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<?php |
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declare(strict_types=1); |
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namespace Stratadox\Instantiator\Test; |
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use function array_merge; |
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use Exception; |
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use InvalidArgumentException; |
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use PHPUnit\Framework\TestCase; |
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use ReflectionClass; |
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use stdClass; |
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use Stratadox\Instantiator\NoSuchClass; |
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use Stratadox\Instantiator\InstantiationFailure; |
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use Stratadox\Instantiator\NoConcreteClass; |
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use Stratadox\Instantiator\ObjectInstantiator; |
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use Stratadox\Instantiator\Test\Fixtures\AbstractClass; |
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use Stratadox\Instantiator\Test\Fixtures\AnInterface; |
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use Stratadox\Instantiator\Test\Fixtures\ExceptionThrowingConstructor; |
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use Stratadox\Instantiator\Test\Fixtures\FinalInternal; |
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use Stratadox\Instantiator\Test\Fixtures\PrivateClone; |
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use Stratadox\Instantiator\Test\Fixtures\PrivateConstructor; |
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use Stratadox\Instantiator\Test\Fixtures\PrivateConstructorAndClone; |
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use Stratadox\Instantiator\NotAClass; |
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class Instantiator_creates_empty_instances extends TestCase |
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{ |
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/** |
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* @test |
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* @dataProvider classes |
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*/ |
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function creating_instances_without_calling_the_constructor(string $class) |
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{ |
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$instance = ObjectInstantiator::forThe($class)->instance(); |
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self::assertInstanceOf($class, $instance); |
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} |
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/** |
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* @test |
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* @dataProvider classes |
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*/ |
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function creating_a_new_instance_on_each_call(string $class) |
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{ |
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$instantiator = ObjectInstantiator::forThe($class); |
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$instance1 = $instantiator->instance(); |
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$instance2 = $instantiator->instance(); |
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self::assertEquals($instance1, $instance2); |
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self::assertNotSame($instance1, $instance2); |
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} |
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/** |
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* @test |
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* @dataProvider classes |
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*/ |
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function finding_out_which_class_is_instantiated(string $class) |
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{ |
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self::assertEquals($class, ObjectInstantiator::forThe($class)->class()); |
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} |
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/** |
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* @test |
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* @dataProvider illegalClasses |
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*/ |
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function throwing_an_invalid_argument_exception_when_the_class_does_not_exist( |
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string $class, |
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string $expectedClass |
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) { |
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$this->expectException($expectedClass); |
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ObjectInstantiator::forThe($class); |
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} |
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/** |
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* @test |
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* @dataProvider allClasses |
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*/ |
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function either_throwing_an_exception_in_the_constructor_or_correctly_instantiating( |
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string $class, |
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string $expectedClass = 'N/A' |
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) { |
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try { |
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$instantiator = ObjectInstantiator::forThe($class); |
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} catch (InstantiationFailure $exception) { |
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self::assertInstanceOf($expectedClass, $exception); |
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return; |
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} |
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$instance = $instantiator->instance(); |
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self::assertInstanceOf($class, $instance); |
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} |
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public function classes(): array |
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{ |
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return [ |
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'class with exception in the constructor' => [ExceptionThrowingConstructor::class], |
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'class with private clone' => [PrivateClone::class], |
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'class with private constructor' => [PrivateConstructor::class], |
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'class with private constructor and clone' => [PrivateConstructorAndClone::class], |
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'this test class' => [__CLASS__], |
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'the basic Exception class' => [Exception::class], |
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'an InvalidArgumentException' => [InvalidArgumentException::class], |
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'the built-in stdClass' => [stdClass::class], |
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'a ReflectionClass' => [ReflectionClass::class], |
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'a final internal class' => [FinalInternal::class], |
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]; |
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} |
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public function illegalClasses(): array |
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{ |
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return [ |
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'non existing class' => [ |
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'non existing class', |
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NoSuchClass::class |
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], |
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'abstract class' => [ |
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AbstractClass::class, |
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NoConcreteClass::class |
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], |
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'interface' => [ |
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AnInterface::class, |
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NotAClass::class |
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], |
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]; |
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} |
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public function allClasses(): array |
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{ |
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return array_merge($this->classes(), $this->illegalClasses()); |
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} |
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} |
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Stratadox /
Instantiator
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Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.