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'use strict';
const common = require('../common');
const fs = require('fs');
const fsPromises = fs.promises;
const path = require('path');
const tmpdir = require('../common/tmpdir');
const assert = require('assert');
const tmpDir = tmpdir.path;
const { Readable } = require('stream');
tmpdir.refresh();
const dest = path.resolve(tmpDir, 'tmp.txt');
const otherDest = path.resolve(tmpDir, 'tmp-2.txt');
const buffer = Buffer.from('abc'.repeat(1000));
const buffer2 = Buffer.from('xyz'.repeat(1000));
const stream = Readable.from(['a', 'b', 'c']);
const stream2 = Readable.from(['ümlaut', ' ', 'sechzig']);
const iterable = {
expected: 'abc',
*[Symbol.iterator]() {
yield 'a';
yield 'b';
yield 'c';
}
};
const veryLargeBuffer = {
expected: 'dogs running'.repeat(512 * 1024),
*[Symbol.iterator]() {
yield Buffer.from('dogs running'.repeat(512 * 1024), 'utf8');
}
};
function iterableWith(value) {
return {
*[Symbol.iterator]() {
yield value;
}
};
}
const bufferIterable = {
expected: 'abc',
*[Symbol.iterator]() {
yield Buffer.from('a');
yield Buffer.from('b');
yield Buffer.from('c');
}
};
const asyncIterable = {
expected: 'abc',
async* [Symbol.asyncIterator]() {
yield 'a';
yield 'b';
yield 'c';
}
};
async function doWrite() {
await fsPromises.writeFile(dest, buffer);
const data = fs.readFileSync(dest);
assert.deepStrictEqual(data, buffer);
}
async function doWriteStream() {
await fsPromises.writeFile(dest, stream);
const expected = 'abc';
const data = fs.readFileSync(dest, 'utf-8');
assert.deepStrictEqual(data, expected);
}
async function doWriteStreamWithCancel() {
const controller = new AbortController();
const { signal } = controller;
process.nextTick(() => controller.abort());
assert.rejects(fsPromises.writeFile(otherDest, stream, { signal }), {
name: 'AbortError'
});
}
async function doWriteIterable() {
await fsPromises.writeFile(dest, iterable);
const data = fs.readFileSync(dest, 'utf-8');
assert.deepStrictEqual(data, iterable.expected);
}
async function doWriteInvalidIterable() {
await Promise.all(
[42, 42n, {}, Symbol('42'), true, undefined, null, NaN].map((value) =>
assert.rejects(fsPromises.writeFile(dest, iterableWith(value)), {
code: 'ERR_INVALID_ARG_TYPE',
})
)
);
}
async function doWriteIterableWithEncoding() {
await fsPromises.writeFile(dest, stream2, 'latin1');
const expected = 'ümlaut sechzig';
const data = fs.readFileSync(dest, 'latin1');
assert.deepStrictEqual(data, expected);
}
async function doWriteBufferIterable() {
await fsPromises.writeFile(dest, bufferIterable);
const data = fs.readFileSync(dest, 'utf-8');
assert.deepStrictEqual(data, bufferIterable.expected);
}
async function doWriteAsyncIterable() {
await fsPromises.writeFile(dest, asyncIterable);
const data = fs.readFileSync(dest, 'utf-8');
assert.deepStrictEqual(data, asyncIterable.expected);
}
async function doWriteAsyncLargeIterable() {
await fsPromises.writeFile(dest, veryLargeBuffer);
const data = fs.readFileSync(dest, 'utf-8');
assert.deepStrictEqual(data, veryLargeBuffer.expected);
}
async function doWriteInvalidValues() {
await Promise.all(
[42, 42n, {}, Symbol('42'), true, undefined, null, NaN].map((value) =>
assert.rejects(fsPromises.writeFile(dest, value), {
code: 'ERR_INVALID_ARG_TYPE',
})
)
);
}
async function doWriteWithCancel() {
const controller = new AbortController();
const { signal } = controller;
process.nextTick(() => controller.abort());
assert.rejects(fsPromises.writeFile(otherDest, buffer, { signal }), {
name: 'AbortError'
});
}
async function doAppend() {
await fsPromises.appendFile(dest, buffer2, { flag: null });
const data = fs.readFileSync(dest);
const buf = Buffer.concat([buffer, buffer2]);
assert.deepStrictEqual(buf, data);
}
async function doRead() {
const data = await fsPromises.readFile(dest);
const buf = fs.readFileSync(dest);
assert.deepStrictEqual(buf, data);
}
async function doReadWithEncoding() {
const data = await fsPromises.readFile(dest, 'utf-8');
const syncData = fs.readFileSync(dest, 'utf-8');
assert.strictEqual(typeof data, 'string');
assert.deepStrictEqual(data, syncData);
}
(async () => {
await doWrite();
await doWriteWithCancel();
await doAppend();
await doRead();
await doReadWithEncoding();
await doWriteStream();
await doWriteStreamWithCancel();
await doWriteIterable();
await doWriteInvalidIterable();
await doWriteIterableWithEncoding();
await doWriteBufferIterable();
await doWriteAsyncIterable();
await doWriteAsyncLargeIterable();
await doWriteInvalidValues();
})().then(common.mustCall());
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