mirror of
https://github.com/denoland/deno
synced 2024-09-20 08:32:07 +00:00
d308e8d0c0
Keep in mind Buffer.toString() still exists, but returns [object Object]. Reason for removal of Buffer.toString() was that it implicitly used TextDecoder with fixed "utf-8" encoding and no way to customize the encoding.
101 lines
3 KiB
TypeScript
101 lines
3 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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const { Buffer } = Deno;
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type Reader = Deno.Reader;
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import { assertEquals } from "../testing/asserts.ts";
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import {
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copyN,
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readInt,
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readLong,
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readShort,
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sliceLongToBytes,
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} from "./ioutil.ts";
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import { BufReader } from "./bufio.ts";
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import { stringsReader, tempFile } from "./util.ts";
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import * as path from "../path/mod.ts";
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class BinaryReader implements Reader {
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index = 0;
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constructor(private bytes: Uint8Array = new Uint8Array(0)) {}
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read(p: Uint8Array): Promise<number | null> {
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p.set(this.bytes.subarray(this.index, p.byteLength));
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this.index += p.byteLength;
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return Promise.resolve(p.byteLength);
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}
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}
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Deno.test("testReadShort", async function (): Promise<void> {
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const r = new BinaryReader(new Uint8Array([0x12, 0x34]));
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const short = await readShort(new BufReader(r));
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assertEquals(short, 0x1234);
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});
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Deno.test("testReadInt", async function (): Promise<void> {
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const r = new BinaryReader(new Uint8Array([0x12, 0x34, 0x56, 0x78]));
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const int = await readInt(new BufReader(r));
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assertEquals(int, 0x12345678);
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});
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Deno.test("testReadLong", async function (): Promise<void> {
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const r = new BinaryReader(
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new Uint8Array([0x00, 0x00, 0x00, 0x78, 0x12, 0x34, 0x56, 0x78])
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);
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const long = await readLong(new BufReader(r));
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assertEquals(long, 0x7812345678);
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});
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Deno.test("testReadLong2", async function (): Promise<void> {
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const r = new BinaryReader(
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new Uint8Array([0, 0, 0, 0, 0x12, 0x34, 0x56, 0x78])
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);
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const long = await readLong(new BufReader(r));
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assertEquals(long, 0x12345678);
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});
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Deno.test("testSliceLongToBytes", function (): void {
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const arr = sliceLongToBytes(0x1234567890abcdef);
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const actual = readLong(new BufReader(new BinaryReader(new Uint8Array(arr))));
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const expected = readLong(
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new BufReader(
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new BinaryReader(
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new Uint8Array([0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef])
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)
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)
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);
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assertEquals(actual, expected);
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});
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Deno.test("testSliceLongToBytes2", function (): void {
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const arr = sliceLongToBytes(0x12345678);
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assertEquals(arr, [0, 0, 0, 0, 0x12, 0x34, 0x56, 0x78]);
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});
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Deno.test("testCopyN1", async function (): Promise<void> {
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const w = new Buffer();
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const r = stringsReader("abcdefghij");
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const n = await copyN(r, w, 3);
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assertEquals(n, 3);
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assertEquals(new TextDecoder().decode(w.bytes()), "abc");
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});
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Deno.test("testCopyN2", async function (): Promise<void> {
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const w = new Buffer();
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const r = stringsReader("abcdefghij");
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const n = await copyN(r, w, 11);
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assertEquals(n, 10);
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assertEquals(new TextDecoder().decode(w.bytes()), "abcdefghij");
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});
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Deno.test("copyNWriteAllData", async function (): Promise<void> {
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const { filepath, file } = await tempFile(path.resolve("io"));
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const size = 16 * 1024 + 1;
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const data = "a".repeat(32 * 1024);
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const r = stringsReader(data);
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const n = await copyN(r, file, size); // Over max file possible buffer
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file.close();
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await Deno.remove(filepath);
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assertEquals(n, size);
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});
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