Helpers for PHP unit testing

php-TestUtils.php

<?php

namespace Tests;

use PHPUnit\Framework\TestCase;

class TestUtils
{
    public static function invokePrivateMethod(object $object, string $methodName): callable
    {
        $reflection = new \ReflectionClass($object);
        $method = $reflection->getMethod($methodName);
        $method->setAccessible(true);

        $invoke = function (...$params) use ($object, $method) {
            return $method->invokeArgs($object, $params);
        };

        return $invoke;
    }

    public static function setPrivateProperty(object $object, string $propertyName, $value): object
    {
        $reflection = new \ReflectionClass($object);
        $property = $reflection->getProperty($propertyName);
        $property->setAccessible(true);
        $property->setValue($object, $value);

        return $object;
    }

    public static function getPrivateProperty(object $object, string $propertyName)
    {
        $reflection = new \ReflectionClass($object);
        $property = $reflection->getProperty($propertyName);
        $property->setAccessible(true);

        return $property->getValue($object);
    }

    public static function markAsNonStrictUnitTest(TestCase $testClass)
    {
        if (self::isStrictUnitTestModeActive($testClass)) {
            return $testClass->markTestSkipped('Non strict unit test.');
        }
    }

    private static function isStrictUnitTestModeActive(TestCase $testClass): bool
    {
        if ((isset($testClass->strictUnitTestModeActive))) {
            return (bool) $testClass->strictUnitTestModeActive;
        }

        return true;
    }

}