Add psr/log compatibility

tests/Monolog/PsrLogCompatTest.php

@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of the Monolog package.
+ *
+ * (c) Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Monolog;
+
+use Monolog\Handler\TestHandler;
+use Monolog\Formatter\LineFormatter;
+use Monolog\Processor\PsrLogMessageProcessor;
+use Psr\Log\Test\LoggerInterfaceTest;
+
+class PsrLogCompatTest extends LoggerInterfaceTest
+{
+    private $handler;
+
+    public function getLogger()
+    {
+        $logger = new Logger('foo');
+        $logger->pushHandler($handler = new TestHandler);
+        $logger->pushProcessor(new PsrLogMessageProcessor);
+        $handler->setFormatter(new LineFormatter('%level_name% %message%'));
+
+        $this->handler = $handler;
+
+        return $logger;
+    }
+
+    public function getLogs()
+    {
+        $convert = function ($record) {
+            $lower = function ($match) {
+                return strtolower($match[0]);
+            };
+
+            return preg_replace_callback('{^[A-Z]+}', $lower, $record['formatted']);
+        };
+
+        return array_map($convert, $this->handler->getRecords());
+    }
+}