Page MenuHomeWickedGov Phorge
Files F5980763

README.md
No OneTemporary
Actions

Size
4 KB
Referenced Files
None
Subscribers
None

README.md
View Options

# Eris
[![CI](https://github.com/giorgiosironi/eris/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/giorgiosironi/eris/actions/workflows/ci.yml)
[![Static analysis](https://github.com/giorgiosironi/eris/actions/workflows/static-analysis.yml/badge.svg?branch=master)](https://github.com/giorgiosironi/eris/actions/workflows/static-analysis.yml)
[![Documentation Status](https://readthedocs.org/projects/eris/badge/?version=latest)](http://eris.readthedocs.org/en/latest/?badge=latest)
[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
Eris is a porting of [QuickCheck](https://hackage.haskell.org/package/QuickCheck) and property-based testing tools to the PHP and PHPUnit ecosystem.
In property-based testing, several properties that the System Under Test must respect are defined, and a large sample of generated inputs is sent to it in an attempt to break the properties.
## Compatibility
- PHP 7.4, 8.0, 8.1, 8.2
- PHPUnit 8.x, 9.x
## Installation
You can install Eris through [Composer](https://getcomposer.org/) by running the following command in your terminal:
```
composer require --dev giorgiosironi/eris
```
You can run some of Eris example tests with `vendor/bin/phpunit vendor/giorgiosironi/eris/examples`.
Here is an [empty sample project](https://github.com/giorgiosironi/eris-example) installing Eris.
Please note the project is in alpha stage and the API may change at any time.
## Example usage within PHPUnit
This test tries to verify that natural numbers from 0 to 1000 are all smaller than 42. It's a failing test designed to show you an example of error message.
```php
<?php
use Eris\Generators;
class ReadmeTest extends \PHPUnit\Framework\TestCase
{
use \Eris\TestTrait;
public function testNaturalNumbersMagnitude()
{
$this->forAll(
Generators::choose(0, 1000)
)
->then(function($number) {
$this->assertTrue(
$number < 42,
"$number is not less than 42 apparently"
);
});
}
}
```
Eris generates a sample of elements from the required domain (here the integers from 0 to 1000) and verifies a property on each of them, stopping at the first failure.
```bash
[10:34:32][giorgio@Bipbip:~/code/eris]$ vendor/bin/phpunit examples/ReadmeTest.php
PHPUnit 4.3.5 by Sebastian Bergmann.
Configuration read from /home/giorgio/code/eris/phpunit.xml
F
Time: 234 ms, Memory: 3.25Mb
There was 1 failure:
1) ReadmeTest::testNaturalNumbersMagnitude
42 is not less than 42 apparently
Failed asserting that false is true.
/home/giorgio/code/eris/examples/ReadmeTest.php:15
/home/giorgio/code/eris/src/Eris/Quantifier/Evaluation.php:48
/home/giorgio/code/eris/src/Eris/Quantifier/RoundRobinShrinking.php:45
/home/giorgio/code/eris/src/Eris/Quantifier/ForAll.php:69
/home/giorgio/code/eris/src/Eris/Quantifier/Evaluation.php:50
/home/giorgio/code/eris/src/Eris/Quantifier/ForAll.php:71
/home/giorgio/code/eris/src/Eris/Quantifier/ForAll.php:87
/home/giorgio/code/eris/examples/ReadmeTest.php:16
/home/giorgio/code/eris/examples/ReadmeTest.php:16
FAILURES!
Tests: 1, Assertions: 826, Failures: 1.
```
Eris also tries to shrink the input after a failure, giving you the simplest input that still fails the test. In this example, the original input was probably something like `562`, but Eris tries to make it smaller until the test became green again. The smallest value that still fails the test is the one presented to you.
## Documentation
On ReadTheDocs you can find [the reference documentation for the Eris project](http://eris.readthedocs.org/en/latest/).
## Changelog
Consult [the Changelog file](https://github.com/giorgiosironi/eris/blob/master/CHANGELOG.md) to know the latest new features.
## Support and contributing
Feel free to open issues on the [GitHub project](https://github.com/giorgiosironi/eris/issues) for support and feature requests.
Pull requests are welcome. For anything longer than a few lines it's worth to open an issue first to get feedback on the intended solution and whether it will integrate well with the rest of the codebase.
If you contribute a commit to Eris, you will be credited in the [contributors](CONTRIBUTORS.md) file (unless you don't want to.)

File Metadata

Mime Type
text/plain
Expires
Sat, Oct 3, 21:32 (1 w, 1 d ago)
Storage Engine
local-disk
Storage Format
Raw Data
Storage Handle
2c/57/b14c53c39bcfd45e95b5cf87b583
Default Alt Text
README.md (4 KB)

Event Timeline