node/test/parallel/test-fs-non-number-arguments-throw.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

49 lines
1.1 KiB
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
const fs = require('fs');
const path = require('path');
const tmpdir = require('../common/tmpdir');
const tempFile = path.join(tmpdir.path, 'fs-non-number-arguments-throw');
tmpdir.refresh();
fs.writeFileSync(tempFile, 'abc\ndef');
// A sanity check when using numbers instead of strings
const sanity = 'def';
const saneEmitter = fs.createReadStream(tempFile, { start: 4, end: 6 });
assert.throws(
() => {
fs.createReadStream(tempFile, { start: '4', end: 6 });
},
{
code: 'ERR_INVALID_ARG_TYPE',
name: 'TypeError'
});
assert.throws(
() => {
fs.createReadStream(tempFile, { start: 4, end: '6' });
},
{
code: 'ERR_INVALID_ARG_TYPE',
name: 'TypeError'
});
assert.throws(
() => {
fs.createWriteStream(tempFile, { start: '4' });
},
{
code: 'ERR_INVALID_ARG_TYPE',
name: 'TypeError'
});
saneEmitter.on('data', common.mustCall(function(data) {
assert.strictEqual(
sanity, data.toString('utf8'),
`read ${data.toString('utf8')} instead of ${sanity}`);
}));