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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { assertCallbackErrorUncaught } from "../_test_utils.ts";import { readlink, readlinkSync } from "./_fs_readlink.ts";import { assert, assertEquals } from "../../testing/asserts.ts";import * as path from "../path.ts";import { isWindows } from "../../_util/os.ts";
const testDir = Deno.makeTempDirSync();const oldname = path.join(testDir, "oldname");const newname = path.join(testDir, "newname");
if (isWindows) {  Deno.symlinkSync(oldname, newname, { type: "file" });} else {  Deno.symlinkSync(oldname, newname);}
Deno.test({  name: "readlinkSuccess",  async fn() {    const data = await new Promise((res, rej) => {      readlink(newname, (err, data) => {        if (err) {          rej(err);        }        res(data);      });    });
    assertEquals(typeof data, "string");    assertEquals(data as string, oldname);  },});
Deno.test({  name: "readlinkEncodeBufferSuccess",  async fn() {    const data = await new Promise((res, rej) => {      readlink(newname, { encoding: "buffer" }, (err, data) => {        if (err) {          rej(err);        }        res(data);      });    });
    assert(data instanceof Uint8Array);    assertEquals(new TextDecoder().decode(data as Uint8Array), oldname);  },});
Deno.test({  name: "readlinkSyncSuccess",  fn() {    const data = readlinkSync(newname);    assertEquals(typeof data, "string");    assertEquals(data as string, oldname);  },});
Deno.test({  name: "readlinkEncodeBufferSuccess",  fn() {    const data = readlinkSync(newname, { encoding: "buffer" });    assert(data instanceof Uint8Array);    assertEquals(new TextDecoder().decode(data as Uint8Array), oldname);  },});
Deno.test("[std/node/fs] readlink callback isn't called twice if error is thrown", async () => {  const importUrl = new URL("./_fs_readlink.ts", import.meta.url);  await assertCallbackErrorUncaught({    prelude: `import { readlink } from ${JSON.stringify(importUrl)}`,    invocation: `readlink(${JSON.stringify(newname)}, `,  });});