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486 lines
17 KiB
486 lines
17 KiB
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\EventDispatcher\Tests;
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use PHPUnit\Framework\TestCase;
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use Symfony\Component\EventDispatcher\Event;
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use Symfony\Component\EventDispatcher\EventDispatcher;
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use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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use Symfony\Contracts\EventDispatcher\Event as ContractsEvent;
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class EventDispatcherTest extends TestCase
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{
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/* Some pseudo events */
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const preFoo = 'pre.foo';
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const postFoo = 'post.foo';
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const preBar = 'pre.bar';
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const postBar = 'post.bar';
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/**
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* @var EventDispatcher
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*/
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private $dispatcher;
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private $listener;
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protected function setUp()
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{
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$this->dispatcher = $this->createEventDispatcher();
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$this->listener = new TestEventListener();
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}
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protected function tearDown()
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{
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$this->dispatcher = null;
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$this->listener = null;
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}
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protected function createEventDispatcher()
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{
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return new EventDispatcher();
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}
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public function testInitialState()
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{
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$this->assertEquals([], $this->dispatcher->getListeners());
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$this->assertFalse($this->dispatcher->hasListeners(self::preFoo));
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$this->assertFalse($this->dispatcher->hasListeners(self::postFoo));
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}
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public function testAddListener()
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{
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$this->dispatcher->addListener('pre.foo', [$this->listener, 'preFoo']);
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$this->dispatcher->addListener('post.foo', [$this->listener, 'postFoo']);
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$this->assertTrue($this->dispatcher->hasListeners());
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$this->assertTrue($this->dispatcher->hasListeners(self::preFoo));
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$this->assertTrue($this->dispatcher->hasListeners(self::postFoo));
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$this->assertCount(1, $this->dispatcher->getListeners(self::preFoo));
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$this->assertCount(1, $this->dispatcher->getListeners(self::postFoo));
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$this->assertCount(2, $this->dispatcher->getListeners());
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}
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public function testGetListenersSortsByPriority()
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{
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$listener1 = new TestEventListener();
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$listener2 = new TestEventListener();
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$listener3 = new TestEventListener();
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$listener1->name = '1';
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$listener2->name = '2';
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$listener3->name = '3';
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$this->dispatcher->addListener('pre.foo', [$listener1, 'preFoo'], -10);
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$this->dispatcher->addListener('pre.foo', [$listener2, 'preFoo'], 10);
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$this->dispatcher->addListener('pre.foo', [$listener3, 'preFoo']);
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$expected = [
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[$listener2, 'preFoo'],
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[$listener3, 'preFoo'],
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[$listener1, 'preFoo'],
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];
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$this->assertSame($expected, $this->dispatcher->getListeners('pre.foo'));
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}
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public function testGetAllListenersSortsByPriority()
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{
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$listener1 = new TestEventListener();
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$listener2 = new TestEventListener();
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$listener3 = new TestEventListener();
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$listener4 = new TestEventListener();
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$listener5 = new TestEventListener();
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$listener6 = new TestEventListener();
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$this->dispatcher->addListener('pre.foo', $listener1, -10);
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$this->dispatcher->addListener('pre.foo', $listener2);
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$this->dispatcher->addListener('pre.foo', $listener3, 10);
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$this->dispatcher->addListener('post.foo', $listener4, -10);
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$this->dispatcher->addListener('post.foo', $listener5);
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$this->dispatcher->addListener('post.foo', $listener6, 10);
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$expected = [
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'pre.foo' => [$listener3, $listener2, $listener1],
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'post.foo' => [$listener6, $listener5, $listener4],
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];
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$this->assertSame($expected, $this->dispatcher->getListeners());
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}
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public function testGetListenerPriority()
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{
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$listener1 = new TestEventListener();
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$listener2 = new TestEventListener();
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$this->dispatcher->addListener('pre.foo', $listener1, -10);
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$this->dispatcher->addListener('pre.foo', $listener2);
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$this->assertSame(-10, $this->dispatcher->getListenerPriority('pre.foo', $listener1));
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$this->assertSame(0, $this->dispatcher->getListenerPriority('pre.foo', $listener2));
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$this->assertNull($this->dispatcher->getListenerPriority('pre.bar', $listener2));
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$this->assertNull($this->dispatcher->getListenerPriority('pre.foo', function () {}));
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}
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public function testDispatch()
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{
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$this->dispatcher->addListener('pre.foo', [$this->listener, 'preFoo']);
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$this->dispatcher->addListener('post.foo', [$this->listener, 'postFoo']);
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$this->dispatcher->dispatch(new Event(), self::preFoo);
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$this->assertTrue($this->listener->preFooInvoked);
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$this->assertFalse($this->listener->postFooInvoked);
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$this->assertInstanceOf('Symfony\Component\EventDispatcher\Event', $this->dispatcher->dispatch(new Event(), 'noevent'));
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$this->assertInstanceOf('Symfony\Component\EventDispatcher\Event', $this->dispatcher->dispatch(new Event(), self::preFoo));
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$event = new Event();
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$return = $this->dispatcher->dispatch($event, self::preFoo);
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$this->assertSame($event, $return);
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}
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public function testDispatchContractsEvent()
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{
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$this->dispatcher->addListener('pre.foo', [$this->listener, 'preFoo']);
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$this->dispatcher->addListener('post.foo', [$this->listener, 'postFoo']);
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$this->dispatcher->dispatch(new ContractsEvent(), self::preFoo);
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$this->assertTrue($this->listener->preFooInvoked);
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$this->assertFalse($this->listener->postFooInvoked);
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$this->assertInstanceOf('Symfony\Component\EventDispatcher\Event', $this->dispatcher->dispatch(new Event(), 'noevent'));
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$this->assertInstanceOf('Symfony\Component\EventDispatcher\Event', $this->dispatcher->dispatch(new Event(), self::preFoo));
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$event = new Event();
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$return = $this->dispatcher->dispatch($event, self::preFoo);
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$this->assertSame($event, $return);
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}
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public function testDispatchForClosure()
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{
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$invoked = 0;
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$listener = function () use (&$invoked) {
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++$invoked;
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};
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$this->dispatcher->addListener('pre.foo', $listener);
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$this->dispatcher->addListener('post.foo', $listener);
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$this->dispatcher->dispatch(new Event(), self::preFoo);
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$this->assertEquals(1, $invoked);
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}
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public function testStopEventPropagation()
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{
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$otherListener = new TestEventListener();
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// postFoo() stops the propagation, so only one listener should
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// be executed
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// Manually set priority to enforce $this->listener to be called first
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$this->dispatcher->addListener('post.foo', [$this->listener, 'postFoo'], 10);
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$this->dispatcher->addListener('post.foo', [$otherListener, 'postFoo']);
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$this->dispatcher->dispatch(new Event(), self::postFoo);
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$this->assertTrue($this->listener->postFooInvoked);
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$this->assertFalse($otherListener->postFooInvoked);
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}
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public function testDispatchByPriority()
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{
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$invoked = [];
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$listener1 = function () use (&$invoked) {
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$invoked[] = '1';
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};
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$listener2 = function () use (&$invoked) {
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$invoked[] = '2';
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};
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$listener3 = function () use (&$invoked) {
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$invoked[] = '3';
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};
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$this->dispatcher->addListener('pre.foo', $listener1, -10);
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$this->dispatcher->addListener('pre.foo', $listener2);
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$this->dispatcher->addListener('pre.foo', $listener3, 10);
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$this->dispatcher->dispatch(new Event(), self::preFoo);
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$this->assertEquals(['3', '2', '1'], $invoked);
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}
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public function testRemoveListener()
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{
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$this->dispatcher->addListener('pre.bar', $this->listener);
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$this->assertTrue($this->dispatcher->hasListeners(self::preBar));
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$this->dispatcher->removeListener('pre.bar', $this->listener);
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$this->assertFalse($this->dispatcher->hasListeners(self::preBar));
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$this->dispatcher->removeListener('notExists', $this->listener);
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}
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public function testAddSubscriber()
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{
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$eventSubscriber = new TestEventSubscriber();
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$this->dispatcher->addSubscriber($eventSubscriber);
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$this->assertTrue($this->dispatcher->hasListeners(self::preFoo));
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$this->assertTrue($this->dispatcher->hasListeners(self::postFoo));
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}
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public function testAddSubscriberWithPriorities()
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{
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$eventSubscriber = new TestEventSubscriber();
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$this->dispatcher->addSubscriber($eventSubscriber);
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$eventSubscriber = new TestEventSubscriberWithPriorities();
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$this->dispatcher->addSubscriber($eventSubscriber);
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$listeners = $this->dispatcher->getListeners('pre.foo');
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$this->assertTrue($this->dispatcher->hasListeners(self::preFoo));
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$this->assertCount(2, $listeners);
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$this->assertInstanceOf('Symfony\Component\EventDispatcher\Tests\TestEventSubscriberWithPriorities', $listeners[0][0]);
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}
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public function testAddSubscriberWithMultipleListeners()
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{
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$eventSubscriber = new TestEventSubscriberWithMultipleListeners();
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$this->dispatcher->addSubscriber($eventSubscriber);
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$listeners = $this->dispatcher->getListeners('pre.foo');
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$this->assertTrue($this->dispatcher->hasListeners(self::preFoo));
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$this->assertCount(2, $listeners);
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$this->assertEquals('preFoo2', $listeners[0][1]);
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}
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public function testRemoveSubscriber()
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{
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$eventSubscriber = new TestEventSubscriber();
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$this->dispatcher->addSubscriber($eventSubscriber);
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$this->assertTrue($this->dispatcher->hasListeners(self::preFoo));
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$this->assertTrue($this->dispatcher->hasListeners(self::postFoo));
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$this->dispatcher->removeSubscriber($eventSubscriber);
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$this->assertFalse($this->dispatcher->hasListeners(self::preFoo));
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$this->assertFalse($this->dispatcher->hasListeners(self::postFoo));
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}
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public function testRemoveSubscriberWithPriorities()
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{
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$eventSubscriber = new TestEventSubscriberWithPriorities();
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$this->dispatcher->addSubscriber($eventSubscriber);
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$this->assertTrue($this->dispatcher->hasListeners(self::preFoo));
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$this->dispatcher->removeSubscriber($eventSubscriber);
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$this->assertFalse($this->dispatcher->hasListeners(self::preFoo));
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}
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public function testRemoveSubscriberWithMultipleListeners()
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{
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$eventSubscriber = new TestEventSubscriberWithMultipleListeners();
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$this->dispatcher->addSubscriber($eventSubscriber);
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$this->assertTrue($this->dispatcher->hasListeners(self::preFoo));
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$this->assertCount(2, $this->dispatcher->getListeners(self::preFoo));
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$this->dispatcher->removeSubscriber($eventSubscriber);
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$this->assertFalse($this->dispatcher->hasListeners(self::preFoo));
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}
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public function testEventReceivesTheDispatcherInstanceAsArgument()
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{
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$listener = new TestWithDispatcher();
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$this->dispatcher->addListener('test', [$listener, 'foo']);
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$this->assertNull($listener->name);
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$this->assertNull($listener->dispatcher);
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$this->dispatcher->dispatch(new Event(), 'test');
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$this->assertEquals('test', $listener->name);
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$this->assertSame($this->dispatcher, $listener->dispatcher);
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}
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/**
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* @see https://bugs.php.net/bug.php?id=62976
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*
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* This bug affects:
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* - The PHP 5.3 branch for versions < 5.3.18
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* - The PHP 5.4 branch for versions < 5.4.8
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* - The PHP 5.5 branch is not affected
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*/
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public function testWorkaroundForPhpBug62976()
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{
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$dispatcher = $this->createEventDispatcher();
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$dispatcher->addListener('bug.62976', new CallableClass());
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$dispatcher->removeListener('bug.62976', function () {});
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$this->assertTrue($dispatcher->hasListeners('bug.62976'));
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}
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public function testHasListenersWhenAddedCallbackListenerIsRemoved()
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{
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$listener = function () {};
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$this->dispatcher->addListener('foo', $listener);
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$this->dispatcher->removeListener('foo', $listener);
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$this->assertFalse($this->dispatcher->hasListeners());
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}
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public function testGetListenersWhenAddedCallbackListenerIsRemoved()
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{
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$listener = function () {};
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$this->dispatcher->addListener('foo', $listener);
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$this->dispatcher->removeListener('foo', $listener);
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$this->assertSame([], $this->dispatcher->getListeners());
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}
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public function testHasListenersWithoutEventsReturnsFalseAfterHasListenersWithEventHasBeenCalled()
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{
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$this->assertFalse($this->dispatcher->hasListeners('foo'));
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$this->assertFalse($this->dispatcher->hasListeners());
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}
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public function testHasListenersIsLazy()
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{
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$called = 0;
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$listener = [function () use (&$called) { ++$called; }, 'onFoo'];
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$this->dispatcher->addListener('foo', $listener);
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$this->assertTrue($this->dispatcher->hasListeners());
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$this->assertTrue($this->dispatcher->hasListeners('foo'));
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$this->assertSame(0, $called);
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}
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public function testDispatchLazyListener()
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{
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$called = 0;
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$factory = function () use (&$called) {
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++$called;
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return new TestWithDispatcher();
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};
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$this->dispatcher->addListener('foo', [$factory, 'foo']);
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$this->assertSame(0, $called);
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$this->dispatcher->dispatch(new Event(), 'foo');
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$this->dispatcher->dispatch(new Event(), 'foo');
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$this->assertSame(1, $called);
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}
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public function testRemoveFindsLazyListeners()
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{
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$test = new TestWithDispatcher();
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$factory = function () use ($test) { return $test; };
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$this->dispatcher->addListener('foo', [$factory, 'foo']);
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$this->assertTrue($this->dispatcher->hasListeners('foo'));
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$this->dispatcher->removeListener('foo', [$test, 'foo']);
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$this->assertFalse($this->dispatcher->hasListeners('foo'));
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$this->dispatcher->addListener('foo', [$test, 'foo']);
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$this->assertTrue($this->dispatcher->hasListeners('foo'));
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$this->dispatcher->removeListener('foo', [$factory, 'foo']);
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$this->assertFalse($this->dispatcher->hasListeners('foo'));
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}
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public function testPriorityFindsLazyListeners()
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{
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$test = new TestWithDispatcher();
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$factory = function () use ($test) { return $test; };
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$this->dispatcher->addListener('foo', [$factory, 'foo'], 3);
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$this->assertSame(3, $this->dispatcher->getListenerPriority('foo', [$test, 'foo']));
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$this->dispatcher->removeListener('foo', [$factory, 'foo']);
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$this->dispatcher->addListener('foo', [$test, 'foo'], 5);
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$this->assertSame(5, $this->dispatcher->getListenerPriority('foo', [$factory, 'foo']));
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}
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public function testGetLazyListeners()
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{
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$test = new TestWithDispatcher();
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$factory = function () use ($test) { return $test; };
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$this->dispatcher->addListener('foo', [$factory, 'foo'], 3);
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$this->assertSame([[$test, 'foo']], $this->dispatcher->getListeners('foo'));
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$this->dispatcher->removeListener('foo', [$test, 'foo']);
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$this->dispatcher->addListener('bar', [$factory, 'foo'], 3);
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$this->assertSame(['bar' => [[$test, 'foo']]], $this->dispatcher->getListeners());
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}
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public function testMutatingWhilePropagationIsStopped()
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{
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$testLoaded = false;
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$test = new TestEventListener();
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$this->dispatcher->addListener('foo', [$test, 'postFoo']);
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$this->dispatcher->addListener('foo', [function () use ($test, &$testLoaded) {
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$testLoaded = true;
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return $test;
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}, 'preFoo']);
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$this->dispatcher->dispatch(new Event(), 'foo');
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$this->assertTrue($test->postFooInvoked);
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$this->assertFalse($test->preFooInvoked);
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$this->assertsame(0, $this->dispatcher->getListenerPriority('foo', [$test, 'preFoo']));
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$test->preFoo(new Event());
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$this->dispatcher->dispatch(new Event(), 'foo');
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$this->assertTrue($testLoaded);
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}
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}
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class CallableClass
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{
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public function __invoke()
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{
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}
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}
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class TestEventListener
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{
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public $preFooInvoked = false;
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public $postFooInvoked = false;
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/* Listener methods */
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public function preFoo($e)
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{
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$this->preFooInvoked = true;
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}
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public function postFoo($e)
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{
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$this->postFooInvoked = true;
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if (!$this->preFooInvoked) {
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$e->stopPropagation();
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}
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}
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}
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class TestWithDispatcher
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{
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public $name;
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public $dispatcher;
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public function foo($e, $name, $dispatcher)
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{
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$this->name = $name;
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$this->dispatcher = $dispatcher;
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}
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}
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class TestEventSubscriber implements EventSubscriberInterface
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{
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public static function getSubscribedEvents()
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{
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return ['pre.foo' => 'preFoo', 'post.foo' => 'postFoo'];
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}
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}
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class TestEventSubscriberWithPriorities implements EventSubscriberInterface
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{
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public static function getSubscribedEvents()
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{
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return [
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'pre.foo' => ['preFoo', 10],
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'post.foo' => ['postFoo'],
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];
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}
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}
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class TestEventSubscriberWithMultipleListeners implements EventSubscriberInterface
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{
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public static function getSubscribedEvents()
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{
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return ['pre.foo' => [
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['preFoo1'],
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['preFoo2', 10],
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]];
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}
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}
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