underscore vs. `with(this)`

Hi, I have a test case that looks like this:

var _ = require('underscore');
JS.Test.describe("reduce", function() { with(this) {
  it('should run rereduce', function(resume) { with(this) {
    // trying to use `_` here results in the error below
  }});
}});

Using var __ = require('underscore'); and using __ (double underscore subsequently) works fine.

Do JS.Test.describe() or it() have a property _ that is extracted using with(this)?

Should/could this be fixed to be compatible with canonical underscore-ish usage?

The error:

TypeError: Object function () {
    var base = arguments[0],
        args = [],
        i, n;

    for (i = 1, n = arguments.length; i < n; i++) args.push(arguments[i]);
    return  (typeof base === 'object' && base) ||
            (typeof base === 'function' && base.apply(this, args)) ||
            this;
  } has no method 'range'
    var base = arguments[0],
        args = [],
        i, n;

    for (i = 1, n = arguments.length; i < n; i++) args.push(arguments[i]);
    return  (typeof base === 'object' && base) ||
            (typeof base === 'function' && base.apply(this, args)) ||
            this;
  } has no method 'range'
    at null.test: should run reduce (lib/tests/reduce.js:12:17)
    at null.<anonymous> (node_modules/jstest/jstest.js:5102:18)
    at Test.Unit.extend.TestCase.JS.Class.extend.runWithExceptionHandlers (node_modules/jstest/jstest.js:4971:16)
    at Test.Unit.extend.TestCase.JS.Class.exec (node_modules/jstest/jstest.js:5101:18)
    at null.<anonymous> (node_modules/jstest/jstest.js:5068:14)
    at Test.Unit.extend.TestCase.JS.Class.exec (node_modules/jstest/jstest.js:5073:41)
    at null.<anonymous> (node_modules/jstest/jstest.js:5115:18)
    at iterate (node_modules/jstest/jstest.js:4853:49)
    at ping (node_modules/jstest/jstest.js:4845:29)
    at Test.Unit.extend.TestSuite.JS.Class.extend.forEach (node_modules/jstest/jstest.js:4860:9)

jcoglan / jstest

underscore vs. `with(this)` #1