Improve PHP 8.4+ support by avoiding implicitly nullable types

composer.json

@@ -22,8 +22,8 @@
     },
     "require": {
         "php": ">=5.3",
-        "react/event-loop": "^1.2",
-        "react/datagram": "~1.0"
+        "react/datagram": "^1.10",
+        "react/event-loop": "^1.2"
     },
     "require-dev": {
         "clue/hexdump": "0.2.*",

src/Factory.php

@@ -15,7 +15,7 @@ class Factory
 
     /**
      * The `Factory` is responsible for creating your [`SocketInterface`](#socketinterface) instances.
-     * 
+     *
      * This class takes an optional `LoopInterface|null $loop` parameter that can be used to
      * pass the event loop instance to use for this object. You can use a `null` value
      * here in order to use the [default loop](https://github.com/reactphp/event-loop#loop).
@@ -29,8 +29,12 @@ class Factory
      *
      * @param LoopInterface $loop
      */
-    public function __construct(LoopInterface $loop = null)
+    public function __construct($loop = null)
     {
+        if ($loop !== null && !$loop instanceof LoopInterface) { // manual type check to support legacy PHP < 7.1
+            throw new \InvalidArgumentException('Argument #1 ($loop) expected null|React\EventLoop\LoopInterface');
+        }
+
         $this->loop = $loop ?: Loop::get();
     }
 

tests/FunctionalTest.php

@@ -57,15 +57,21 @@ public function testMultipleReceivers()
 
         $this->loop->run();
     }
-    
+
     public function testConstructWithoutLoopAssignsLoopAutomatically()
     {
         $factory = new Factory();
-        
+
         $ref = new \ReflectionProperty($factory, 'loop');
         $ref->setAccessible(true);
         $loop = $ref->getValue($factory);
-        
+
         $this->assertInstanceOf('React\EventLoop\LoopInterface', $loop);
     }
+
+    public function testCtorThrowsForInvalidLoop()
+    {
+        $this->setExpectedException('InvalidArgumentException', 'Argument #1 ($loop) expected null|React\EventLoop\LoopInterface');
+        new Factory('loop');
+    }
 }

tests/TestCase.php

@@ -41,4 +41,21 @@ protected function createCallableMock()
     {
         return $this->getMockBuilder('stdClass')->setMethods(array('__invoke'))->getMock();
     }
+
+    public function setExpectedException($exception, $exceptionMessage = '', $exceptionCode = null)
+    {
+        if (method_exists($this, 'expectException')) {
+            // PHPUnit 5.2+
+            $this->expectException($exception);
+            if ($exceptionMessage !== '') {
+                $this->expectExceptionMessage($exceptionMessage);
+            }
+            if ($exceptionCode !== null) {
+                $this->expectExceptionCode($exceptionCode);
+            }
+        } else {
+            // legacy PHPUnit
+            parent::setExpectedException($exception, $exceptionMessage, $exceptionCode);
+        }
+    }
 }