Merge branch '3.4' into 4.3

* 3.4:
  Use `::class` constants instead of `__NAMESPACE__` when possible

Author: nicolas-grekas

Tests/ControllerMetadata/ArgumentMetadataFactoryTest.php

@@ -48,7 +48,7 @@ public function testSignature2()
 
         $this->assertEquals([
             new ArgumentMetadata('foo', self::class, false, true, null, true),
-            new ArgumentMetadata('bar', __NAMESPACE__.'\FakeClassThatDoesNotExist', false, true, null, true),
+            new ArgumentMetadata('bar', FakeClassThatDoesNotExist::class, false, true, null, true),
             new ArgumentMetadata('baz', 'Fake\ImportedAndFake', false, true, null, true),
         ], $arguments);
     }
@@ -58,7 +58,7 @@ public function testSignature3()
         $arguments = $this->factory->createArgumentMetadata([$this, 'signature3']);
 
         $this->assertEquals([
-            new ArgumentMetadata('bar', __NAMESPACE__.'\FakeClassThatDoesNotExist', false, false, null),
+            new ArgumentMetadata('bar', FakeClassThatDoesNotExist::class, false, false, null),
             new ArgumentMetadata('baz', 'Fake\ImportedAndFake', false, false, null),
         ], $arguments);
     }

Tests/DataCollector/RequestDataCollectorTest.php

@@ -99,7 +99,7 @@ public function provideControllerCallables()
                 '"Regular" callable',
                 [$this, 'testControllerInspection'],
                 [
-                    'class' => __NAMESPACE__.'\RequestDataCollectorTest',
+                    'class' => RequestDataCollectorTest::class,
                     'method' => 'testControllerInspection',
                     'file' => __FILE__,
                     'line' => $r1->getStartLine(),