1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { readFile } from "./promises.ts";import * as path from "../../path/mod.ts";import { assert, assertEquals } from "../../testing/asserts.ts";
const moduleDir = path.dirname(path.fromFileUrl(import.meta.url));const testData = path.resolve(moduleDir, "..", "_fs", "testdata", "hello.txt");
Deno.test("readFileSuccess", async function () {  const data: Uint8Array = await readFile(testData);
  assert(data instanceof Uint8Array);  assertEquals(new TextDecoder().decode(data), "hello world");});
Deno.test("readFileBinarySuccess", async function () {  const data: Uint8Array = await readFile(testData, "binary");
  assert(data instanceof Uint8Array);  assertEquals(new TextDecoder().decode(data), "hello world");});
Deno.test("readFileBinaryObjectSuccess", async function () {  const data: Uint8Array = await readFile(testData, { encoding: "binary" });
  assert(data instanceof Uint8Array);  assertEquals(new TextDecoder().decode(data), "hello world");});
Deno.test("readFileStringObjectSuccess", async function () {  const data: string = await readFile(testData, { encoding: "utf8" });
  assertEquals(typeof data, "string");  assertEquals(data, "hello world");});
Deno.test("readFileEncodeHexSuccess", async function () {  const data: string = await readFile(testData, { encoding: "hex" });  assertEquals(typeof data, "string");  assertEquals(data as string, "68656c6c6f20776f726c64");});
Deno.test("readFileEncodeBase64Success", async function () {  const data: string = await readFile(testData, { encoding: "base64" });  assertEquals(typeof data, "string");  assertEquals(data as string, "aGVsbG8gd29ybGQ=");});
Deno.test("readFileStringSuccess", async function () {  const data: string = await readFile(testData, "utf8");
  assertEquals(typeof data, "string");  assertEquals(data, "hello world");});
Deno.test("readFileError", async function () {  try {    await readFile("invalid-file", "utf8");  } catch (e) {    assert(e instanceof Deno.errors.NotFound);  }});