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const { test } = Deno;import { readFile, readFileSync, readlink, readlinkSync } from "./fs.ts";import * as path from "../path/mod.ts";import { assertEquals, assert } from "../testing/asserts.ts";
const testData = path.resolve(path.join("node", "testdata", "hello.txt"));const testDir = Deno.makeTempDirSync();const oldname = testDir + "/oldname";const newname = testDir + "/newname";
// Need to convert to promises, otherwise test() won't report error correctly.test(async function readFileSuccess() {  const data = await new Promise((res, rej) => {    readFile(testData, (err, data) => {      if (err) {        rej(err);      }      res(data);    });  });
  assert(data instanceof Uint8Array);  assertEquals(new TextDecoder().decode(data as Uint8Array), "hello world");});
test(async function readFileEncodeUtf8Success() {  const data = await new Promise((res, rej) => {    readFile(testData, { encoding: "utf8" }, (err, data) => {      if (err) {        rej(err);      }      res(data);    });  });
  assertEquals(typeof data, "string");  assertEquals(data as string, "hello world");});
test(function readFileSyncSuccess() {  const data = readFileSync(testData);  assert(data instanceof Uint8Array);  assertEquals(new TextDecoder().decode(data as Uint8Array), "hello world");});
test(function readFileEncodeUtf8Success() {  const data = readFileSync(testData, { encoding: "utf8" });  assertEquals(typeof data, "string");  assertEquals(data as string, "hello world");});
// Just for now, until we implement symlink for Windows.if (Deno.build.os !== "win") {  Deno.symlinkSync(oldname, newname);  test(async function readlinkSuccess() {    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);  });
  test(async function readlinkEncodeBufferSuccess() {    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);  });
  test(function readlinkSyncSuccess() {    const data = readlinkSync(newname);    assertEquals(typeof data, "string");    assertEquals(data as string, oldname);  });
  test(function readlinkEncodeBufferSuccess() {    const data = readlinkSync(newname, { encoding: "buffer" });    assert(data instanceof Uint8Array);    assertEquals(new TextDecoder().decode(data as Uint8Array), oldname);  });}