make the test more intersting

Author: sigmaSd

test/test_with_gc.ts

@@ -1,16 +1,17 @@
-import python from "@denosaurs/python";
+import python from "../mod.ts";
+import { assertEquals } from "./asserts.ts";
 
 Deno.test("js fns are automaticlly converted to callbacks", () => {
   const pyModule = python.runModule(
     `
 def call_the_callback(cb):
   result = cb()
-  return result
+  return result + 1
   `,
     "test_module",
   );
 
-  pyModule.call_the_callback(() => 4);
+  assertEquals(pyModule.call_the_callback(() => 4).valueOf(), 5);
 
   // @ts-ignore:requires: --v8-flags=--expose-gc
   gc(); // if this is comm