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import { assertEquals } from "https://deno.land/std/testing/asserts.ts";import { effect, ref } from "./mod.ts";
Deno.test("ref", function() {  const a = ref(1);  let dummy = 0;  let calls = 0;  effect(() => {    calls++    dummy = a.value  });  assertEquals(calls, 1);  assertEquals(dummy, 1);  a.value = 2;  assertEquals(calls, 2);  assertEquals(dummy, 2);});