Use willReturn() instead of will(returnValue()).

Author: derrabus

Tests/ImmutableEventDispatcherTest.php

@@ -43,7 +43,7 @@ public function testDispatchDelegates()
         $this->innerDispatcher->expects($this->once())
             ->method('dispatch')
             ->with('event', $event)
-            ->will($this->returnValue('result'));
+            ->willReturn('result');
 
         $this->assertSame('result', $this->dispatcher->dispatch('event', $event));
     }
@@ -53,7 +53,7 @@ public function testGetListenersDelegates()
         $this->innerDispatcher->expects($this->once())
             ->method('getListeners')
             ->with('event')
-            ->will($this->returnValue('result'));
+            ->willReturn('result');
 
         $this->assertSame('result', $this->dispatcher->getListeners('event'));
     }
@@ -63,7 +63,7 @@ public function testHasListenersDelegates()
         $this->innerDispatcher->expects($this->once())
             ->method('hasListeners')
             ->with('event')
-            ->will($this->returnValue('result'));
+            ->willReturn('result');
 
         $this->assertSame('result', $this->dispatcher->hasListeners('event'));
     }