Two-way binding through rangeContent()

bindings!.js

describe("makeRangeContentBinder", function () {
    it("should work", function () {
        var o = Bindings.defineBindings({
            source: [1, 2, 3]
        }, {
            target: {"<->": "source.rangeContent()"}
        });

        expect(o.target).toEqual([1,2,3]);

        o.target = [1, 2];
        expect(o.source).toEqual([1,2]);

        o.source = [2,3,4];
        expect(o.target).toEqual([2,3,4]); // Fails, it's still [1,2]
    });
});