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nodejs/test/parallel/test-fs-writev.js
Ruben Bridgewater e038d6a1cd
test: refactor common.expectsError
This completely refactors the `expectsError` behavior: so far it's
almost identical to `assert.throws(fn, object)` in case it was used
with a function as first argument. It had a magical property check
that allowed to verify a functions `type` in case `type` was passed
used in the validation object. This pattern is now completely removed
and `assert.throws()` should be used instead.

The main intent for `common.expectsError()` is to verify error cases
for callback based APIs. This is now more flexible by accepting all
validation possibilites that `assert.throws()` accepts as well. No
magical properties exist anymore. This reduces surprising behavior
for developers who are not used to the Node.js core code base.

This has the side effect that `common` is used significantly less
frequent.

PR-URL: https://github.com/nodejs/node/pull/31092
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
2019-12-31 15:54:20 +01:00

93 lines
2.2 KiB
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
const path = require('path');
const fs = require('fs');
const tmpdir = require('../common/tmpdir');
tmpdir.refresh();
const expected = 'ümlaut. Лорем 運務ホソモ指及 आपको करने विकास 紙読決多密所 أضف';
const getFileName = (i) => path.join(tmpdir.path, `writev_${i}.txt`);
/**
* Testing with a array of buffers input
*/
// fs.writev with array of buffers with all parameters
{
const filename = getFileName(1);
const fd = fs.openSync(filename, 'w');
const buffer = Buffer.from(expected);
const bufferArr = [buffer, buffer];
const done = common.mustCall((err, written, buffers) => {
assert.ifError(err);
assert.deepStrictEqual(bufferArr, buffers);
const expectedLength = bufferArr.length * buffer.byteLength;
assert.deepStrictEqual(written, expectedLength);
fs.closeSync(fd);
assert(Buffer.concat(bufferArr).equals(fs.readFileSync(filename)));
});
fs.writev(fd, bufferArr, null, done);
}
// fs.writev with array of buffers without position
{
const filename = getFileName(2);
const fd = fs.openSync(filename, 'w');
const buffer = Buffer.from(expected);
const bufferArr = [buffer, buffer];
const done = common.mustCall((err, written, buffers) => {
assert.ifError(err);
assert.deepStrictEqual(bufferArr, buffers);
const expectedLength = bufferArr.length * buffer.byteLength;
assert.deepStrictEqual(written, expectedLength);
fs.closeSync(fd);
assert(Buffer.concat(bufferArr).equals(fs.readFileSync(filename)));
});
fs.writev(fd, bufferArr, done);
}
/**
* Testing with wrong input types
*/
{
const filename = getFileName(3);
const fd = fs.openSync(filename, 'w');
[false, 'test', {}, [{}], ['sdf'], null, undefined].forEach((i) => {
assert.throws(
() => fs.writev(fd, i, null, common.mustNotCall()), {
code: 'ERR_INVALID_ARG_TYPE',
name: 'TypeError'
}
);
});
fs.closeSync(fd);
}
// fs.writev with wrong fd types
[false, 'test', {}, [{}], null, undefined].forEach((i) => {
assert.throws(
() => fs.writev(i, common.mustNotCall()),
{
code: 'ERR_INVALID_ARG_TYPE',
name: 'TypeError'
}
);
});