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'use strict';
const common = require('../common');
const assert = require('assert');
const path = require('path');
const { writeFile, readFile } = require('fs').promises;
const tmpdir = require('../common/tmpdir');
tmpdir.refresh();
const fn = path.join(tmpdir.path, 'large-file');
async function validateReadFile() {
// Creating large buffer with random content
const buffer = Buffer.from(
Array.apply(null, { length: 16834 * 2 })
.map(Math.random)
.map((number) => (number * (1 << 8)))
);
// Writing buffer to a file then try to read it
await writeFile(fn, buffer);
const readBuffer = await readFile(fn);
assert.strictEqual(readBuffer.equals(buffer), true);
}
async function validateReadFileProc() {
// Test to make sure reading a file under the /proc directory works. Adapted
// from test-fs-read-file-sync-hostname.js.
// Refs:
// - https://groups.google.com/forum/#!topic/nodejs-dev/rxZ_RoH1Gn0
// - https://github.com/nodejs/node/issues/21331
// Test is Linux-specific.
if (!common.isLinux)
return;
const hostname = await readFile('/proc/sys/kernel/hostname');
assert.ok(hostname.length > 0);
}
validateReadFile()
.then(() => validateReadFileProc())
.then(common.mustCall());