You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: code_search_spec.rb
    path of file: ./repos/syntax_suggest/spec/unit
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require_relative "../spec_helper"

module SyntaxSuggest
  RSpec.describe CodeSearch do
    it "rexe regression" do
      lines = fixtures_dir.join("rexe.rb.txt").read.lines
      lines.delete_at(148 - 1)
      source = lines.join

      search = CodeSearch.new(source)
      search.call

      expect(search.invalid_blocks.join.strip).to eq(<<~EOM.strip)
        class Lookups
      EOM
    end

    it "squished do regression" do
      source = <<~EOM
        def call
          trydo

            @options = CommandLineParser.n
    
        def foo
          def blerg
        end
      EOM
      search.call

      expect(search.invalid_blocks.join).to eq(<<~EOM.indent(2))
        def blerg
      EOM
    end

    it "finds a naked end" do
      search = CodeSearch.new(<<~EOM)
        def foo
          end # one
        end # two
      EOM
      search.call

      expect(search.invalid_blocks.join).to eq(<<~EOM.indent(2))
        end # one
      EOM
    end

    it "returns when no invalid blocks are found" do
      search = CodeSearch.new(<<~EOM)
        def foo
          puts 'lol'
        end
      EOM
      search.call

      expect(search.invalid_blocks).to eq([])
    end

    it "expands frontier by eliminating valid lines" do
      search = CodeSearch.new(<<~EOM)
        def foo
          puts 'lol'
        end
      EOM
      search.create_blocks_from_untracked_lines

      expect(search.code_lines.join).to eq(<<~EOM)
        def foo
        end
      EOM
    end
  end
end