treetable adding nodes at root level

describe("loadBranch()", function() {
		beforeEach(function() {
		this.newRows = "<tr data-tt-id='3' data-tt-parent-id='2'><td>N3</td></tr><tr data-tt-id='4' data-tt-parent-id='2'><td>N4</td></tr>"
		- this.moreRows = "<tr data-tt-id='5' data-tt-parent-id='2'><td>N5</td></tr>"
		+ this.moreRows = "<tr data-tt-id='5' data-tt-parent-id='2'><td>N5</td></tr>";
		this.subject.treetable();
		this.parentNode = this.subject.treetable("node", 2);
		@@ -276,9 +276,32 @@
		expect(this.subject.data("treetable").tree[4]).to.be.defined;
		});
		+ it("registers nodes", function() {
		+ expect(this.subject.data("treetable").nodes.length).to.equal(3);
		+ this.subject.treetable("loadBranch", this.parentNode, this.newRows);
		+ expect(this.subject.data("treetable").nodes.length).to.equal(5);
		+ });
		+
		it("maintains chainability", function() {
		expect(this.subject.treetable("loadBranch", this.parentNode, this.newRows)).to.equal(this.subject);
		});
		+
		+ describe("adding nodes at root level", function() {
		+ beforeEach(function() {
		+ this.rootRows = "<tr data-tt-id='6'><td>N6</td></tr>";
		+ });
		+
		+ it("registers nodes as root nodes", function () {
		+ expect(this.subject.data("treetable").roots.length).to.equal(1);
		+ this.subject.treetable("loadBranch", null, this.rootRows);
		+ expect(this.subject.data("treetable").roots.length).to.equal(2);
		+ });
		+
		+ it("inserts rows into DOM", function () {
		+ this.subject.treetable("loadBranch", null, this.rootRows);
		+ expect($(this.subject[0].rows[3]).data("ttId")).to.equal(6);
		+ });
		+ });
		});