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diff --git a/vendor/symfony/yaml/Tests/Command/LintCommandTest.php b/vendor/symfony/yaml/Tests/Command/LintCommandTest.php
new file mode 100644
index 000000000..ce6ad480c
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Command/LintCommandTest.php
@@ -0,0 +1,107 @@
+<?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\Yaml\Tests\Command;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Yaml\Command\LintCommand;
+use Symfony\Component\Console\Application;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Tester\CommandTester;
+
+/**
+ * Tests the YamlLintCommand.
+ *
+ * @author Robin Chalas <robin.chalas@gmail.com>
+ */
+class LintCommandTest extends TestCase
+{
+    private $files;
+
+    public function testLintCorrectFile()
+    {
+        $tester = $this->createCommandTester();
+        $filename = $this->createFile('foo: bar');
+
+        $ret = $tester->execute(array('filename' => $filename), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+
+        $this->assertEquals(0, $ret, 'Returns 0 in case of success');
+        $this->assertRegExp('/^\/\/ OK in /', trim($tester->getDisplay()));
+    }
+
+    public function testLintIncorrectFile()
+    {
+        $incorrectContent = '
+foo:
+bar';
+        $tester = $this->createCommandTester();
+        $filename = $this->createFile($incorrectContent);
+
+        $ret = $tester->execute(array('filename' => $filename), array('decorated' => false));
+
+        $this->assertEquals(1, $ret, 'Returns 1 in case of error');
+        $this->assertContains('Unable to parse at line 3 (near "bar").', trim($tester->getDisplay()));
+    }
+
+    /**
+     * @expectedException \RuntimeException
+     */
+    public function testLintFileNotReadable()
+    {
+        $tester = $this->createCommandTester();
+        $filename = $this->createFile('');
+        unlink($filename);
+
+        $ret = $tester->execute(array('filename' => $filename), array('decorated' => false));
+    }
+
+    /**
+     * @return string Path to the new file
+     */
+    private function createFile($content)
+    {
+        $filename = tempnam(sys_get_temp_dir().'/framework-yml-lint-test', 'sf-');
+        file_put_contents($filename, $content);
+
+        $this->files[] = $filename;
+
+        return $filename;
+    }
+
+    /**
+     * @return CommandTester
+     */
+    protected function createCommandTester()
+    {
+        $application = new Application();
+        $application->add(new LintCommand());
+        $command = $application->find('lint:yaml');
+
+        return new CommandTester($command);
+    }
+
+    protected function setUp()
+    {
+        $this->files = array();
+        @mkdir(sys_get_temp_dir().'/framework-yml-lint-test');
+    }
+
+    protected function tearDown()
+    {
+        foreach ($this->files as $file) {
+            if (file_exists($file)) {
+                unlink($file);
+            }
+        }
+
+        rmdir(sys_get_temp_dir().'/framework-yml-lint-test');
+    }
+}