/**
* 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());
}