Add testing script for cyclical dependencies

src/junk-drawer/test-kahn-loop.js

@@ -0,0 +1,20 @@
+"use strict";
+
+/*
+parents == dependencies == before
+children == dependents == after
+*/
+
+const sortDependencies = require("../sort-dependencies");
+
+let items = [
+	{ id: 0, deps: { 1:1 } },
+	{ id: 1, deps: { 2:2, 3:3, 4:4 } },
+	// { id: 2, deps: {} },
+	{ id: 2, deps: { 0:0 } },
+	{ id: 3, deps: {} },
+	{ id: 4, deps: {} },
+];
+
+console.log(sortDependencies(items, {}, { ignoreCycles: true }));
+