parse_options

# File railties/lib/rails/test_unit/runner.rb, line 19
        def parse_options(argv)
          # Perform manual parsing and cleanup since option parser raises on unknown options.
          env_index = argv.index("--environment") || argv.index("-e")
          if env_index
            argv.delete_at(env_index)
            environment = argv.delete_at(env_index).strip
          end
          ENV["RAILS_ENV"] = environment || "test"

          w_index = argv.index("--warnings") || argv.index("-w")
          $VERBOSE = argv.delete_at(w_index) if w_index
        end