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denoland-deno/cli/tests/unit/esnext_test.ts
2021-07-19 11:56:14 +10:00

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TypeScript

// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
import { assertEquals, unitTest } from "./test_util.ts";
// TODO(@kitsonk) remove when we are no longer patching TypeScript to have
// these types available.
unitTest(function typeCheckingEsNextArrayString() {
const a = "abcdef";
assertEquals(a.at(-1), "f");
const b = ["a", "b", "c", "d", "e", "f"];
assertEquals(b.at(-1), "f");
});