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// Copyright Isaac Z. Schlueter and Contributors. All rights reserved. ISC license.// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { assertEquals } from "../testing/asserts.ts";import * as semver from "./mod.ts";
type PrereleaseParts = [string | number, (number | string)?];
Deno.test("prerelease", function () {  // [prereleaseParts, version]  const versions: [PrereleaseParts | null, string][] = [    [["alpha", 1], "1.2.2-alpha.1"],    [[1], "0.6.1-1"],    [["beta", 2], "1.0.0-beta.2"],    [["pre"], "v0.5.4-pre"],    [["alpha", 1], "1.2.2-alpha.1"],    [null, "~2.0.0-alpha.1"],    [null, "invalid version"],  ];
  versions.forEach(function (tuple) {    const expected = tuple[0];    const version = tuple[1];    const msg = "prerelease(" + version + ")";    assertEquals(      semver.prerelease(version),      expected as unknown as string[],      msg,    );  });});