/**
* Extends a service definition.
*
* @param string $name
* @param callable $callable
* @param boolean $strict
*
* @return callable
*
* @throws InvalidArgumentException
*/
public function extend($name, $callable, $strict = true)
{
if (!$this->services->has($name)) {
if ($strict) {
throw new InvalidArgumentException(sprintf('Service "%s" is not defined.', $name));
} else {
return false;
}
}
$factory = $this->services->get($name);
if (!is_object($factory) || !method_exists($factory, '__invoke')) {
throw new InvalidArgumentException(sprintf('Service "%s" does not contain an object definition.', $name));
}
if (!is_object($callable) || !method_exists($callable, '__invoke')) {
throw new InvalidArgumentException('Extension service definition is not a Closure or invokable object.');
}
$extended = function ($c) use($callable, $factory) {
/** @var Closure $factory */
return $callable($factory($c), $c);
};
if ($this->factories->contains($factory)) {
$this->factories->detach($factory);
$this->factories->attach($extended);
}
$this->services->unlock($name);
$this->services->set($name, $extended);
return $this->services->get($name);
}
public function testContents()
{
$lockbox = new LockBox();
$lockbox->set('item1', 'value1');
$lockbox->set('item2', 'value2');
$lockbox->set('item3', 'value3');
$lockbox->set('item4', 'value4');
$this->assertEquals(['item1', 'item2', 'item3', 'item4'], $lockbox->contents());
}