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/Exception/HttpExceptionTest.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace Symfony\Component\HttpKernel\Tests\Exception;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpKernel\Exception\HttpException;
+
+class HttpExceptionTest extends TestCase
+{
+    public function headerDataProvider()
+    {
+        return [
+            [['X-Test' => 'Test']],
+            [['X-Test' => 1]],
+            [
+                [
+                    ['X-Test' => 'Test'],
+                    ['X-Test-2' => 'Test-2'],
+                ],
+            ],
+        ];
+    }
+
+    public function testHeadersDefault()
+    {
+        $exception = $this->createException();
+        $this->assertSame([], $exception->getHeaders());
+    }
+
+    /**
+     * @dataProvider headerDataProvider
+     */
+    public function testHeadersConstructor($headers)
+    {
+        $exception = new HttpException(200, null, null, $headers);
+        $this->assertSame($headers, $exception->getHeaders());
+    }
+
+    /**
+     * @dataProvider headerDataProvider
+     */
+    public function testHeadersSetter($headers)
+    {
+        $exception = $this->createException();
+        $exception->setHeaders($headers);
+        $this->assertSame($headers, $exception->getHeaders());
+    }
+
+    protected function createException()
+    {
+        return new HttpException(200);
+    }
+}