Handle preg_quote changes for PHP 7.3 (#14)

* Add PHP 7.3 to Travis

* Prepare preg_replace() replacements by PHP version

PHP 7.3+ requires the pattern to expect preg_quote() to escape `#` characters in the event pattern.

.travis.yml

@@ -1,7 +1,30 @@
 language: php
+dist: trusty
+sudo: false
 
 php:
-  - 5.3
   - 5.4
+  - 5.5
+  - 5.6
+  - 7.0
+  - 7.1
+  - 7.2
+  - 7.3
 
-before_script: composer install --dev
+cache:
+  directories:
+    - ${HOME}/.composer/cache/files
+
+matrix:
+  fast_finish: true
+  include:
+    - php: 5.3
+      dist: precise
+      env: COMPOSER_FLAGS="--prefer-lowest"
+
+before_script:
+  - phpenv config-rm xdebug.ini
+  - composer update --no-interaction --no-progress --no-suggest ${COMPOSER_FLAGS}
+
+script:
+  - vendor/bin/phpunit -v

README.md

@@ -2,21 +2,36 @@
 
 [![Build Status](https://travis-ci.org/jmikola/WildcardEventDispatcher.png?branch=master)](https://travis-ci.org/jmikola/WildcardEventDispatcher)
 
-This library implements an event dispatcher, based on [Symfony2's interface][],
+This library implements an event dispatcher, based on [Symfony's interface][],
 with wildcard syntax inspired by AMQP topic exchanges. Listeners may be bound to
 a wildcard pattern and be notified if a dispatched event's name matches that
 pattern. Literal event name matching is still supported.
 
-If you are interested in using this library in a Symfony2 project, you may also
+If you are interested in using this library in a Symfony project, you may also
 want to take a look at the corresponding [bundle][].
 
-  [Symfony2's interface]: https://github.com/symfony/EventDispatcher
+  [Symfony's interface]: https://github.com/symfony/EventDispatcher
   [bundle]: https://github.com/jmikola/JmikolaWildcardEventDispatcherBundle
 
-## Usage ##
+## Installation
+
+The library is published as a [package][] and is installable via [Composer][]:
+
+```
+$ composer require jmikola/wildcard-event-dispatcher=~1.0
+```
+
+  [package]: https://packagist.org/packages/jmikola/wildcard-event-dispatcher
+  [Composer]: http://getcomposer.org/
+
+### Compatibility
+
+This library requires Symfony 2.3 or above.
+
+## Usage
 
 WildcardEventDispatcher implements EventDispatcherInterface and may be used as
-you would Symfony2's standard EventDispatcher:
+you would Symfony's standard EventDispatcher:
 
 ```php
 <?php
@@ -50,9 +65,9 @@ $dispatcher = new WildcardEventDispatcher(new EventDispatcher());
 
   [composes]: http://en.wikipedia.org/wiki/Object_composition
 
-## Wildcard Syntax ##
+## Wildcard Syntax
 
-### Single-word Wildcard ###
+### Single-word Wildcard
 
 Consider the scenario where the same listener is defined for multiple events,
 all of which share a common prefix:
@@ -90,7 +105,7 @@ and followed by another word. The matching of `core` alone may not make sense,
 but this is implemented in order to be consistent with AMQP. A trailing `*`
 after a non-empty sequence may match the preceding sequence sans `.*`.
 
-### Multi-word Wildcard ###
+### Multi-word Wildcard
 
 Suppose there was a `core` event in your application named `core.foo.bar`. The
 aforementioned `core.*` pattern would not catch this event. You could use:
@@ -130,7 +145,7 @@ $dispatcher = new WildcardEventDispatcher();
 $dispatcher->addListener('#', $allListener);
 ```
 
-### Additional Wildcard Documentation ###
+### Additional Wildcard Documentation
 
 When in doubt, the unit tests for `ListenerPattern` are a good resource for
 inferring how wildcards will be interpreted. This library aims to mimic the

composer.json

@@ -8,12 +8,19 @@
     "authors": [
         { "name": "Jeremy Mikola", "email": "jmikola@gmail.com" }
     ],
-    "minimum-stability": "dev",
     "require": {
         "php": ">=5.3.2",
-        "symfony/event-dispatcher": "~2.0"
+        "symfony/event-dispatcher": "^2.3 || ^3.0 || ^4.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^4.8.36 || ^6.4"
     },
     "autoload": {
         "psr-0": { "Jmikola": "src/" }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.1.x-dev"
+        }
     }
 }

src/Jmikola/WildcardEventDispatcher/LazyListenerPattern.php

@@ -15,7 +15,7 @@ class LazyListenerPattern extends ListenerPattern
      * @param string   $eventPattern
      * @param callback $listenerProvider
      * @param integer  $priority
-     * @throws InvalidArgumentException if the listener provider is not a callback
+     * @throws \InvalidArgumentException if the listener provider is not a callback
      */
     public function __construct($eventPattern, $listenerProvider, $priority = 0)
     {

src/Jmikola/WildcardEventDispatcher/ListenerPattern.php

@@ -12,18 +12,7 @@ class ListenerPattern
     protected $priority;
     protected $regex;
 
-    private static $replacements = array(
-        // Trailing single-wildcard with separator prefix
-        '/\\\\\.\\\\\*$/'     => '(?:\.\w+)?',
-        // Single-wildcard with separator prefix
-        '/\\\\\.\\\\\*/'      => '(?:\.\w+)',
-        // Single-wildcard without separator prefix
-        '/(?<!\\\\\.)\\\\\*/' => '(?:\w+)',
-        // Multi-wildcard with separator prefix
-        '/\\\\\.#/'           => '(?:\.\w+)*',
-        // Multi-wildcard without separator prefix
-        '/(?<!\\\\\.)#/'      => '(?:|\w+(?:\.\w+)*)',
-    );
+    private static $replacements;
 
     /**
      * Constructor.
@@ -110,10 +99,52 @@ class ListenerPattern
      */
     private function createRegex($eventPattern)
     {
+        $replacements = self::getReplacements();
+
         return sprintf('/^%s$/', preg_replace(
-            array_keys(self::$replacements),
-            array_values(self::$replacements),
+            array_keys($replacements),
+            array_values($replacements),
             preg_quote($eventPattern, '/')
         ));
     }
+
+    /**
+     * Returns preg_replace() replacements for preparing the event pattern.
+     *
+     * @return array
+     */
+    private static function getReplacements()
+    {
+        if (null !== self::$replacements) {
+            return self::$replacements;
+        }
+
+        self::$replacements = array(
+            // Trailing single-wildcard with separator prefix
+            '/\\\\\.\\\\\*$/'     => '(?:\.\w+)?',
+            // Single-wildcard with separator prefix
+            '/\\\\\.\\\\\*/'      => '(?:\.\w+)',
+            // Single-wildcard without separator prefix
+            '/(?<!\\\\\.)\\\\\*/' => '(?:\w+)',
+        );
+
+        // preg_quote() escapes `#` in PHP 7.3+
+        if (PHP_VERSION_ID >= 70300) {
+            self::$replacements += array(
+                // Multi-wildcard with separator prefix
+                '/\\\\\.\\\\\#/'      => '(?:\.\w+)*',
+                // Multi-wildcard without separator prefix
+                '/(?<!\\\\\.)\\\\\#/' => '(?:|\w+(?:\.\w+)*)',
+            );
+        } else {
+            self::$replacements += array(
+                // Multi-wildcard with separator prefix
+                '/\\\\\.#/'      => '(?:\.\w+)*',
+                // Multi-wildcard without separator prefix
+                '/(?<!\\\\\.)#/' => '(?:|\w+(?:\.\w+)*)',
+            );
+        }
+
+        return self::$replacements;
+    }
 }

src/Jmikola/WildcardEventDispatcher/WildcardEventDispatcher.php

@@ -16,7 +16,7 @@ class WildcardEventDispatcher implements EventDispatcherInterface
     /**
      * Constructor.
      *
-     * If an EventDispatcherInterface is not provided , a new EventDispatcher
+     * If an EventDispatcherInterface is not provided, a new EventDispatcher
      * will be composed.
      *
      * @param EventDispatcherInterface $dispatcher
@@ -195,4 +195,22 @@ class WildcardEventDispatcher implements EventDispatcherInterface
             }
         }
     }
+
+    /**
+     * @see EventDispatcherInterface::getListenerPriority()
+     * @throws \InvalidArgumentException if $eventName contains a wildcard pattern
+     * @throws \BadMethodCallException if this method is not implemented on the composed EventDispatcher
+     */
+    public function getListenerPriority($eventName, $listener)
+    {
+        if ($this->hasWildcards($eventName)) {
+            throw new \InvalidArgumentException('Wildcard patterns are not supported');
+        }
+
+        if ( ! method_exists($this->dispatcher, 'getListenerPriority')) {
+            throw new \BadMethodCallException('getListenerPriority() is not implemented');
+        }
+
+        return $this->dispatcher->getListenerPriority($eventName, $listener);
+    }
 }

tests/Jmikola/Tests/WildcardEventDispatcher/LazyListenerPatternTest.php

@@ -3,8 +3,9 @@
 namespace Jmikola\Tests\WildcardEventDispatcher;
 
 use Jmikola\WildcardEventDispatcher\LazyListenerPattern;
+use PHPUnit\Framework\TestCase;
 
-class LazyListenerPatternTest extends \PHPUnit_Framework_TestCase
+class LazyListenerPatternTest extends TestCase
 {
     /**
      * @expectedException InvalidArgumentException

tests/Jmikola/Tests/WildcardEventDispatcher/ListenerPatternTest.php

@@ -3,8 +3,9 @@
 namespace Jmikola\Tests\WildcardEventDispatcher;
 
 use Jmikola\WildcardEventDispatcher\ListenerPattern;
+use PHPUnit\Framework\TestCase;
 
-class ListenerPatternTest extends \PHPUnit_Framework_TestCase
+class ListenerPatternTest extends TestCase
 {
     /**
      * @dataProvider providePatternsAndMatches
@@ -86,6 +87,6 @@ class ListenerPatternTest extends \PHPUnit_Framework_TestCase
 
     private function getMockEventDispatcher()
     {
-        return $this->getMock('Symfony\Component\EventDispatcher\EventDispatcherInterface');
+        return $this->getMockBuilder('Symfony\Component\EventDispatcher\EventDispatcherInterface')->getMock();
     }
 }

tests/Jmikola/Tests/WildcardEventDispatcher/WildcardEventDispatcherFunctionalTest.php

@@ -4,8 +4,9 @@ namespace Jmikola\Tests\WildcardEventDispatcher;
 
 use Jmikola\WildcardEventDispatcher\WildcardEventDispatcher;
 use Symfony\Component\EventDispatcher\Event;
+use PHPUnit\Framework\TestCase;
 
-class WildcardEventDispatcherFunctionalTest extends \PHPUnit_Framework_TestCase
+class WildcardEventDispatcherFunctionalTest extends TestCase
 {
     const coreRequest = 'core.request';
     const coreException = 'core.exception';
@@ -127,7 +128,7 @@ class WildcardEventDispatcherFunctionalTest extends \PHPUnit_Framework_TestCase
     private function assertNumberListenersAdded($expected, $eventName = null)
     {
         return isset($eventName)
-            ? $this->assertEquals($expected, count($this->dispatcher->getListeners($eventName)))
+            ? $this->assertCount($expected, $this->dispatcher->getListeners($eventName))
             : $this->assertEquals($expected, array_sum(array_map('count', $this->dispatcher->getListeners())));
     }
 }

tests/Jmikola/Tests/WildcardEventDispatcher/WildcardEventDispatcherTest.php

@@ -4,8 +4,9 @@ namespace Jmikola\Tests\WildcardEventDispatcher;
 
 use Jmikola\WildcardEventDispatcher\WildcardEventDispatcher;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use PHPUnit\Framework\TestCase;
 
-class EventDispatcherTest extends \PHPUnit_Framework_TestCase
+class EventDispatcherTest extends TestCase
 {
     private $dispatcher;
     private $innerDispatcher;
@@ -146,9 +147,43 @@ class EventDispatcherTest extends \PHPUnit_Framework_TestCase
         $this->dispatcher->removeSubscriber($subscriber);
     }
 
+    public function testGetListenerPriorityInvokesMethodOnInnerDispather()
+    {
+        if ( ! method_exists('Symfony\Component\EventDispatcher\EventDispatcherInterface', 'getListenerPriority')) {
+            $this->markTestSkipped('getListenerPriority() does not exist on EventDispatcherInterface');
+        }
+
+        $this->innerDispatcher->expects($this->once())
+            ->method('getListenerPriority')
+            ->with('core.request', 'callback')
+            ->will($this->returnValue(1));
+
+        $this->assertSame(1, $this->dispatcher->getListenerPriority('core.request', 'callback'));
+    }
+
+    /**
+     * @expectedException InvalidArgumentException
+     */
+    public function testGetListenerPriorityRequiresEventNameWithoutWildcards()
+    {
+        $this->dispatcher->getListenerPriority('core.*', 'callback');
+    }
+
+    /**
+     * @expectedException BadMethodCallException
+     */
+    public function testGetListenerPriorityRequiresMethodOnInnerDispather()
+    {
+        if (method_exists('Symfony\Component\EventDispatcher\EventDispatcherInterface', 'getListenerPriority')) {
+            $this->markTestSkipped('getListenerPriority() exists on EventDispatcherInterface');
+        }
+
+        $this->dispatcher->getListenerPriority('core.request', 'callback');
+    }
+
     private function getMockEventDispatcher()
     {
-        return $this->getMock('Symfony\Component\EventDispatcher\EventDispatcherInterface');
+        return $this->getMockBuilder('Symfony\Component\EventDispatcher\EventDispatcherInterface')->getMock();
     }
 }