var makeDom = require(“../utils”).makeDom; var helpers = require(“../..”); var assert = require(“assert”);

describe(“helpers”, function() {

describe("removeSubsets", function() {
        var removeSubsets = helpers.removeSubsets;
        var dom = makeDom("<div><p><span></span></p><p></p></div>")[0];

        it("removes identical trees", function() {
                var matches = removeSubsets([dom, dom]);
                assert.equal(matches.length, 1);
        });

        it("Removes subsets found first", function() {
                var matches = removeSubsets([dom, dom.children[0].children[0]]);
                assert.equal(matches.length, 1);
        });

        it("Removes subsets found last", function() {
                var matches = removeSubsets([dom.children[0], dom]);
                assert.equal(matches.length, 1);
        });

        it("Does not remove unique trees", function() {
                var matches = removeSubsets([dom.children[0], dom.children[1]]);
                assert.equal(matches.length, 2);
        });
});

describe("compareDocumentPosition", function() {
        var compareDocumentPosition = helpers.compareDocumentPosition;
        var markup = "<div><p><span></span></p><a></a></div>";
        var dom = makeDom(markup)[0];
        var p = dom.children[0];
        var span = p.children[0];
        var a = dom.children[1];

        it("reports when the first node occurs before the second indirectly", function() {
                assert.equal(compareDocumentPosition(span, a), 2);
        });

        it("reports when the first node contains the second", function() {
                assert.equal(compareDocumentPosition(p, span), 10);
        });

        it("reports when the first node occurs after the second indirectly", function() {
                assert.equal(compareDocumentPosition(a, span), 4);
        });

        it("reports when the first node is contained by the second", function() {
                assert.equal(compareDocumentPosition(span, p), 20);
        });

        it("reports when the nodes belong to separate documents", function() {
                var other = makeDom(markup)[0].children[0].children[0];

                assert.equal(compareDocumentPosition(span, other), 1);
        });

        it("reports when the nodes are identical", function() {
                assert.equal(compareDocumentPosition(span, span), 0);
        });
});

describe("uniqueSort", function() {
        var uniqueSort = helpers.uniqueSort;
        var dom, p, span, a;

        beforeEach(function() {
                dom = makeDom("<div><p><span></span></p><a></a></div>")[0];
                p = dom.children[0];
                span = p.children[0];
                a = dom.children[1];
        });

        it("leaves unique elements untouched", function() {
                assert.deepEqual(uniqueSort([p, a]), [p, a]);
        });

        it("removes duplicate elements", function() {
                assert.deepEqual(uniqueSort([p, a, p]), [p, a]);
        });

        it("sorts nodes in document order", function() {
                assert.deepEqual(uniqueSort([a, dom, span, p]), [dom, p, span, a]);
        });
});

});