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: interpolation_compiler_test.rb
    path of file: ./repos/i18n/test/backend
    
    the code of the file until where you have to start completion: require 'test_helper'

class InterpolationCompilerTest < I18n::TestCase
  Compiler = I18n::Bac
    
  def test_escape_plain_string_properly_escapes
    assert_escapes_plain_string '\\"',    '"'
    assert_escapes_plain_string '\'',     '\''
    assert_escapes_plain_string '\\#',    '#'
    assert_escapes_plain_string '\\#{}',  '#{}'
    assert_escapes_plain_string '\\\\\\"','\\"'
  end