text: 'use strict';
  
  // precondition must be met; this is to avoid 
  // running tests on prod env and making 
  // changes on prod database accidentally
  
  var env_is_correct = ( process.env.NODE_ENV == 'development') ;
  
  if ( !env_is_correct ) {
    var err_str = '[\n' +
    ' ERROR! Env variable NODE_ENV mismatch - no test can run!\n' +
    '\t1) If your env is prod, then these tests should not be run anyhow!\n' +
    '\t2) If your env is dev, then you have forgot to set NODE_ENV.\n' + 
    '\t   If so, to fix this, exec:\n\n' +
    '\t\texport NODE_ENV=development\n\n' + 
    '\t   (then it should be possible to run the tests).\n' +
    ']';
    
    console.error(err_str);
    // this must abruptly end whole process
    process.exit(1);
  }