg
  end

  def test_block_var
    thru_block_var = false
    parse("proc{||}", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var
    thru_block_var = false
    parse("proc{| |}", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var
    thru_block_var = false
    parse("proc{|x|}", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var
    thru_block_var = false
    parse("proc{|;y|}", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var
    thru_block_var = false
    parse("proc{|x;y|}", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var

    thru_block_var = false
    parse("proc do || end", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var
    thru_block_var = false
    parse("proc do | | end", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var
    thru_block_var = false
    parse("proc do |x| end", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var
    thru_block_var = false
    parse("proc do |;y| end", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var
    thru_block_var = false
    parse("proc do |x;y| end", :on_block_var) {thru_block_var = true}
    assert_equal true, thru_block_var
  end

  def test_block_var_add_block
    # not used
  end

  def test_block_var_add_star
    # not used
  end

  def test_bodystmt
    thru_bodystmt = false
    parse("class X\nend", :on_bodystmt) {thru_bodystmt = true}
    assert_equal true, thru_bodystmt
  end

  def test_call
    bug2233 = '[ruby-core:26165]'
    tree = nil

    thru_call = false
    assert_nothing_raised {
      tree = parse("self.foo", :on_call) {thru_call = true}
    }
    assert_equal true, thru_call
    assert_equal "[call(ref(self),.,foo)]", tree

    thru_call = false
    assert_nothing_raised {
      tree = parse("self.foo()", :on_call) {thru_call = true}
    }
    assert_equal true, thru_call
    assert_equal "[call(ref(self),.,foo,[])]", tree

    thru_call = false
    assert_nothing_raised(bug2233) {
      tree = parse("foo.()", :on_call) {thru_call = true}
    }
    assert_equal true, thru_call
    assert_equal "[call(vcall(foo),.,call,[])]", tree

    thru_call = false
    assert_nothing_raised {
      tree = parse("self::foo", :on_call) {thru_call = true}
    }
    assert_equal true, thru_call
    assert_equal "[call(ref(self),::,foo)]", tree

    thru_call = false
    assert_nothing_raised {
      tree = parse("self::foo()", :on_call) {thru_call = true}
    }
    assert_equal true, thru_call
    assert_equal "[call(ref(self),::,foo,[])]", tree

    thru_call = false
    assert_nothing_raised(bug2233) {
      tree = parse("foo::()", :on_call) {thru_call = true}
    }
    assert_equal true, thru_call
    assert_equal "[call(vcall(foo),::,call,[])]", tree

    thru_call = false
    tree = parse("self&.foo", :on_call) {thru_call = true}
    assert_equal true, thru_call
    assert_equal "[call(ref(self),&.,foo)]", tree

    thru_call = false
    tree = parse("self&.foo()", :on_call) {thru_call = true}
    assert_equal true, thru_call
    assert_equal "[call(ref(self),&.,foo,[])]", tree
  end

  def test_excessed_comma
    thru_excessed_comma = false
    parse("proc{|x,|}", :on_excessed_comma) {thru_excessed_comma = true}
    assert_equal true, thru_excessed_comma
    thru_excessed_comma = false
    parse("proc{|x,y,|}", :on_excessed_comma) {thru_excessed_comma = true}
    assert_equal true, thru_excessed_comma

    thru_excessed_comma = false
    parse("proc do |x,| end", :on_excessed_comma) {thru_excessed_comma = true}
    assert_equal true, thru_excessed_comma
    thru_excessed_comma = false
    parse("proc do |x,y,| end", :on_excessed_comma) {thru_excessed_comma = true}
    assert_equal true, thru_excessed_comma
  end

  def test_heredoc
    bug1921 = '[ruby-core:24855]'
    thru_heredoc_beg = false
    tree = parse("<""<EOS\nheredoc\nEOS\n", :on_heredoc_beg) {thru_heredoc_beg = true}
    assert_equal true, thru_heredoc_beg
    assert_match(/string_content\(\),heredoc\n/, tree, bug1921)
    heredoc = nil
    parse("<""<EOS\nheredoc1\nheredoc2\nEOS\n", :on_string_add) {|e, n, s| heredoc = s}
    assert_equal("heredoc1\nheredoc2\n", heredoc, bug1921)
    heredoc = nil
    parse("<""<-EOS\nheredoc1\nheredoc2\n\tEOS\n", :on_string_add) {|e, n, s| heredoc = s}
    assert_equal("heredoc1\nheredoc2\n", heredoc, bug1921)
  end

  def test_heredoc_dedent
    thru_heredoc_dedent = false
    str = width = nil
    tree = parse("<""<~EOS\n heredoc\nEOS\n", :on_heredoc_dedent) {|e, s, w|
      thru_heredoc_dedent = true
      str = s
      width = w
    }
    assert_equal true, thru_heredoc_dedent
    assert_match(/string_content\(\), heredoc\n/, tree)
    assert_equal(" heredoc\n", str.children[1])
    assert_equal(1, width)
  end

  def test_unterminated_heredoc
    assert_match("can't find string \"a\" anywhere before EOF", compile_error("<<a"))
    assert_match("can't find string \"a\" anywhere before EOF", compile_error('<<"a"'))
    assert_match("can't find string \"a\" anywhere before EOF", compile_error("<<'a'"))
    msg = nil
    parse('<<"', :on_parse_error) {|_, e| msg = e}
    assert_equal("unterminated here document identifier", msg)
  end

  def test_massign
    thru_massign = false
    parse("a, b = 1, 2", :on_massign) {thru_massign = true}
    assert_equal true, thru_massign
  end

  def test_mlhs_add
    thru_mlhs_add = false
    parse("a, b = 1, 2", :on_mlhs_add) {thru_mlhs_add = true}
    assert_equal true, thru_mlhs_add
  end

  def test_mlhs_add_star
    bug2232 = '[ruby-core:26163]'
    bug4364 = '[ruby-core:35078]'

    thru_mlhs_add_star = false
    tree = parse("a, *b = 1, 2", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "massign([var_field(a),*var_field(b)]")
    thru_mlhs_add_star = false
    tree = parse("a, *b, c = 1, 2", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "massign([var_field(a),*var_field(b),var_field(c)]", bug2232)
    thru_mlhs_add_star = false
    tree = parse("a, *, c = 1, 2", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "massign([var_field(a),*,var_field(c)]", bug4364)
    thru_mlhs_add_star = false
    tree = parse("*b, c = 1, 2", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "massign([*var_field(b),var_field(c)]", bug4364)
    thru_mlhs_add_star = false
    tree = parse("*, c = 1, 2", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "massign([*,var_field(c)],", bug4364)
  end

  def test_mlhs_add_post
    thru_mlhs_add_post = false
    tree = parse("a, *b = 1, 2", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal false, thru_mlhs_add_post
    assert_include(tree, "massign([var_field(a),*var_field(b)],")
    thru_mlhs_add_post = false
    tree = parse("a, *b, c = 1, 2", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal true, thru_mlhs_add_post
    assert_include(tree, "massign([var_field(a),*var_field(b),var_field(c)],")
    thru_mlhs_add_post = false
    tree = parse("a, *, c = 1, 2", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal true, thru_mlhs_add_post
    assert_include(tree, "massign([var_field(a),*,var_field(c)],")
    thru_mlhs_add_post = false
    tree = parse("*b, c = 1, 2", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal true, thru_mlhs_add_post
    assert_include(tree, "massign([*var_field(b),var_field(c)],")
    thru_mlhs_add_post = false
    tree = parse("*, c = 1, 2", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal true, thru_mlhs_add_post
    assert_include(tree, "massign([*,var_field(c)],")
  end

  def test_mlhs_new
    thru_mlhs_new = false
    parse("a, b = 1, 2", :on_mlhs_new) {thru_mlhs_new = true}
    assert_equal true, thru_mlhs_new
  end

  def test_mlhs_paren
    thru_mlhs_paren = false
    parse("a, b = 1, 2", :on_mlhs_paren) {thru_mlhs_paren = true}
    assert_equal false, thru_mlhs_paren
    thru_mlhs_paren = false
    parse("(a, b) = 1, 2", :on_mlhs_paren) {thru_mlhs_paren = true}
    assert_equal true, thru_mlhs_paren
  end

  def test_brace_block
    thru_brace_block = false
    parse('proc {}', :on_brace_block) {thru_brace_block = true}
    assert_equal true, thru_brace_block
  end

  def test_break
    thru_break = false
    parse('proc {break}', :on_break) {thru_break = true}
    assert_equal true, thru_break
  end

  def test_case
    thru_case = false
    parse('case foo when true; end', :on_case) {thru_case = true}
    assert_equal true, thru_case
  end

  def test_class
    thru_class = false
    parse('class Foo; end', :on_class) {thru_class = true}
    assert_equal true, thru_class
  end

  def test_class_name_error
    thru_class_name_error = false
    parse('class foo; end', :on_class_name_error) {thru_class_name_error = true}
    assert_equal true, thru_class_name_error
  end

  def test_command
    thru_command = false
    parse('foo a b', :on_command) {thru_command = true}
    assert_equal true, thru_command
  end

  def test_command_call
    thru_command_call = false
    parse('foo.bar a, b', :on_command_call) {thru_command_call = true}
    assert_equal true, thru_command_call
  end

  def test_const_ref
    thru_const_ref = false
    parse('class A;end', :on_const_ref) {thru_const_ref = true}
    assert_equal true, thru_const_ref
    thru_const_ref = false
    parse('module A;end', :on_const_ref) {thru_const_ref = true}
    assert_equal true, thru_const_ref
  end

  def test_const_path_field
    thru_const_path_field = false
    parse('foo::X = 1', :on_const_path_field) {thru_const_path_field = true}
    assert_equal true, thru_const_path_field
  end

  def test_const_path_ref
    thru_const_path_ref = false
    parse('foo::X', :on_const_path_ref) {thru_const_path_ref = true}
    assert_equal true, thru_const_path_ref
  end

  def test_def
    thru_def = false
    parse('def foo; end', :on_def) {
      thru_def = true
    }
    assert_equal true, thru_def
    assert_equal '[def(foo,[],bodystmt([void()]))]', parse('def foo ;end')
    assert_equal '[def(foo,[],bodystmt([void()],rescue(,,[void()])))]', parse('def foo ;rescue; end')
    assert_equal '[def(foo,[],bodystmt([void()],,,ensure([void()])))]', parse('def foo ;ensure; end')
  end

  def test_endless_def
    events = %i[on_def on_parse_error]
    thru = nil
    hook = ->(name, *) {thru[name] = true}

    thru = {}
    tree = parse('def foo() = 42', events, &hook)
    assert_equal({on_def: true}, thru)
    assert_equal '[def(foo,[],42)]', tree

    thru = {}
    tree = parse('def foo() = 42 rescue 0', events, &hook)
    assert_equal({on_def: true}, thru)
    assert_equal '[def(foo,[],rescue_mod(42,0))]', tree

    thru = {}
    tree = parse('def foo=() = 42', events, &hook)
    assert_equal({on_def: true, on_parse_error: true}, thru)

    thru = {}
    tree = parse('def foo=() = 42 rescue 0', events, &hook)
    assert_equal({on_def: true, on_parse_error: true}, thru)
  end

  def test_defined
    thru_defined = false
    parse('defined?(x)', :on_defined) {thru_defined = true}
    assert_equal true, thru_defined
  end

  def test_defs
    thru_defs = false
    tree = parse('def foo.bar; end', :on_defs) {thru_defs = true}
    assert_equal true, thru_defs
    assert_equal("[defs(vcall(foo),.,bar,[],bodystmt([void()]))]", tree)

    thru_parse_error = false
    tree = parse('def foo&.bar; end', :on_parse_error) {thru_parse_error = true}
    assert_equal(true, thru_parse_error)
  end

  def test_endless_defs
    events = %i[on_defs on_parse_error]
    thru = nil
    hook = ->(name, *) {thru[name] = true}

    thru = {}
    tree = parse('def foo.bar() = 42', events, &hook)
    assert_equal({on_defs: true}, thru)
    assert_equal '[defs(vcall(foo),.,bar,[],42)]', tree

    thru = {}
    tree = parse('def foo.bar() = 42 rescue 0', events, &hook)
    assert_equal({on_defs: true}, thru)
    assert_equal '[defs(vcall(foo),.,bar,[],rescue_mod(42,0))]', tree

    thru = {}
    tree = parse('def foo.bar=() = 42', events, &hook)
    assert_equal({on_defs: true, on_parse_error: true}, thru)

    thru = {}
    tree = parse('def foo.bar=() = 42 rescue 0', events, &hook)
    assert_equal({on_defs: true, on_parse_error: true}, thru)
  end

  def test_do_block
    thru_do_block = false
    parse('proc do end', :on_do_block) {thru_do_block = true}
    assert_equal true, thru_do_block
  end

  def test_dot2
    thru_dot2 = false
    parse('a..b', :on_dot2) {thru_dot2 = true}
    assert_equal true, thru_dot2
  end

  def test_dot3
    thru_dot3 = false
    parse('a...b', :on_dot3) {thru_dot3 = true}
    assert_equal true, thru_dot3
  end

  def test_dyna_symbol
    thru_dyna_symbol = false
    parse(':"#{foo}"', :on_dyna_symbol) {thru_dyna_symbol = true}
    assert_equal true, thru_dyna_symbol

    thru_dyna_symbol = false
    parse('{"#{foo}": 1}', :on_dyna_symbol) {thru_dyna_symbol = true}
    assert_equal true, thru_dyna_symbol
  end

  def test_else
    thru_else = false
    parse('if foo; bar else zot end', :on_else) {thru_else = true}
    assert_equal true, thru_else
  end

  def test_elsif
    thru_elsif = false
    parse('if foo; bar elsif qux; zot end', :on_elsif) {thru_elsif = true}
    assert_equal true, thru_elsif
  end

  def test_ensure
    thru_ensure = false
    parse('begin foo ensure bar end', :on_ensure) {thru_ensure = true}
    assert_equal true, thru_ensure
  end

  def test_fcall
    thru_fcall = false
    parse('foo()', :on_fcall) {thru_fcall = true}
    assert_equal true, thru_fcall
  end

  def test_field
    thru_field = false
    parse('foo.x = 1', :on_field) {thru_field = true}
    assert_equal true, thru_field
  end

  def test_for
    thru_for = false
    parse('for i in foo; end', :on_for) {thru_for = true}
    assert_equal true, thru_for
  end

  def test_hash
    thru_hash = false
    parse('{1=>2}', :on_hash) {thru_hash = true}
    assert_equal true, thru_hash
    thru_hash = false
    parse('{a: 2}', :on_hash) {thru_hash = true}
    assert_equal true, thru_hash
  end

  def test_if
    thru_if = false
    parse('if false; end', :on_if) {thru_if = true}
    assert_equal true, thru_if
  end

  def test_if_mod
    thru_if_mod = false
    parse('nil if nil', :on_if_mod) {thru_if_mod = true}
    assert_equal true, thru_if_mod
  end

  def test_ifop
    thru_ifop = false
    parse('a ? b : c', :on_ifop) {thru_ifop = true}
    assert_equal true, thru_ifop
  end

  def test_ignored_nl
    ignored_nl = []
    parse("foo # comment\n...\n", :on_ignored_nl) {|_, a| ignored_nl << a}
    assert_equal ["\n"], ignored_nl
  end

  def test_lambda
    thru_lambda = false
    parse('->{}', :on_lambda) {thru_lambda = true}
    assert_equal true, thru_lambda
  end

  def test_magic_comment
    thru_magic_comment = false
    parse('# -*- bug-5753: ruby-dev:44984 -*-', :on_magic_comment) {|*x|thru_magic_comment = x}
    assert_equal [:on_magic_comment, "bug_5753", "ruby-dev:44984"], thru_magic_comment
  end

  def test_method_add_block
    thru_method_add_block = false
    parse('a {}', :on_method_add_block) {thru_method_add_block = true}
    assert_equal true, thru_method_add_block
    thru_method_add_block = false
    parse('a do end', :on_method_add_block) {thru_method_add_block = true}
    assert_equal true, thru_method_add_block
  end

  def test_method_add_arg
    thru_method_add_arg = false
    parse('a()', :on_method_add_arg) {thru_method_add_arg = true}
    assert_equal true, thru_method_add_arg
    thru_method_add_arg = false
    parse('a {}', :on_method_add_arg) {thru_method_add_arg = true}
    assert_equal true, thru_method_add_arg
    thru_method_add_arg = false
    parse('a.b(1)', :on_method_add_arg) {thru_method_add_arg = true}
    assert_equal true, thru_method_add_arg
    thru_method_add_arg = false
    parse('a::b(1)', :on_method_add_arg) {thru_method_add_arg = true}
    assert_equal true, thru_method_add_arg
  end

  def test_module
    thru_module = false
    parse('module A; end', :on_module) {thru_module = true}
    assert_equal true, thru_module
  end

  def test_mrhs_add
    thru_mrhs_add = false
    parse('a = a, b', :on_mrhs_add) {thru_mrhs_add = true}
    assert_equal true, thru_mrhs_add
  end

  def test_mrhs_add_star
    thru_mrhs_add_star = false
    parse('a = a, *b', :on_mrhs_add_star) {thru_mrhs_add_star = true}
    assert_equal true, thru_mrhs_add_star
  end

  def test_mrhs_new
    thru_mrhs_new = false
    parse('a = *a', :on_mrhs_new) {thru_mrhs_new = true}
    assert_equal true, thru_mrhs_new
  end

  def test_mrhs_new_from_args
    thru_mrhs_new_from_args = false
    parse('a = a, b', :on_mrhs_new_from_args) {thru_mrhs_new_from_args = true}
    assert_equal true, thru_mrhs_new_from_args
  end

  def test_next
    thru_next = false
    parse('a {next}', :on_next) {thru_next = true}
    assert_equal true, thru_next
  end

  def test_opassign
    thru_opassign = false
    tree = parse('a += b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),+=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a -= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),-=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a *= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),*=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a /= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),/=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a %= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),%=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a **= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),**=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a &= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),&=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a |= b', :on_opassign) {thru_opassign = true}
    assert_equal "[opassign(var_field(a),|=,vcall(b))]", tree
    assert_equal true, thru_opassign
    thru_opassign = false
    tree = parse('a <<= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),<<=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a >>= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),>>=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a &&= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),&&=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a ||= b', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(var_field(a),||=,vcall(b))]", tree
    thru_opassign = false
    tree = parse('a::X ||= c 1', :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(const_path_field(vcall(a),X),||=,command(c,[1]))]", tree

    thru_opassign = false
    tree = parse("self.foo += 1", :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(field(ref(self),.,foo),+=,1)]", tree

    thru_opassign = false
    tree = parse("self&.foo += 1", :on_opassign) {thru_opassign = true}
    assert_equal true, thru_opassign
    assert_equal "[opassign(field(ref(self),&.,foo),+=,1)]", tree
  end

  def test_opassign_error
    thru_opassign = []
    events = [:on_opassign]
    parse('$~ ||= 1', events) {|a,*b|
      thru_opassign << a
    }
    assert_equal events, thru_opassign
  end

  def test_param_error
    thru_param_error = false
    parse('def foo(A) end', :on_param_error) {thru_param_error = true}
    assert_equal true, thru_param_error
    thru_param_error = false
    parse('def foo($a) end', :on_param_error) {thru_param_error = true}
    assert_equal true, thru_param_error
    thru_param_error = false
    parse('def foo(@a) end', :on_param_error) {thru_param_error = true}
    assert_equal true, thru_param_error
    thru_param_error = false
    parse('def foo(@@a) end', :on_param_error) {thru_param_error = true}
    assert_equal true, thru_param_error
  end

  def test_params
    arg = nil
    thru_params = false
    parse('a {||}', :on_params) {|_, *v| thru_params = true; arg = v}
    assert_equal true, thru_params
    assert_equal [nil, nil, nil, nil, nil, nil, nil], arg
    thru_params = false
    parse('a {|x|}', :on_params) {|_, *v| thru_params = true; arg = v}
    assert_equal true, thru_params
    assert_equal [["x"], nil, nil, nil, nil, nil, nil], arg
    thru_params = false
    parse('a {|*x|}', :on_params) {|_, *v| thru_params = true; arg = v}
    assert_equal true, thru_params
    assert_equal [nil, nil, "*x", nil, nil, nil, nil], arg
    thru_params = false
    parse('a {|x: 1|}', :on_params) {|_, *v| thru_params = true; arg = v}
    assert_equal true, thru_params
    assert_equal [nil, nil, nil, nil, [["x:", "1"]], nil, nil], arg
    thru_params = false
    parse('a {|x:|}', :on_params) {|_, *v| thru_params = true; arg = v}
    assert_equal true, thru_params
    assert_equal [nil, nil, nil, nil, [["x:", false]], nil, nil], arg
    thru_params = false
    parse('a {|**x|}', :on_params) {|_, *v| thru_params = true; arg = v}
    assert_equal true, thru_params
    assert_equal [nil, nil, nil, nil, nil, "**x", nil], arg
    thru_params = false
    parse('a {|**nil|}', :on_params) {|_, *v| thru_params = true; arg = v}
    assert_equal true, thru_params
    assert_equal [nil, nil, nil, nil, nil, :nil, nil], arg
  end

  def test_params_mlhs
    thru_mlhs = false
    tree = parse("proc {|(a, b)|}", :on_mlhs_paren) {thru_mlhs = true}
    assert_equal true, thru_mlhs
    assert_include(tree, "[mlhs([a,b])]")
  end

  def test_params_mlhs_add
    thru_mlhs_add = false
    tree = parse("proc {|(a, b)|}", :on_mlhs_add) {thru_mlhs_add = true}
    assert_equal true, thru_mlhs_add
    assert_include(tree, "[mlhs([a,b])]")
  end

  def test_params_mlhs_add_star
    thru_mlhs_add_star = false
    tree = parse("proc {|(a, *b)|}", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "[mlhs([a,*b])]")
    thru_mlhs_add_star = false
    tree = parse("proc {|(a, *b, c)|}", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "[mlhs([a,*b,c])]")
    thru_mlhs_add_star = false
    tree = parse("proc {|(a, *, c)|}", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "[mlhs([a,*,c])]")
    thru_mlhs_add_star = false
    tree = parse("proc {|(*b, c)|}", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "[mlhs([*b,c])]")
    thru_mlhs_add_star = false
    tree = parse("proc {|(*b)|}", :on_mlhs_add_star) {thru_mlhs_add_star = true}
    assert_equal true, thru_mlhs_add_star
    assert_include(tree, "[mlhs([*b])]")
  end

  def test_params_mlhs_add_post
    thru_mlhs_add_post = false
    tree = parse("proc {|(a, *b)|}", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal false, thru_mlhs_add_post
    assert_include(tree, "mlhs([a,*b])")
    thru_mlhs_add_post = false
    tree = parse("proc {|(a, *b, c)|}", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal true, thru_mlhs_add_post
    assert_include(tree, "mlhs([a,*b,c])")
    thru_mlhs_add_post = false
    tree = parse("proc {|(a, *, c)|}", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal true, thru_mlhs_add_post
    assert_include(tree, "mlhs([a,*,c])")
    thru_mlhs_add_post = false
    tree = parse("proc {|(*b, c)|}", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal true, thru_mlhs_add_post
    assert_include(tree, "mlhs([*b,c])")
    thru_mlhs_add_post = false
    tree = parse("proc {|(*, c)|}", :on_mlhs_add_post) {thru_mlhs_add_post = true}
    assert_equal true, thru_mlhs_add_post
    assert_include(tree, "mlhs([*,c])")
  end

  def test_params_mlhs_new
    thru_mlhs_new = false
    tree = parse("proc {|(a, b)|}", :on_mlhs_new) {thru_mlhs_new = true}
    assert_equal true, thru_mlhs_new
    assert_include(tree, "[mlhs([a,b])]")
  end

  def test_params_mlhs_paren
    thru_mlhs_paren = 0
    tree = parse("proc {|(a, b)|}", :on_mlhs_paren) {thru_mlhs_paren += 1}
    assert_equal 1, thru_mlhs_paren
    assert_include(tree, "[mlhs([a,b])]")
    thru_mlhs_paren = 0
    tree = parse("proc {|((a, b))|}", :on_mlhs_paren) {thru_mlhs_paren += 1}
    assert_equal 2, thru_mlhs_paren
    assert_include(tree, "[mlhs([a,b])]")
  end

  def test_paren
    thru_paren = false
    parse('()', :on_paren) {thru_paren = true}
    assert_equal true, thru_paren
  end

  def test_parse_error
    thru_parse_error = false
    parse('<>', :on_parse_error) {thru_parse_error = true}
    assert_equal true, thru_parse_error
  end

  def test_qwords_add
    thru_qwords_add = false
    tree = parse('%w[a]', :on_qwords_add) {thru_qwords_add = true}
    assert_equal true, thru_qwords_add
    assert_equal '[array([a])]', tree
    thru_qwords_add = false
    tree = parse('%w[ a ]', :on_qwords_add) {thru_qwords_add = true}
    assert_equal true, thru_qwords_add
    assert_equal '[array([a])]', tree
  end

  def test_qsymbols_add
    thru_qsymbols_add = false
    tree = parse('%i[a]', :on_qsymbols_add) {thru_qsymbols_add = true}
    assert_equal true, thru_qsymbols_add
    assert_equal '[array([:a])]', tree
    thru_qsymbols_add = false
    tree = parse('%i[ a ]', :on_qsymbols_add) {thru_qsymbols_add = true}
    assert_equal true, thru_qsymbols_add
    assert_equal '[array([:a])]', tree
  end

  def test_symbols_add
    thru_symbols_add = false
    tree = parse('%I[a]', :on_symbols_add) {thru_symbols_add = true}
    assert_equal true, thru_symbols_add
    assert_equal '[array([:a])]', tree
    thru_symbols_add = false
    tree = parse('%I[ a ]', :on_symbols_add) {thru_symbols_add = true}
    assert_equal true, thru_symbols_add
    assert_equal '[array([:a])]', tree
  end

  def test_qwords_new
    thru_qwords_new = false
    parse('%w[]', :on_qwords_new) {thru_qwords_new = true}
    assert_equal true, thru_qwords_new
  end

  def test_qsymbols_new
    thru_qsymbols_new = false
    parse('%i[]', :on_qsymbols_new) {thru_qsymbols_new = true}
    assert_equal true, thru_qsymbols_new
  end

  def test_symbols_new
    thru_symbols_new = false
    parse('%I[]', :on_symbols_new) {thru_symbols_new = true}
    assert_equal true, thru_symbols_new
  end

  def test_redo
    thru_redo = false
    parse('redo', :on_redo) {thru_redo = true}
    assert_equal true, thru_redo
  end

  def test_regexp_add
    thru_regexp_add = false
    parse('/foo/', :on_regexp_add) {thru_regexp_add = true}
    assert_equal true, thru_regexp_add
  end

  def test_regexp_literal
    thru_regexp_literal = false
    parse('//', :on_regexp_literal) {thru_regexp_literal = true}
    assert_equal true, thru_regexp_literal
  end

  def test_regexp_new
    thru_regexp_new = false
    parse('//', :on_regexp_new) {thru_regexp_new = true}
    assert_equal true, thru_regexp_new
  end

  def test_rescue
    thru_rescue = false
    parsed = parse('begin; 1; rescue => e; 2; end', :on_rescue) {thru_rescue = true}
    assert_equal true, thru_rescue
    assert_match(/1.*rescue/, parsed)
    assert_match(/rescue\(,var_field\(e\),\[2\]\)/, parsed)
  end

  def test_rescue_class
    thru_rescue = false
    parsed = parse('begin; 1; rescue RuntimeError => e; 2; end', :on_rescue) {thru_rescue = true}
    assert_equal true, thru_rescue
    assert_match(/1.*rescue/, parsed)
    assert_match(/rescue\(\[ref\(RuntimeError\)\],var_field\(e\),\[2\]\)/, parsed)
  end

  def test_rescue_mod
    thru_rescue_mod = false
    parsed = parse('1 rescue 2', :on_rescue_mod) {thru_rescue_mod = true}
    assert_equal true, thru_rescue_mod
    bug4716 = '[ruby-core:36248]'
    assert_equal "[rescue_mod(1,2)]", parsed, bug4716
  end

  def test_rest_param
    thru_rest_param = false
    parse('def a(*) end', :on_rest_param) {thru_rest_param = true}
    assert_equal true, thru_rest_param
    thru_rest_param = false
    parse('def a(*x) end', :on_rest_param) {thru_rest_param = true}
    assert_equal true, thru_rest_param
  end

  def test_kwrest_param
    thru_kwrest = false
    parse('def a(**) end', :on_kwrest_param) {|n, val| thru_kwrest = val}
    assert_equal nil, thru_kwrest
    thru_kwrest = false
    parse('def a(**x) end', :on_kwrest_param) {|n, val| thru_kwrest = val}
    assert_equal "x", thru_kwrest
  end

  def test_nokw_param
    thru_nokw = false
    parse('def a(**nil) end', :on_nokw_param) {|n, val| thru_nokw = val}
    assert_equal nil, thru_nokw
  end

  def test_retry
    thru_retry = false
    parse('retry', :on_retry) {thru_retry = true}
    assert_equal true, thru_retry
  end

  def test_return
    thru_return = false
    parse('return a', :on_return) {thru_return = true}
    assert_equal true, thru_return
  end

  def test_return0
    thru_return0 = false
    parse('return', :on_return0) {thru_return0 = true}
    assert_equal true, thru_return0
  end

  def test_sclass
    thru_sclass = false
    parse('class << a; end', :on_sclass) {thru_sclass = true}
    assert_equal true, thru_sclass
  end

  def test_string_add
    thru_string_add = false
    parse('"aa"', :on_string_add) {thru_string_add = true}
    assert_equal true, thru_string_add
  end

  def test_string_concat
    thru_string_concat = false
    parse('"a" "b"', :on_string_concat) {thru_string_concat = true}
    assert_equal true, thru_string_concat
  end

  def test_string_content
    thru_string_content = false
    parse('""', :on_string_content) {thru_string_content = true}
    assert_equal true, thru_string_content
    thru_string_content = false
    parse('"a"', :on_string_content) {thru_string_content = true}
    assert_equal true, thru_string_content
    thru_string_content = false
    parse('%[a]', :on_string_content) {thru_string_content = true}
    assert_equal true, thru_string_content
    thru_string_content = false
    parse('\'a\'', :on_string_content) {thru_string_content = true}
    assert_equal true, thru_string_content
    thru_string_content = false
    parse('%<a>', :on_string_content) {thru_string_content = true}
    assert_equal true, thru_string_content
    thru_string_content = false
    parse('%!a!', :on_string_content) {thru_string_content = true}
    assert_equal true, thru_string_content
    thru_string_content = false
    parse('%q!a!', :on_string_content) {thru_string_content = true}
    assert_equal true, thru_string_content
    thru_string_content = false
    parse('%Q!a!', :on_string_content) {thru_string_content = true}
    assert_equal true, thru_string_content
  end

  def test_string_dvar
    thru_string_dvar = false
    parse('"#$a"', :on_string_dvar) {thru_string_dvar = true}
    assert_equal true, thru_string_dvar
    thru_string_dvar = false
    parse('\'#$a\'', :on_string_dvar) {thru_string_dvar = true}
    assert_equal false, thru_string_dvar
    thru_string_dvar = false
    parse('"#@a"', :on_string_dvar) {thru_string_dvar = true}
    assert_equal true, thru_string_dvar
    thru_string_dvar = false
    parse('\'#@a\'', :on_string_dvar) {thru_string_dvar = true}
    assert_equal false, thru_string_dvar
    thru_string_dvar = false
    parse('"#@@a"', :on_string_dvar) {thru_string_dvar = true}
    assert_equal true, thru_string_dvar
    thru_string_dvar = false
    parse('\'#@@a\'', :on_string_dvar) {thru_string_dvar = true}
    assert_equal false, thru_string_dvar
    thru_string_dvar = false
    parse('"#$1"', :on_string_dvar) {thru_string_dvar = true}
    assert_equal true, thru_string_dvar
    thru_string_dvar = false
    parse('\'#$1\'', :on_string_dvar) {thru_string_dvar = true}
    assert_equal false, thru_string_dvar
  end

  def test_string_embexpr
    thru_string_embexpr = false
    parse('"#{}"', :on_string_embexpr) {thru_string_embexpr = true}
    assert_equal true, thru_string_embexpr
    thru_string_embexpr = false
    parse('\'#{}\'', :on_string_embexpr) {thru_string_embexpr = true}
    assert_equal false, thru_string_embexpr
  end

  def test_string_literal
    thru_string_literal = false
    parse('""', :on_string_literal) {thru_string_literal = true}
    assert_equal true, thru_string_literal
  end

  def test_super
    thru_super = false
    parse('super()', :on_super) {thru_super = true}
    assert_equal true, thru_super
  end

  def test_symbol
    thru_symbol = false
    parse(':a', :on_symbol) {thru_symbol = true}
    assert_equal true, thru_symbol
    thru_symbol = false
    parse(':$a', :on_symbol) {thru_symbol = true}
    assert_equal true, thru_symbol
    thru_symbol = false
    parse(':@a', :on_symbol) {thru_symbol = true}
    assert_equal true, thru_symbol
    thru_symbol = false
    parse(':@@a', :on_symbol) {thru_symbol = true}
    assert_equal true, thru_symbol
    thru_symbol = false
    parse(':==', :on_symbol) {thru_symbol = true}
    assert_equal true, thru_symbol
  end

  def test_symbol_literal
    thru_symbol_literal = false
    parse(':a', :on_symbol_literal) {thru_symbol_literal = true}
    assert_equal true, thru_symbol_literal
  end

  def test_top_const_field
    thru_top_const_field = false
    parse('::A=1', :on_top_const_field) {thru_top_const_field = true}
    assert_equal true, thru_top_const_field
  end

  def test_top_const_ref
    thru_top_const_ref = false
    parse('::A', :on_top_const_ref) {thru_top_const_ref = true}
    assert_equal true, thru_top_const_ref
  end

  def test_unary
    thru_unary = false
    parse('not a 1, 2', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('not (a)', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('!a', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('-10', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('-10*2', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('-10.1', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('-10.1*2', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('-a', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('+a', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('~a', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
    thru_unary = false
    parse('not()', :on_unary) {thru_unary = true}
    assert_equal true, thru_unary
  end

  def test_undef
    thru_undef = false
    parse('undef a', :on_undef) {thru_undef = true}
    assert_equal true, thru_undef
    thru_undef = false
    parse('undef <=>', :on_undef) {thru_undef = true}
    assert_equal true, thru_undef
    thru_undef = false
    parse('undef a, b', :on_undef) {thru_undef = true}
    assert_equal true, thru_undef
  end

  def test_unless
    thru_unless = false
    parse('unless a; end', :on_unless) {thru_unless = true}
    assert_equal true, thru_unless
  end

  def test_unless_mod
    thru_unless_mod = false
    parse('nil unless a', :on_unless_mod) {thru_unless_mod = true}
    assert_equal true, thru_unless_mod
  end

  def test_until
    thru_until = false
    parse('until a; end', :on_until) {thru_until = true}
    assert_equal true, thru_until
  end

  def test_until_mod
    thru_until_mod = false
    parse('nil until a', :on_until_mod) {thru_until_mod = true}
    assert_equal true, thru_until_mod
  end

  def test_var_field
    thru_var_field = false
    parse('a = 1', :on_var_field) {thru_var_field = true}
    assert_equal true, thru_var_field
    thru_var_field = false
    parse('a += 1', :on_var_field) {thru_var_field = true}
    assert_equal true, thru_var_field
  end

  def test_when
    thru_when = false
    parse('case a when b; end', :on_when) {thru_when = true}
    assert_equal true, thru_when
    thru_when = false
    parse('case when a; end', :on_when) {thru_when = true}
    assert_equal true, thru_when
  end

  def test_while
    thru_while = false
    parse('while a; end', :on_while) {thru_while = true}
    assert_equal true, thru_while
  end

  def test_while_mod
    thru_while_mod = false
    parse('nil while a', :on_while_mod) {thru_while_mod = true}
    assert_equal true, thru_while_mod
  end

  def test_word_add
    thru_word_add = false
    parse('%W[a]', :on_word_add) {thru_word_add = true}
    assert_equal true, thru_word_add
  end

  def test_word_new
    thru_word_new = false
    parse('%W[a]', :on_word_new) {thru_word_new = true}
    assert_equal true, thru_word_new
  end

  def test_words_add
    thru_words_add = false
    tree = parse('%W[a]', :on_words_add) {thru_words_add = true}
    assert_equal true, thru_words_add
    assert_equal '[array([a])]', tree
    thru_words_add = false
    tree = parse('%W[ a ]', :on_words_add) {thru_words_add = true}
    assert_equal true, thru_words_add
    assert_equal '[array([a])]', tree
  end

  def test_words_new
    thru_words_new = false
    parse('%W[]', :on_words_new) {thru_words_new = true}
    assert_equal true, thru_words_new
  end

  def test_xstring_add
    thru_xstring_add = false
    parse('`x`', :on_xstring_add) {thru_xstring_add = true}
    assert_equal true, thru_xstring_add
  end

  def test_xstring_literal
    thru_xstring_literal = false
    parse('``', :on_xstring_literal) {thru_xstring_literal = true}
    assert_equal true, thru_xstring_literal
  end

  def test_xstring_new
    thru_xstring_new = false
    parse('``', :on_xstring_new) {thru_xstring_new = true}
    assert_equal true, thru_xstring_new
  end

  def test_yield
    thru_yield = false
    parse('yield a', :on_yield) {thru_yield = true}
    assert_equal true, thru_yield
  end

  def test_yield0
    thru_yield0 = false
    parse('yield', :on_yield0) {thru_yield0 = true}
    assert_equal true, thru_yield0
  end

  def test_zsuper
    thru_zsuper = false
    parse('super', :on_zsuper) {thru_zsuper = true}
    assert_equal true, thru_zsuper
  end

  def test_local_variables
    cmd = 'command(w,[regexp_literal(regexp_add(regexp_new(),25 # ),/)])'
    div = 'binary(ref(w),/,25)'
    bug1939 = '[ruby-core:24923]'

    assert_equal("[#{cmd}]", parse('w /25 # /'), bug1939)
    assert_equal("[assign(var_field(w),1),#{div}]", parse("w = 1; w /25 # /"), bug1939)
    assert_equal("[fcall(p,[],&block([w],[#{div}]))]", parse("p{|w|w /25 # /\n}"), bug1939)
    assert_equal("[def(p,[w],bodystmt([#{div}]))]", parse("def p(w)\nw /25 # /\nend"), bug1939)
  end

  def test_block_variables
    bug4159 = '[ruby-dev:39423]'
    assert_equal("[fcall(proc,[],&block([],[void()]))]", parse("proc{|;y|}"), bug4159)
    assert_equal("[fcall(proc,[],&block([],[unary(!,ref(y))]))]", parse("proc{|;y|!y}"), bug4159)
  end

  def test_unterminated_regexp
    assert_equal("unterminated regexp meets end of file", compile_error('/'))
  end

  def test_invalid_instance_variable_name
    assert_equal("`@1' is not allowed as an instance variable name", compile_error('proc{@1}'))
    assert_equal("`@' without identifiers is not allowed as an instance variable name", compile_error('@%'))
    assert_equal("`@' without identifiers is not allowed as an instance variable name", compile_error('@'))
  end

  def test_invalid_class_variable_name
    assert_equal("`@@1' is not allowed as a class variable name", compile_error('@@1'))
    assert_equal("`@@' without identifiers is not allowed as a class variable name", compile_error('@@%'))
    assert_equal("`@@' without identifiers is not allowed as a class variable name", compile_error('@@'))
  end

  def test_invalid_global_variable_name
    assert_equal("`$%' is not allowed as a global variable name", compile_error('$%'))
    assert_equal("`$' without identifiers is not allowed as a global variable name", compile_error('$'))
  end

  def test_warning_ignored_magic_comment
    fmt, *args = warning("1; #-*- frozen-string-literal: true -*-")
    assert_match(/ignored after any tokens/, fmt)
    assert_equal("frozen_string_literal", args[0])
  end

  def test_warning_invalid_magic_comment
    fmt, *args = warning("#-*- frozen-string-literal: nottrue -*-")
    assert_match(/invalid value/, fmt)
    assert_equal(%w"frozen_string_literal nottrue", args)
  end

  def test_warn_cr_in_middle
    fmt = nil
    assert_warn("") {fmt, = warn("\r;")}
    assert_match(/encountered/, fmt)
  end

  def test_warn_mismatched_indentations
    fmt, tokend, tokbeg, line = assert_warning("") {break warn("if true\n  end\n")}
    assert_match(/mismatched indentations/, fmt)
    assert_equal(["if", "end", 1], [tokbeg, tokend, line])
    result = assert_warning("") {
      warn("begin\n" "  def f() = nil\n" "end\n") {break :ok}
    }
    assert_equal(:ok, result)
  end

  def test_in
    thru_in = false
    parse('case 0; in 0; end', :on_in) {thru_in = true}
    assert_equal true, thru_in
  end

  def test_aryptn
    thru_aryptn = false
    parse('case 0; in [0]; end', :on_aryptn) {thru_aryptn = true}
    assert_equal true, thru_aryptn
  end

  def test_fndptn
    thru_fndptn = false
    parse('case 0; in [*,0,*]; end', :on_fndptn) {thru_fndptn = true}
    assert_equal true, thru_fndptn
  end

  def test_hshptn
    thru_hshptn = false
    parse('case 0; in {a:}; end', :on_hshptn) {thru_hshptn = true}
    assert_equal true, thru_hshptn
  end
end if ripper_test