Add embdoc indent test

Author: tompng

test/irb/test_ruby_lex.rb

@@ -598,6 +598,29 @@ def test_local_variables_dependent_code
  assert_code_block_open(lines, false, local_variables: ['a'])
  end
 
+ def test_embdoc_indent
+ input_with_correct_indents = [
+ Row.new(%q(=begin), 0, 0, 0),
+ Row.new(%q(a), 0, 0, 0),
+ Row.new(%q( b), 1, 1, 0),
+ Row.new(%q(=end), 0, 0, 0),
+ Row.new(%q(if 1), 0, 2, 1),
+ Row.new(%q( 2), 2, 2, 1),
+ Row.new(%q(=begin), 0, 0, 1),
+ Row.new(%q(a), 0, 0, 1),
+ Row.new(%q( b), 1, 1, 1),
+ Row.new(%q(=end), 0, 2, 1),
+ Row.new(%q( 3), 2, 2, 1),
+ Row.new(%q(end), 0, 0, 0),
+ ]
+ lines = []
+ input_with_correct_indents.each do |row|
+ lines << row.content
+ assert_row_indenting(lines, row)
+ assert_nesting_level(lines, row.nesting_level)
+ end
+ end
+
  def test_heredoc_with_indent
  if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.7.0')
  pend 'This test needs Ripper::Lexer#scan to take broken tokens'