Use ::class keyword when possible

Author: fabpot

Tests/Fragment/FragmentHandlerTest.php

@@ -26,7 +26,7 @@ class FragmentHandlerTest extends TestCase
 
     protected function setUp(): void
     {
-        $this->requestStack = $this->getMockBuilder('Symfony\\Component\\HttpFoundation\\RequestStack')
+        $this->requestStack = $this->getMockBuilder(\Symfony\Component\HttpFoundation\RequestStack::class)
             ->disableOriginalConstructor()
             ->getMock()
         ;
@@ -39,14 +39,14 @@ protected function setUp(): void
 
     public function testRenderWhenRendererDoesNotExist()
     {
-        $this->expectException('InvalidArgumentException');
+        $this->expectException(\InvalidArgumentException::class);
         $handler = new FragmentHandler($this->requestStack);
         $handler->render('/', 'foo');
     }
 
     public function testRenderWithUnknownRenderer()
     {
-        $this->expectException('InvalidArgumentException');
+        $this->expectException(\InvalidArgumentException::class);
         $handler = $this->getHandler($this->returnValue(new Response('foo')));
 
         $handler->render('/', 'bar');
@@ -59,7 +59,7 @@ public function testDeliverWithUnsuccessfulResponse()
             $handler->render('/', 'foo');
             $this->fail('->render() throws a \RuntimeException exception if response is not successful');
         } catch (\Exception $e) {
-            $this->assertInstanceOf('\RuntimeException', $e);
+            $this->assertInstanceOf(\RuntimeException::class, $e);
             $this->assertEquals(0, $e->getCode());
             $this->assertEquals('Error when rendering "http://localhost/" (Status code is 404).', $e->getMessage());
 
@@ -79,7 +79,7 @@ public function testRender()
 
     protected function getHandler($returnValue, $arguments = [])
     {
-        $renderer = $this->getMockBuilder('Symfony\Component\HttpKernel\Fragment\FragmentRendererInterface')->getMock();
+        $renderer = $this->getMockBuilder(\Symfony\Component\HttpKernel\Fragment\FragmentRendererInterface::class)->getMock();
         $renderer
             ->expects($this->any())
             ->method('getName')