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import { assertEquals } from "https://deno.land/std@0.152.0/testing/asserts.ts";import isValidBST from "./index.ts";Deno.test("validate-binary-search-tree", () => {    const inputs = [        {            val: 2,            left: { val: 1, left: null, right: null },            right: { val: 3, left: null, right: null },        },        {            val: 5,            left: { val: 1, left: null, right: null },            right: {                val: 4,                left: { val: 3, left: null, right: null },                right: { val: 6, left: null, right: null },            },        },    ];    assertEquals([true, false], inputs.map(isValidBST));});