mirror of
https://github.com/denoland/deno.git
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119 lines
3.3 KiB
TypeScript
119 lines
3.3 KiB
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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import * as path from "@std/path";
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import { Buffer } from "node:buffer";
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import * as fs from "node:fs/promises";
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import { assert, assertEquals } from "@std/assert";
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const moduleDir = path.dirname(path.fromFileUrl(import.meta.url));
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const testData = path.resolve(moduleDir, "testdata", "hello.txt");
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const decoder = new TextDecoder();
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Deno.test("readFileSuccess", async function () {
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const fileHandle = await fs.open(testData);
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const data = await fileHandle.readFile();
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assert(data instanceof Uint8Array);
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assertEquals(decoder.decode(data as Uint8Array), "hello world");
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await fileHandle.close();
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});
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Deno.test("read", async function () {
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const fileHandle = await fs.open(testData);
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const byteLength = "hello world".length;
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const buf = new Buffer(byteLength);
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await fileHandle.read(buf, 0, byteLength, 0);
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assertEquals(decoder.decode(buf as Uint8Array), "hello world");
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await fileHandle.close();
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});
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Deno.test("read specify opt", async function () {
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const fileHandle = await fs.open(testData);
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const byteLength = "hello world".length;
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const opt = {
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buffer: new Buffer(byteLength),
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offset: 6,
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length: 5,
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position: 6,
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};
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let res = await fileHandle.read(opt);
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assertEquals(res.bytesRead, 5);
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assertEquals(
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new TextDecoder().decode(res.buffer.subarray(6) as Uint8Array),
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"world",
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);
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const opt2 = {
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buffer: new Buffer(byteLength),
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length: 5,
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position: 0,
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};
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res = await fileHandle.read(opt2);
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assertEquals(res.bytesRead, 5);
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assertEquals(
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decoder.decode(res.buffer.subarray(0, 5) as Uint8Array),
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"hello",
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);
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await fileHandle.close();
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});
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Deno.test("[node/fs filehandle.write] Write from Buffer", async function () {
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const tempFile: string = await Deno.makeTempFile();
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const fileHandle = await fs.open(tempFile, "a+");
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const buffer = Buffer.from("hello world");
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const res = await fileHandle.write(buffer, 0, 5, 0);
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const data = Deno.readFileSync(tempFile);
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await Deno.remove(tempFile);
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await fileHandle.close();
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assertEquals(res.bytesWritten, 5);
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assertEquals(decoder.decode(data), "hello");
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});
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Deno.test("[node/fs filehandle.write] Write from string", async function () {
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const tempFile: string = await Deno.makeTempFile();
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const fileHandle = await fs.open(tempFile, "a+");
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const str = "hello world";
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const res = await fileHandle.write(str);
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const data = Deno.readFileSync(tempFile);
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await Deno.remove(tempFile);
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await fileHandle.close();
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assertEquals(res.bytesWritten, 11);
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assertEquals(decoder.decode(data), "hello world");
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});
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Deno.test("[node/fs filehandle.stat] Get file status", async function () {
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const fileHandle = await fs.open(testData);
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const stat = await fileHandle.stat();
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assertEquals(stat.isFile(), true);
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assertEquals(stat.size, "hello world".length);
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await fileHandle.close();
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});
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Deno.test("[node/fs filehandle.writeFile] Write to file", async function () {
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const tempFile: string = await Deno.makeTempFile();
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const fileHandle = await fs.open(tempFile, "w");
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const str = "hello world";
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await fileHandle.writeFile(str);
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const data = Deno.readFileSync(tempFile);
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await Deno.remove(tempFile);
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await fileHandle.close();
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assertEquals(decoder.decode(data), "hello world");
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});
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