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'use strict';
const common = require('../common');
// The following tests validate base functionality for the fs.promises
// FileHandle.write 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 validateWrite() {
const filePathForHandle = path.resolve(tmpDir, 'tmp-write.txt');
const fileHandle = await open(filePathForHandle, 'w+');
const buffer = Buffer.from('Hello world'.repeat(100), 'utf8');
await fileHandle.write(buffer, 0, buffer.length);
const readFileData = fs.readFileSync(filePathForHandle);
assert.deepStrictEqual(buffer, readFileData);
await fileHandle.close();
}
async function validateEmptyWrite() {
const filePathForHandle = path.resolve(tmpDir, 'tmp-empty-write.txt');
const fileHandle = await open(filePathForHandle, 'w+');
const buffer = Buffer.from(''); // empty buffer
await fileHandle.write(buffer, 0, buffer.length);
const readFileData = fs.readFileSync(filePathForHandle);
assert.deepStrictEqual(buffer, readFileData);
await fileHandle.close();
}
async function validateNonUint8ArrayWrite() {
const filePathForHandle = path.resolve(tmpDir, 'tmp-data-write.txt');
const fileHandle = await open(filePathForHandle, 'w+');
const buffer = Buffer.from('Hello world', 'utf8').toString('base64');
await fileHandle.write(buffer, 0, buffer.length);
const readFileData = fs.readFileSync(filePathForHandle);
assert.deepStrictEqual(Buffer.from(buffer, 'utf8'), readFileData);
await fileHandle.close();
}
async function validateNonStringValuesWrite() {
const filePathForHandle = path.resolve(tmpDir, 'tmp-non-string-write.txt');
const fileHandle = await open(filePathForHandle, 'w+');
const nonStringValues = [123, {}, new Map()];
for (const nonStringValue of nonStringValues) {
await fileHandle.write(nonStringValue);
}
const readFileData = fs.readFileSync(filePathForHandle);
const expected = ['123', '[object Object]', '[object Map]'].join('');
assert.deepStrictEqual(Buffer.from(expected, 'utf8'), readFileData);
await fileHandle.close();
}
Promise.all([
validateWrite(),
validateEmptyWrite(),
validateNonUint8ArrayWrite(),
validateNonStringValuesWrite()
]).then(common.mustCall());
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