add tests for sortableset

test/SortableSet.test.js

@@ -0,0 +1,23 @@
+/* globals describe, it */
+"use strict";
+
+const SortableSet = require("../lib/util/SortableSet");
+
+describe("util/SortableSet", () => {
+	it("Can be constructed like a normal Set", () => {
+		const sortableSet = new SortableSet([1,1,1,1,1,4,5,2], () =>{});
+		Array.from(sortableSet).should.eql([1,4,5,2]);
+	});
+
+	it("Can sort its content", () => {
+		const sortableSet = new SortableSet([1,1,1,6,6,1,1,4,5,2,3,8,5,7,9,0,3,1], (a,b) => a - b);
+		sortableSet.sort();
+		Array.from(sortableSet).should.eql([0,1,2,3,4,5,6,7,8,9]);
+	});
+
+	it("Can sort by a specified function", () => {
+		const sortableSet = new SortableSet([1,1,1,6,6,1,1,4,5,2,3,8,5,7,9,0,3,1], (a,b) => a - b);
+		sortableSet.sortWith((a,b)=> b - a);
+		Array.from(sortableSet).should.eql([9,8,7,6,5,4,3,2,1,0]);
+	});
+});