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import { assertEquals } from "https://deno.land/std@0.157.0/testing/asserts.ts";
import smallestSubsequence from "./index.ts";
Deno.test("remove-duplicate-letters", () => {    const examples = [        ["bcabc", "abc"],        ["cbacdcbc", "acdb"],    ];
    examples.forEach(([given, expected]) => {        assertEquals(smallestSubsequence(given), expected);    });});