matthiasnoback / phpunit-asynchronicity
Library for asserting things that happen asynchronously with PHPUnit
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Requires
- php: ^8.1
Requires (Dev)
- ext-pcntl: *
- phpstan/phpstan: ^1.10
- phpunit/phpunit: ^10.0 || ^11.0
This package is auto-updated.
Last update: 2024-11-07 10:11:51 UTC
README
Using this library you can make a test wait for certain conditions, e.g. to test the output of another process.
See my blog post on the subject for an explanation of the concepts and some code samples. Please note that this article covers version 1 of the library.
Usage
With PHPUnit
use Asynchronicity\PHPUnit\Asynchronicity; use PHPUnit\Framework\Assert; use PHPUnit\Framework\TestCase; final class ProcessTest extends TestCase { use Asynchronicity; /** * @test */ public function it_creates_a_pid_file(): void { // start the asynchronous process that will eventually create a PID file... self::assertEventually( function (): void { Assert::assertFileExists(__DIR__ . '/pid'); } ); } }
With Behat
Within a Behat FeatureContext
you could use it for example that a page eventually contains some text:
use Asynchronicity\PHPUnit\Asynchronicity; use Behat\MinkExtension\Context\MinkContext; use PHPUnit\Framework\Assert; final class FeatureContext extends MinkContext { use Asynchronicity; /** * @Then the stock level has been updated to :expectedStockLevel */ public function thenTheFileHasBeenCreated(string $expectedStockLevel): void { self::assertEventually(function () use ($expectedStockLevel): void { $this->visit('/stock-levels'); $actualStockLevel = $this->getSession()->getPage())->find('css', '.stock-level')->getText(); Assert::assertEquals($expectedStockLevel, $actualStockLevel); }); } }
Comments and suggestions
- You can use
$this
inside these callables. - You can add
use ($...)
to pass in extra data. - You can throw any type of exception inside the callable to indicate that what you're looking for is not yet the case.
- Often it's convenient to just use the usual assertion methods (PHPUnit or otherwise) inside the callable. They will often provide the right amount of detail in their error messages too.
assertEventually()
supports extra arguments for setting the timeout and wait time in milliseconds.- You can use any callable as the first argument to
assertEventually()
, including objects with an__invoke()
method or something like[$object, 'methodName']
.