Reorganize js/unit_tests.ts

js/fetch_test.ts

@@ -0,0 +1,9 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+import { test, testPerm, assert, assertEqual } from "./test_util.ts";
+import * as deno from "deno";
+
+testPerm({ net: true }, async function fetchJsonSuccess() {
+  const response = await fetch("http://localhost:4545/package.json");
+  const json = await response.json();
+  assertEqual(json.name, "deno");
+});