The removed test should return!

[DmitryBaranovskiy]

Investigate why the test is not passing while the same code on the page is working perfectly.

The broken test code:

    it("Element.asPX - from em", function() {
        var rect = s.rect(0, 0, 10, '10em');
        var heightAsPx = rect.asPX("height");
        expect(heightAsPx).to.be(160); // assumes 1em = 16px, is this safe?
    });