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nodejs/test/parallel/test-buffer-equals.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

26 lines
626 B
JavaScript

'use strict';
require('../common');
const assert = require('assert');
const b = Buffer.from('abcdf');
const c = Buffer.from('abcdf');
const d = Buffer.from('abcde');
const e = Buffer.from('abcdef');
assert.ok(b.equals(c));
assert.ok(!c.equals(d));
assert.ok(!d.equals(e));
assert.ok(d.equals(d));
assert.ok(d.equals(new Uint8Array([0x61, 0x62, 0x63, 0x64, 0x65])));
assert.throws(
() => Buffer.alloc(1).equals('abc'),
{
code: 'ERR_INVALID_ARG_TYPE',
name: 'TypeError',
message: 'The "otherBuffer" argument must be an instance of ' +
"Buffer or Uint8Array. Received type string ('abc')"
}
);