N°2651 rollback gitignore for lib tests dirs

Too dangerous ! We'll work properly on this but for 2.8

lib/symfony/http-kernel/Tests/CacheClearer/Psr6CacheClearerTest.php

@@ -0,0 +1,67 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Tests\CacheClearer;
+
+use PHPUnit\Framework\TestCase;
+use Psr\Cache\CacheItemPoolInterface;
+use Symfony\Component\HttpKernel\CacheClearer\Psr6CacheClearer;
+
+class Psr6CacheClearerTest extends TestCase
+{
+    public function testClearPoolsInjectedInConstructor()
+    {
+        $pool = $this->getMockBuilder(CacheItemPoolInterface::class)->getMock();
+        $pool
+            ->expects($this->once())
+            ->method('clear');
+
+        (new Psr6CacheClearer(['pool' => $pool]))->clear('');
+    }
+
+    public function testClearPool()
+    {
+        $pool = $this->getMockBuilder(CacheItemPoolInterface::class)->getMock();
+        $pool
+            ->expects($this->once())
+            ->method('clear');
+
+        (new Psr6CacheClearer(['pool' => $pool]))->clearPool('pool');
+    }
+
+    public function testClearPoolThrowsExceptionOnUnreferencedPool()
+    {
+        $this->expectException('InvalidArgumentException');
+        $this->expectExceptionMessage('Cache pool not found: unknown');
+        (new Psr6CacheClearer())->clearPool('unknown');
+    }
+
+    /**
+     * @group legacy
+     * @expectedDeprecation The Symfony\Component\HttpKernel\CacheClearer\Psr6CacheClearer::addPool() method is deprecated since Symfony 3.3 and will be removed in 4.0. Pass an array of pools indexed by name to the constructor instead.
+     */
+    public function testClearPoolsInjectedByAdder()
+    {
+        $pool1 = $this->getMockBuilder(CacheItemPoolInterface::class)->getMock();
+        $pool1
+            ->expects($this->once())
+            ->method('clear');
+
+        $pool2 = $this->getMockBuilder(CacheItemPoolInterface::class)->getMock();
+        $pool2
+            ->expects($this->once())
+            ->method('clear');
+
+        $clearer = new Psr6CacheClearer(['pool1' => $pool1]);
+        $clearer->addPool($pool2);
+        $clearer->clear('');
+    }
+}