Big update!Announcing Socket for GitHub 1.0. Learn more
Socket
BlogLoveFAQ
Install
Log in

assert-plus

Package Overview
Dependencies
0
Maintainers
2
Versions
8
Issues
File Explorer

Advanced tools

assert-plus

Extra assertions on top of node's assert module

    1.0.0latest

Version published
Maintainers
2
Weekly downloads
22,534,099
decreased by-2.29%

Weekly downloads

Changelog

Source

1.0.0

  • BREAKING assert.number (and derivatives) now accept Infinity as valid input
  • Add assert.finite check. Previous assert.number callers should use this if they expect Infinity inputs to throw.

Readme

Source

assert-plus

This library is a super small wrapper over node's assert module that has two things: (1) the ability to disable assertions with the environment variable NODE_NDEBUG, and (2) some API wrappers for argument testing. Like assert.string(myArg, 'myArg'). As a simple example, most of my code looks like this:

var assert = require('assert-plus'); function fooAccount(options, callback) { assert.object(options, 'options'); assert.number(options.id, 'options.id'); assert.bool(options.isManager, 'options.isManager'); assert.string(options.name, 'options.name'); assert.arrayOfString(options.email, 'options.email'); assert.func(callback, 'callback'); // Do stuff callback(null, {}); }

API

All methods that aren't part of node's core assert API are simply assumed to take an argument, and then a string 'name' that's not a message; AssertionError will be thrown if the assertion fails with a message like:

AssertionError: foo (string) is required at test (/home/mark/work/foo/foo.js:3:9) at Object.<anonymous> (/home/mark/work/foo/foo.js:15:1) at Module._compile (module.js:446:26) at Object..js (module.js:464:10) at Module.load (module.js:353:31) at Function._load (module.js:311:12) at Array.0 (module.js:484:10) at EventEmitter._tickCallback (node.js:190:38)

from:

function test(foo) { assert.string(foo, 'foo'); }

There you go. You can check that arrays are of a homogeneous type with Arrayof$Type:

function test(foo) { assert.arrayOfString(foo, 'foo'); }

You can assert IFF an argument is not undefined (i.e., an optional arg):

assert.optionalString(foo, 'foo');

Lastly, you can opt-out of assertion checking altogether by setting the environment variable NODE_NDEBUG=1. This is pseudo-useful if you have lots of assertions, and don't want to pay typeof () taxes to v8 in production. Be advised: The standard functions re-exported from assert are also disabled in assert-plus if NDEBUG is specified. Using them directly from the assert module avoids this behavior.

The complete list of APIs is:

  • assert.array
  • assert.bool
  • assert.buffer
  • assert.func
  • assert.number
  • assert.finite
  • assert.object
  • assert.string
  • assert.stream
  • assert.date
  • assert.regexp
  • assert.uuid
  • assert.arrayOfArray
  • assert.arrayOfBool
  • assert.arrayOfBuffer
  • assert.arrayOfFunc
  • assert.arrayOfNumber
  • assert.arrayOfFinite
  • assert.arrayOfObject
  • assert.arrayOfString
  • assert.arrayOfStream
  • assert.arrayOfDate
  • assert.arrayOfRegexp
  • assert.arrayOfUuid
  • assert.optionalArray
  • assert.optionalBool
  • assert.optionalBuffer
  • assert.optionalFunc
  • assert.optionalNumber
  • assert.optionalFinite
  • assert.optionalObject
  • assert.optionalString
  • assert.optionalStream
  • assert.optionalDate
  • assert.optionalRegexp
  • assert.optionalUuid
  • assert.optionalArrayOfArray
  • assert.optionalArrayOfBool
  • assert.optionalArrayOfBuffer
  • assert.optionalArrayOfFunc
  • assert.optionalArrayOfNumber
  • assert.optionalArrayOfFinite
  • assert.optionalArrayOfObject
  • assert.optionalArrayOfString
  • assert.optionalArrayOfStream
  • assert.optionalArrayOfDate
  • assert.optionalArrayOfRegexp
  • assert.optionalArrayOfUuid
  • assert.AssertionError
  • assert.fail
  • assert.ok
  • assert.equal
  • assert.notEqual
  • assert.deepEqual
  • assert.notDeepEqual
  • assert.strictEqual
  • assert.notStrictEqual
  • assert.throws
  • assert.doesNotThrow
  • assert.ifError

Installation

npm install assert-plus

License

The MIT License (MIT) Copyright (c) 2012 Mark Cavage

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Bugs

See https://github.com/mcavage/node-assert-plus/issues.

FAQs

What is assert-plus?

Extra assertions on top of node's assert module

Is assert-plus popular?

The npm package assert-plus receives a total of 18,971,864 weekly downloads. As such, assert-plus popularity was classified as popular.

Is assert-plus well maintained?

We found that assert-plus demonstrated a not healthy version release cadence and project activity because the last version was released a year ago.It has 2 open source maintainers collaborating on the project.

Last updated on 27 Jan 2016
Socket

Product

Subscribe to our newsletter

Get open source security insights delivered straight into your inbox. Be the first to learn about new features and product updates.


  • Terms
  • Privacy
  • Security

Made with ⚡️ by Socket Inc