var prod_dependencies = {
    obj0: require('obj0'),
    obj1: require('obj1')
  };

  var test_dependencies = {
    obj0: require('mockobj0'),
    obj1: require('mockobj1')
  };

  var dependencies = test_dependencies;

  some_func(dependencies.obj0,dependencies.obj1);

Javascript does not need Java-style dependency injection. Javascript's configuration language JSON is valid Javascript.