Generates a NullObject from an interface. It was created for testing and AOP.
composer require --dev koriym/null-object
Instantiate a Null Object from an Interface.
interface FooInterface
{
public function do(): void;
}$nullObject = $this->nullObject->newInstance(FooInterface::class);
assert($nullObject instanceof FooInterface);
$nullObject->do(); // nothing's going to happennewInstance() defines a class with eval, but use save() to save the generated code to a file.
$class = $this->nullObject->save(FooInterface::class, '/path/to/saveDirectory');
assert(new $class instanceof FooInterface);It is also possible to create a null object by simply adding a Null suffix to the interface by registering autoloader, If this doesn't sound too wild to you.
$loader = require __DIR__ . '/vendor/koriym/null-object/autoload.php';
spl_autoload_register($loader);or add it to autoload-dev in composer.json.
"autoload-dev": {
"files": ["./vendor/koriym/null-object/autoload.php"]
}You can create Null Object as follows.
$nullClass = FooInterface::class . 'Null'; // add Null suffix to the interface
$foo = new $nullClass; // instantiate a NullObject
assert($foo instanceof FooInterface);Inherited interfaces are not yet supported.