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: case_1.rb
    path of file: ./repos/sorbet/test/testdata/lsp/completion
    
    the code of the file until where you have to start completion: # typed: true

modul
    
  def self.test1(x)
    puts 'before'
    case x # error: Hint: this "case" token might not be properly closed
    when MethodCompletion.
    #                     ^ completion: x, test1, test2, ...
    puts 'hello' # error: unexpected token tSTRING
  end