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'use strict';
const common = require('../common');
// The following tests validate base functionality for the fs.promises
// FileHandle.readFile method.
const fs = require('fs');
const { open } = fs.promises;
const path = require('path');
const tmpdir = require('../common/tmpdir');
const assert = require('assert');
const tmpDir = tmpdir.path;
tmpdir.refresh();
async function validateReadFile() {
const filePath = path.resolve(tmpDir, 'tmp-read-file.txt');
const fileHandle = await open(filePath, 'w+');
const buffer = Buffer.from('Hello world'.repeat(100), 'utf8');
const fd = fs.openSync(filePath, 'w+');
fs.writeSync(fd, buffer, 0, buffer.length);
fs.closeSync(fd);
const readFileData = await fileHandle.readFile();
assert.deepStrictEqual(buffer, readFileData);
await fileHandle.close();
}
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 fileHandle = await open('/proc/sys/kernel/hostname', 'r');
const hostname = await fileHandle.readFile();
assert.ok(hostname.length > 0);
}
validateReadFile()
.then(() => validateReadFileProc())
.then(common.mustCall());
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