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{
  pkgs,
  lib,
}:
pkgs.writeShellScript "run_test_description" ''
  set -e

  [ "$#" -ne 1 ] && {
    echo "Usage: $0 <Test description file>";
    exit 2
  }
  description="$1"

  __TEST_TMUX="${lib.getExe pkgs.tmux}"
  __TEST_TMUX_PANE="__TEST_TMUX_PANE"
  __TEST_AWK_CLEAN_FILE="${./clean.awk}"

  . ${./driver.sh}

  echo "Setting up a session.."
  if "$__TEST_TMUX" has-session -t "$__TEST_TMUX_PANE"; then
    echo "Killing old '$__TEST_TMUX_PANE'"
    "$__TEST_TMUX" kill-session -t "$__TEST_TMUX_PANE"
  fi
  "$__TEST_TMUX" new-session -d -s "$__TEST_TMUX_PANE"

  echo "Initializing pipe.."
  "$__TEST_TMUX" pipe-pane -t "$__TEST_TMUX_PANE" -o 'cat >>./test.golden'

  echo "Evaluating description.."
  __test_eval "$description"

  "$__TEST_TMUX" pipe-pane -t "$__TEST_TMUX_PANE"
''