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diff --git a/vendor/symfony/browser-kit/Tests/HistoryTest.php b/vendor/symfony/browser-kit/Tests/HistoryTest.php
new file mode 100644
index 000000000..aa09b05b3
--- /dev/null
+++ b/vendor/symfony/browser-kit/Tests/HistoryTest.php
@@ -0,0 +1,102 @@
+<?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\BrowserKit\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\BrowserKit\History;
+use Symfony\Component\BrowserKit\Request;
+
+class HistoryTest extends TestCase
+{
+    public function testAdd()
+    {
+        $history = new History();
+        $history->add(new Request('http://www.example1.com/', 'get'));
+        $this->assertSame('http://www.example1.com/', $history->current()->getUri(), '->add() adds a request to the history');
+
+        $history->add(new Request('http://www.example2.com/', 'get'));
+        $this->assertSame('http://www.example2.com/', $history->current()->getUri(), '->add() adds a request to the history');
+
+        $history->add(new Request('http://www.example3.com/', 'get'));
+        $history->back();
+        $history->add(new Request('http://www.example4.com/', 'get'));
+        $this->assertSame('http://www.example4.com/', $history->current()->getUri(), '->add() adds a request to the history');
+
+        $history->back();
+        $this->assertSame('http://www.example2.com/', $history->current()->getUri(), '->add() adds a request to the history');
+    }
+
+    public function testClearIsEmpty()
+    {
+        $history = new History();
+        $history->add(new Request('http://www.example.com/', 'get'));
+
+        $this->assertFalse($history->isEmpty(), '->isEmpty() returns false if the history is not empty');
+
+        $history->clear();
+
+        $this->assertTrue($history->isEmpty(), '->isEmpty() true if the history is empty');
+    }
+
+    public function testCurrent()
+    {
+        $history = new History();
+
+        try {
+            $history->current();
+            $this->fail('->current() throws a \LogicException if the history is empty');
+        } catch (\Exception $e) {
+            $this->assertInstanceOf('LogicException', $e, '->current() throws a \LogicException if the history is empty');
+        }
+
+        $history->add(new Request('http://www.example.com/', 'get'));
+
+        $this->assertSame('http://www.example.com/', $history->current()->getUri(), '->current() returns the current request in the history');
+    }
+
+    public function testBack()
+    {
+        $history = new History();
+        $history->add(new Request('http://www.example.com/', 'get'));
+
+        try {
+            $history->back();
+            $this->fail('->back() throws a \LogicException if the history is already on the first page');
+        } catch (\Exception $e) {
+            $this->assertInstanceOf('LogicException', $e, '->current() throws a \LogicException if the history is already on the first page');
+        }
+
+        $history->add(new Request('http://www.example1.com/', 'get'));
+        $history->back();
+
+        $this->assertSame('http://www.example.com/', $history->current()->getUri(), '->back() returns the previous request in the history');
+    }
+
+    public function testForward()
+    {
+        $history = new History();
+        $history->add(new Request('http://www.example.com/', 'get'));
+        $history->add(new Request('http://www.example1.com/', 'get'));
+
+        try {
+            $history->forward();
+            $this->fail('->forward() throws a \LogicException if the history is already on the last page');
+        } catch (\Exception $e) {
+            $this->assertInstanceOf('LogicException', $e, '->forward() throws a \LogicException if the history is already on the last page');
+        }
+
+        $history->back();
+        $history->forward();
+
+        $this->assertSame('http://www.example1.com/', $history->current()->getUri(), '->forward() returns the next request in the history');
+    }
+}