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fs: add flush option to writeFile() functions
This commit adds a 'flush' option to the fs.writeFile family of functions. Refs: nodejs#49886
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| 'use strict'; | ||
| const common = require('../common'); | ||
| const tmpdir = require('../common/tmpdir'); | ||
| const assert = require('node:assert'); | ||
| const fs = require('node:fs'); | ||
| const fsp = require('node:fs/promises'); | ||
| const test = require('node:test'); | ||
| const data = 'foo'; | ||
| let cnt = 0; | ||
|
|
||
| function nextFile() { | ||
| return tmpdir.resolve(`${cnt++}.out`); | ||
| } | ||
|
|
||
| tmpdir.refresh(); | ||
|
|
||
| test('synchronous version', async (t) => { | ||
| await t.test('validation', (t) => { | ||
| for (const v of ['true', '', 0, 1, [], {}, Symbol()]) { | ||
| assert.throws(() => { | ||
| fs.writeFileSync(nextFile(), data, { flush: v }); | ||
| }, { code: 'ERR_INVALID_ARG_TYPE' }); | ||
| } | ||
| }); | ||
|
|
||
| await t.test('performs flush', (t) => { | ||
| const spy = t.mock.method(fs, 'fsyncSync'); | ||
| const file = nextFile(); | ||
| fs.writeFileSync(file, data, { flush: true }); | ||
| const calls = spy.mock.calls; | ||
| assert.strictEqual(calls.length, 1); | ||
| assert.strictEqual(calls[0].result, undefined); | ||
| assert.strictEqual(calls[0].error, undefined); | ||
| assert.strictEqual(calls[0].arguments.length, 1); | ||
| assert.strictEqual(typeof calls[0].arguments[0], 'number'); | ||
| assert.strictEqual(fs.readFileSync(file, 'utf8'), data); | ||
| }); | ||
|
|
||
| await t.test('does not perform flush', (t) => { | ||
| const spy = t.mock.method(fs, 'fsyncSync'); | ||
|
|
||
| for (const v of [undefined, null, false]) { | ||
| const file = nextFile(); | ||
| fs.writeFileSync(file, data, { flush: v }); | ||
| assert.strictEqual(fs.readFileSync(file, 'utf8'), data); | ||
| } | ||
|
|
||
| assert.strictEqual(spy.mock.calls.length, 0); | ||
| }); | ||
| }); | ||
|
|
||
| test('callback version', async (t) => { | ||
| await t.test('validation', (t) => { | ||
| for (const v of ['true', '', 0, 1, [], {}, Symbol()]) { | ||
| assert.throws(() => { | ||
| fs.writeFileSync(nextFile(), data, { flush: v }); | ||
| }, { code: 'ERR_INVALID_ARG_TYPE' }); | ||
| } | ||
| }); | ||
|
|
||
| await t.test('performs flush', (t, done) => { | ||
| const spy = t.mock.method(fs, 'fsync'); | ||
| const file = nextFile(); | ||
| fs.writeFile(file, data, { flush: true }, common.mustSucceed(() => { | ||
| const calls = spy.mock.calls; | ||
| assert.strictEqual(calls.length, 1); | ||
| assert.strictEqual(calls[0].result, undefined); | ||
| assert.strictEqual(calls[0].error, undefined); | ||
| assert.strictEqual(calls[0].arguments.length, 2); | ||
| assert.strictEqual(typeof calls[0].arguments[0], 'number'); | ||
| assert.strictEqual(typeof calls[0].arguments[1], 'function'); | ||
| assert.strictEqual(fs.readFileSync(file, 'utf8'), data); | ||
| done(); | ||
| })); | ||
| }); | ||
|
|
||
| await t.test('does not perform flush', (t, done) => { | ||
| const values = [undefined, null, false]; | ||
| const spy = t.mock.method(fs, 'fsync'); | ||
| let cnt = 0; | ||
|
|
||
| for (const v of values) { | ||
| const file = nextFile(); | ||
|
|
||
| fs.writeFile(file, data, { flush: v }, common.mustSucceed(() => { | ||
| assert.strictEqual(fs.readFileSync(file, 'utf8'), data); | ||
| cnt++; | ||
|
|
||
| if (cnt === values.length) { | ||
| assert.strictEqual(spy.mock.calls.length, 0); | ||
| done(); | ||
| } | ||
| })); | ||
| } | ||
| }); | ||
| }); | ||
|
|
||
| test('promise based version', async (t) => { | ||
| await t.test('validation', async (t) => { | ||
| for (const v of ['true', '', 0, 1, [], {}, Symbol()]) { | ||
| await assert.rejects(() => { | ||
| return fsp.writeFile(nextFile(), data, { flush: v }); | ||
| }, { code: 'ERR_INVALID_ARG_TYPE' }); | ||
| } | ||
| }); | ||
|
|
||
| await t.test('success path', async (t) => { | ||
| for (const v of [undefined, null, false, true]) { | ||
| const file = nextFile(); | ||
| await fsp.writeFile(file, data, { flush: v }); | ||
| assert.strictEqual(await fsp.readFile(file, 'utf8'), data); | ||
| } | ||
| }); | ||
| }); |