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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;
tmpdir.refresh();
const dest = path.resolve(tmpDir, 'tmp.txt');
const buffer = Buffer.from('abc'.repeat(1000));
const buffer2 = Buffer.from('xyz'.repeat(1000));
async function doWrite() {
await fsPromises.writeFile(dest, buffer);
const data = fs.readFileSync(dest);
assert.deepStrictEqual(data, buffer);
}
async function doAppend() {
await fsPromises.appendFile(dest, buffer2);
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);
}
doWrite()
.then(doAppend)
.then(doRead)
.then(doReadWithEncoding)
.then(common.mustCall());