function ContainerAwareEventDispatcherTest::testDispatchByPriority

File

core/tests/Drupal/Tests/Component/EventDispatcher/ContainerAwareEventDispatcherTest.php, line 348

Class

ContainerAwareEventDispatcherTest

Unit tests for the ContainerAwareEventDispatcher.

Namespace

Code

public function testDispatchByPriority() {
    $invoked = [];
    $listener1 = function () use (&$invoked) {
        $invoked[] = '1';
    };
    $listener2 = function () use (&$invoked) {
        $invoked[] = '2';
    };
    $listener3 = function () use (&$invoked) {
        $invoked[] = '3';
    };
    $this->dispatcher
        ->addListener('pre.foo', $listener1, -10);
    $this->dispatcher
        ->addListener('pre.foo', $listener2);
    $this->dispatcher
        ->addListener('pre.foo', $listener3, 10);
    $this->dispatcher
        ->dispatch(new Event(), self::PRE_FOO);
    $this->assertEquals([
        '3',
        '2',
        '1',
    ], $invoked);
}