Added PHPUnit 5 and 6 support

Author: carusogabriel

composer.json

@@ -9,7 +9,7 @@
         "php": ">=5.4.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.8.35"
+        "phpunit/phpunit": "~4.8.35 || ~5.7 || ~6.4"
     },
     "autoload": {
         "psr-4": {

tests/FulfilledPromiseTest.php

@@ -37,11 +37,12 @@ public function getPromiseTestAdapter(callable $canceller = null)
         ]);
     }
 
-    /** @test */
+    /**
+     * @test
+     * @expectedException InvalidArgumentException
+     */
     public function shouldThrowExceptionIfConstructedWithAPromise()
     {
-        $this->setExpectedException('\InvalidArgumentException');
-
         return new FulfilledPromise(new FulfilledPromise());
     }
 }

tests/Internal/CancellationQueueTest.php

@@ -74,11 +74,13 @@ public function doesNotCallCancelTwiceWhenStartedTwice()
         $cancellationQueue();
     }
 
-    /** @test */
+    /**
+     * @test
+     * @expectedException Exception
+     * @expectedExceptionMessage test
+     */
     public function rethrowsExceptionsThrownFromCancel()
     {
-        $this->setExpectedException('\Exception', 'test');
-
         $mock = $this->createCallableMock();
         $mock
             ->expects($this->once())

tests/Internal/QueueTest.php

@@ -29,11 +29,13 @@ public function excutesNestedEnqueuedTasks()
         $queue->enqueue($task);
     }
 
-    /** @test */
+    /**
+     * @test
+     * @expectedException Exception
+     * @expectedException test
+     */
     public function rethrowsExceptionsThrownFromTasks()
     {
-        $this->setExpectedException('\Exception', 'test');
-
         $mock = $this->createCallableMock();
         $mock
             ->expects($this->once())

tests/RejectedPromiseTest.php

@@ -37,11 +37,12 @@ public function getPromiseTestAdapter(callable $canceller = null)
         ]);
     }
 
-    /** @test */
+    /**
+     * @test
+     * @expectedException InvalidArgumentException
+     */
     public function shouldThrowExceptionIfConstructedWithAPromise()
     {
-        $this->setExpectedException('\InvalidArgumentException');
-
         return new RejectedPromise(new RejectedPromise());
     }
 }