LazyListenerTest.php

<?php
/**
 * @see       https://github.com/phly/phly-event-dispatcher for the canonical source repository
 * @copyright Copyright (c) 2018-2019 Matthew Weier O'Phinney (https:/mwop.net)
 * @license   https://github.com/phly/phly-event-dispatcher/blob/master/LICENSE.md New BSD License
 */

declare(strict_types=1);

namespace PhlyTest\EventDispatcher;

use Phly\EventDispatcher\Exception\InvalidListenerException;
use Phly\EventDispatcher\LazyListener;
use PHPUnit\Framework\TestCase;
use Prophecy\PhpUnit\ProphecyTrait;
use Psr\Container\ContainerInterface;

class LazyListenerTest extends TestCase
{
    use ProphecyTrait;

    public function setUp(): void
    {
        $this->event = new TestAsset\TestEvent();
        $this->container = $this->prophesize(ContainerInterface::class);
    }

    public function testRaisesExceptionIfServiceReturnedIsNeitherAnObjectNorCallable(): void
    {
        $this->container->get('LazyService')->willReturn('not-callable');
        $lazyListener = new LazyListener($this->container->reveal(), 'LazyService');

        $this->expectException(InvalidListenerException::class);
        $lazyListener($this->event);
    }

    public function testInvokesNonObjectCallableListenerReturnedByContainer(): void
    {
        $this->container->get('LazyService')->willReturn(__NAMESPACE__ . '\TestAsset\listenerFunction');
        $lazyListener = new LazyListener($this->container->reveal(), 'LazyService');

        $this->assertNull($lazyListener($this->event));
    }

    public function testRaisesExceptionIfObjectServiceReturnedIsNotCallableAndNoMethodProvided(): void
    {
        $this->container->get('LazyService')->willReturn((object) []);
        $lazyListener = new LazyListener($this->container->reveal(), 'LazyService');

        $this->expectException(InvalidListenerException::class);
        $lazyListener($this->event);
    }

    public function testInvokesCallableListenerReturnedByContainerWhenNoMethodProvided(): void
    {
        $this->container->get('LazyService')->willReturn(new TestAsset\Listener());
        $lazyListener = new LazyListener($this->container->reveal(), 'LazyService');

        $this->assertNull($lazyListener($this->event));
    }

    public function testRaisesExceptionIfObjectServiceReturnedIsNotCallableViaMethodProvided(): void
    {
        $this->container->get('LazyService')->willReturn(new TestAsset\Listener());
        $lazyListener = new LazyListener($this->container->reveal(), 'LazyService', 'not-a-real-method');

        $this->expectException(InvalidListenerException::class);
        $lazyListener($this->event);
    }

    public function testInvokesMethodOnObjectListenerReturnedByContainer(): void
    {
        $this->container->get('LazyService')->willReturn(new TestAsset\Listener());
        $lazyListener = new LazyListener($this->container->reveal(), 'LazyService', 'onTest');

        $this->assertNull($lazyListener($this->event));
    }
}