[Cache] Don't clear system caches on cache:clear

Author: nicolas-grekas

Tests/Functional/CachePoolsTest.php

@@ -88,10 +88,6 @@ private function doTestCachePools($options, $adapterClass)
         $pool2 = $container->get('cache.pool2');
         $pool2->save($item);
 
-        $container->get('cache_clearer.alias')->clear($container->getParameter('kernel.cache_dir'));
-        $item = $pool1->getItem($key);
-        $this->assertFalse($item->isHit());
-
         $item = $pool2->getItem($key);
         $this->assertTrue($item->isHit());
 

Tests/Functional/ContainerDebugCommandTest.php

@@ -139,14 +139,18 @@ public function testTagsPartialSearch()
         $tester->setInputs(['0']);
         $tester->run(['command' => 'debug:container', '--tag' => 'kernel.'], ['decorated' => false]);
 
-        $this->assertStringContainsString('Select one of the following tags to display its information', $tester->getDisplay());
-        $this->assertStringContainsString('[0] kernel.cache_clearer', $tester->getDisplay());
-        $this->assertStringContainsString('[1] kernel.cache_warmer', $tester->getDisplay());
-        $this->assertStringContainsString('[2] kernel.event_subscriber', $tester->getDisplay());
-        $this->assertStringContainsString('[3] kernel.fragment_renderer', $tester->getDisplay());
-        $this->assertStringContainsString('[4] kernel.locale_aware', $tester->getDisplay());
-        $this->assertStringContainsString('[5] kernel.reset', $tester->getDisplay());
-        $this->assertStringContainsString('Symfony Container Services Tagged with "kernel.cache_clearer" Tag', $tester->getDisplay());
+        $this->assertStringMatchesFormat(<<<EOTXT
+
+             Select one of the following tags to display its information:
+            %A
+              [%d] kernel.reset
+            %A
+
+            Symfony Container Services Tagged with "kernel.%a" Tag
+            %A
+            EOTXT,
+            $tester->getDisplay()
+        );
     }
 
     public function testDescribeEnvVars()

Tests/Functional/app/CachePools/default.yml

@@ -1,7 +1,2 @@
 imports:
     - { resource: ../config/default.yml }
-
-services:
-    cache_clearer.alias:
-        alias: cache_clearer
-        public: true