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denoland-deno/tests/unit_node/_fs/_fs_handle_test.ts

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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import * as path from "@std/path";
import { Buffer } from "node:buffer";
import * as fs from "node:fs/promises";
import { assert, assertEquals } from "@std/assert";
feat(node_compat): Added base implementation of FileHandle (#19294) <!-- Before submitting a PR, please read https://deno.com/manual/contributing 1. Give the PR a descriptive title. Examples of good title: - fix(std/http): Fix race condition in server - docs(console): Update docstrings - feat(doc): Handle nested reexports Examples of bad title: - fix #7123 - update docs - fix bugs 2. Ensure there is a related issue and it is referenced in the PR text. 3. Ensure there are tests that cover the changes. 4. Ensure `cargo test` passes. 5. Ensure `./tools/format.js` passes without changing files. 6. Ensure `./tools/lint.js` passes. 7. Open as a draft PR if your work is still in progress. The CI won't run all steps, but you can add '[ci]' to a commit message to force it to. 8. If you would like to run the benchmarks on the CI, add the 'ci-bench' label. --> ## WHY ref: https://github.com/denoland/deno/issues/19165 Node's fs/promises includes a FileHandle class, but deno does not. The open function in Node's fs/promises returns a FileHandle, which provides an IO interface to the file. However, deno's open function returns a resource id. ### deno ```js > const fs = await import("node:fs/promises"); undefined > const file3 = await fs.open("./README.md"); undefined > file3 3 > file3.read undefined Node: ``` ### Node ```js > const fs = await import("fs/promises"); undefined > const file3 = await fs.open("./tests/e2e_unit/testdata/file.txt"); undefined > file3 FileHandle { _events: [Object: null prototype] {}, _eventsCount: 0, _maxListeners: undefined, close: [Function: close], [Symbol(kCapture)]: false, [Symbol(kHandle)]: FileHandle {}, [Symbol(kFd)]: 24, [Symbol(kRefs)]: 1, [Symbol(kClosePromise)]: null } > file3.read [Function: read] ``` To be compatible with Node, deno's open function should also return a FileHandle. ## WHAT I have implemented the first step in adding a FileHandle. - Changed the return value of the open function to a FileHandle object - Implemented the readFile method in FileHandle - Add test code ## What to do next This PR is the first step in adding a FileHandle, and there are things that should be done next. - Add functionality equivalent to Node's FileHandle to FileHandle (currently there is only readFile) --------- Co-authored-by: Matt Mastracci <matthew@mastracci.com>
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const moduleDir = path.dirname(path.fromFileUrl(import.meta.url));
const testData = path.resolve(moduleDir, "testdata", "hello.txt");
const decoder = new TextDecoder();
feat(node_compat): Added base implementation of FileHandle (#19294) <!-- Before submitting a PR, please read https://deno.com/manual/contributing 1. Give the PR a descriptive title. Examples of good title: - fix(std/http): Fix race condition in server - docs(console): Update docstrings - feat(doc): Handle nested reexports Examples of bad title: - fix #7123 - update docs - fix bugs 2. Ensure there is a related issue and it is referenced in the PR text. 3. Ensure there are tests that cover the changes. 4. Ensure `cargo test` passes. 5. Ensure `./tools/format.js` passes without changing files. 6. Ensure `./tools/lint.js` passes. 7. Open as a draft PR if your work is still in progress. The CI won't run all steps, but you can add '[ci]' to a commit message to force it to. 8. If you would like to run the benchmarks on the CI, add the 'ci-bench' label. --> ## WHY ref: https://github.com/denoland/deno/issues/19165 Node's fs/promises includes a FileHandle class, but deno does not. The open function in Node's fs/promises returns a FileHandle, which provides an IO interface to the file. However, deno's open function returns a resource id. ### deno ```js > const fs = await import("node:fs/promises"); undefined > const file3 = await fs.open("./README.md"); undefined > file3 3 > file3.read undefined Node: ``` ### Node ```js > const fs = await import("fs/promises"); undefined > const file3 = await fs.open("./tests/e2e_unit/testdata/file.txt"); undefined > file3 FileHandle { _events: [Object: null prototype] {}, _eventsCount: 0, _maxListeners: undefined, close: [Function: close], [Symbol(kCapture)]: false, [Symbol(kHandle)]: FileHandle {}, [Symbol(kFd)]: 24, [Symbol(kRefs)]: 1, [Symbol(kClosePromise)]: null } > file3.read [Function: read] ``` To be compatible with Node, deno's open function should also return a FileHandle. ## WHAT I have implemented the first step in adding a FileHandle. - Changed the return value of the open function to a FileHandle object - Implemented the readFile method in FileHandle - Add test code ## What to do next This PR is the first step in adding a FileHandle, and there are things that should be done next. - Add functionality equivalent to Node's FileHandle to FileHandle (currently there is only readFile) --------- Co-authored-by: Matt Mastracci <matthew@mastracci.com>
2023-06-02 10:28:05 -04:00
Deno.test("readFileSuccess", async function () {
const fileHandle = await fs.open(testData);
const data = await fileHandle.readFile();
assert(data instanceof Uint8Array);
assertEquals(decoder.decode(data as Uint8Array), "hello world");
feat(node_compat): Added base implementation of FileHandle (#19294) <!-- Before submitting a PR, please read https://deno.com/manual/contributing 1. Give the PR a descriptive title. Examples of good title: - fix(std/http): Fix race condition in server - docs(console): Update docstrings - feat(doc): Handle nested reexports Examples of bad title: - fix #7123 - update docs - fix bugs 2. Ensure there is a related issue and it is referenced in the PR text. 3. Ensure there are tests that cover the changes. 4. Ensure `cargo test` passes. 5. Ensure `./tools/format.js` passes without changing files. 6. Ensure `./tools/lint.js` passes. 7. Open as a draft PR if your work is still in progress. The CI won't run all steps, but you can add '[ci]' to a commit message to force it to. 8. If you would like to run the benchmarks on the CI, add the 'ci-bench' label. --> ## WHY ref: https://github.com/denoland/deno/issues/19165 Node's fs/promises includes a FileHandle class, but deno does not. The open function in Node's fs/promises returns a FileHandle, which provides an IO interface to the file. However, deno's open function returns a resource id. ### deno ```js > const fs = await import("node:fs/promises"); undefined > const file3 = await fs.open("./README.md"); undefined > file3 3 > file3.read undefined Node: ``` ### Node ```js > const fs = await import("fs/promises"); undefined > const file3 = await fs.open("./tests/e2e_unit/testdata/file.txt"); undefined > file3 FileHandle { _events: [Object: null prototype] {}, _eventsCount: 0, _maxListeners: undefined, close: [Function: close], [Symbol(kCapture)]: false, [Symbol(kHandle)]: FileHandle {}, [Symbol(kFd)]: 24, [Symbol(kRefs)]: 1, [Symbol(kClosePromise)]: null } > file3.read [Function: read] ``` To be compatible with Node, deno's open function should also return a FileHandle. ## WHAT I have implemented the first step in adding a FileHandle. - Changed the return value of the open function to a FileHandle object - Implemented the readFile method in FileHandle - Add test code ## What to do next This PR is the first step in adding a FileHandle, and there are things that should be done next. - Add functionality equivalent to Node's FileHandle to FileHandle (currently there is only readFile) --------- Co-authored-by: Matt Mastracci <matthew@mastracci.com>
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await fileHandle.close();
feat(node_compat): Added base implementation of FileHandle (#19294) <!-- Before submitting a PR, please read https://deno.com/manual/contributing 1. Give the PR a descriptive title. Examples of good title: - fix(std/http): Fix race condition in server - docs(console): Update docstrings - feat(doc): Handle nested reexports Examples of bad title: - fix #7123 - update docs - fix bugs 2. Ensure there is a related issue and it is referenced in the PR text. 3. Ensure there are tests that cover the changes. 4. Ensure `cargo test` passes. 5. Ensure `./tools/format.js` passes without changing files. 6. Ensure `./tools/lint.js` passes. 7. Open as a draft PR if your work is still in progress. The CI won't run all steps, but you can add '[ci]' to a commit message to force it to. 8. If you would like to run the benchmarks on the CI, add the 'ci-bench' label. --> ## WHY ref: https://github.com/denoland/deno/issues/19165 Node's fs/promises includes a FileHandle class, but deno does not. The open function in Node's fs/promises returns a FileHandle, which provides an IO interface to the file. However, deno's open function returns a resource id. ### deno ```js > const fs = await import("node:fs/promises"); undefined > const file3 = await fs.open("./README.md"); undefined > file3 3 > file3.read undefined Node: ``` ### Node ```js > const fs = await import("fs/promises"); undefined > const file3 = await fs.open("./tests/e2e_unit/testdata/file.txt"); undefined > file3 FileHandle { _events: [Object: null prototype] {}, _eventsCount: 0, _maxListeners: undefined, close: [Function: close], [Symbol(kCapture)]: false, [Symbol(kHandle)]: FileHandle {}, [Symbol(kFd)]: 24, [Symbol(kRefs)]: 1, [Symbol(kClosePromise)]: null } > file3.read [Function: read] ``` To be compatible with Node, deno's open function should also return a FileHandle. ## WHAT I have implemented the first step in adding a FileHandle. - Changed the return value of the open function to a FileHandle object - Implemented the readFile method in FileHandle - Add test code ## What to do next This PR is the first step in adding a FileHandle, and there are things that should be done next. - Add functionality equivalent to Node's FileHandle to FileHandle (currently there is only readFile) --------- Co-authored-by: Matt Mastracci <matthew@mastracci.com>
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});
Deno.test("read", async function () {
const fileHandle = await fs.open(testData);
const byteLength = "hello world".length;
const buf = new Buffer(byteLength);
await fileHandle.read(buf, 0, byteLength, 0);
assertEquals(decoder.decode(buf as Uint8Array), "hello world");
await fileHandle.close();
});
Deno.test("read specify opt", async function () {
const fileHandle = await fs.open(testData);
const byteLength = "hello world".length;
const opt = {
buffer: new Buffer(byteLength),
offset: 6,
length: 5,
position: 6,
};
let res = await fileHandle.read(opt);
assertEquals(res.bytesRead, 5);
assertEquals(
new TextDecoder().decode(res.buffer.subarray(6) as Uint8Array),
"world",
);
const opt2 = {
buffer: new Buffer(byteLength),
length: 5,
position: 0,
};
res = await fileHandle.read(opt2);
assertEquals(res.bytesRead, 5);
assertEquals(
decoder.decode(res.buffer.subarray(0, 5) as Uint8Array),
"hello",
);
await fileHandle.close();
});
Deno.test("[node/fs filehandle.write] Write from Buffer", async function () {
const tempFile: string = await Deno.makeTempFile();
const fileHandle = await fs.open(tempFile, "a+");
const buffer = Buffer.from("hello world");
const res = await fileHandle.write(buffer, 0, 5, 0);
const data = Deno.readFileSync(tempFile);
await Deno.remove(tempFile);
await fileHandle.close();
assertEquals(res.bytesWritten, 5);
assertEquals(decoder.decode(data), "hello");
});
Deno.test("[node/fs filehandle.write] Write from string", async function () {
const tempFile: string = await Deno.makeTempFile();
const fileHandle = await fs.open(tempFile, "a+");
const str = "hello world";
const res = await fileHandle.write(str);
const data = Deno.readFileSync(tempFile);
await Deno.remove(tempFile);
await fileHandle.close();
assertEquals(res.bytesWritten, 11);
assertEquals(decoder.decode(data), "hello world");
});