npm package: @stdlib/assert-tools
Description: Assertion utility tools.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
  </summary>
  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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</details>

# Assert

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Assertion utility tools.

<section class="installation">

## Installation

```bash
npm install @stdlib/assert-tools
```

</section>

<section class="usage">

## Usage

```javascript
var tools = require( '@stdlib/assert-tools' );
```

#### tools

Namespace for assertion utility tools.

```javascript
var o = tools;
// returns {...}
```

The namespace contains the following:

<!-- <toc pattern="*"> -->

<div class="namespace-toc">

-   <span class="signature">[`arrayfcn( predicate )`][@stdlib/assert/tools/array-function]</span><span class="delimiter">: </span><span class="description">return a function which tests if every element in an array passes a test condition.</span>
-   <span class="signature">[`arraylikefcn( predicate )`][@stdlib/assert/tools/array-like-function]</span><span class="delimiter">: </span><span class="description">return a function which tests if every element in an array-like object passes a test condition.</span>
-   <span class="signature">[`typedarrayfcn( predicate )`][@stdlib/assert/tools/typed-array-function]</span><span class="delimiter">: </span><span class="description">return a function which tests if every element in a typed array passes a test condition.</span>

</div>

<!-- </toc> -->

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- TODO: better examples -->

<!-- eslint no-undef: "error" -->

```javascript
var objectKeys = require( '@stdlib/utils-keys' );
var tools = require( '@stdlib/assert-tools' );

console.log( objectKeys( tools ) );
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->


<section class="main-repo" >

* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

<!-- /.stdlib -->

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<section class="links">

[npm-image]: http://img.shields.io/npm/v/@stdlib/assert-tools.svg
[npm-url]: https://npmjs.org/package/@stdlib/assert-tools

[test-image]: https://github.com/stdlib-js/assert-tools/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/assert-tools/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/assert-tools/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/assert-tools?branch=main

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[stdlib]: https://github.com/stdlib-js/stdlib

[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors

[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/assert-tools/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-tools/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-tools/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-tools/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-tools/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-tools/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/assert-tools/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-tools/main/LICENSE

<!-- <toc-links> -->

[@stdlib/assert/tools/array-function]: https://www.npmjs.com/package/@stdlib/assert-tools-array-function

[@stdlib/assert/tools/array-like-function]: https://www.npmjs.com/package/@stdlib/assert-tools-array-like-function

[@stdlib/assert/tools/typed-array-function]: https://www.npmjs.com/package/@stdlib/assert-tools-typed-array-function

<!-- </toc-links> -->

</section>

<!-- /.links -->