diff --git a/Psr/Log/Test/TestLogger.php b/Psr/Log/Test/TestLogger.php
new file mode 100644
index 0000000..0cdffe4
--- /dev/null
+++ b/Psr/Log/Test/TestLogger.php
@@ -0,0 +1,146 @@
+<?php
+
+namespace Psr\Log\Test;
+
+use Psr\Log\AbstractLogger;
+
+/**
+ * Used for testing purposes.
+ *
+ * It records all records and gives you access to them for verification.
+ *
+ * @method bool hasEmergency($record)
+ * @method bool hasAlert($record)
+ * @method bool hasCritical($record)
+ * @method bool hasError($record)
+ * @method bool hasWarning($record)
+ * @method bool hasNotice($record)
+ * @method bool hasInfo($record)
+ * @method bool hasDebug($record)
+ *
+ * @method bool hasEmergencyRecords()
+ * @method bool hasAlertRecords()
+ * @method bool hasCriticalRecords()
+ * @method bool hasErrorRecords()
+ * @method bool hasWarningRecords()
+ * @method bool hasNoticeRecords()
+ * @method bool hasInfoRecords()
+ * @method bool hasDebugRecords()
+ *
+ * @method bool hasEmergencyThatContains($message)
+ * @method bool hasAlertThatContains($message)
+ * @method bool hasCriticalThatContains($message)
+ * @method bool hasErrorThatContains($message)
+ * @method bool hasWarningThatContains($message)
+ * @method bool hasNoticeThatContains($message)
+ * @method bool hasInfoThatContains($message)
+ * @method bool hasDebugThatContains($message)
+ *
+ * @method bool hasEmergencyThatMatches($message)
+ * @method bool hasAlertThatMatches($message)
+ * @method bool hasCriticalThatMatches($message)
+ * @method bool hasErrorThatMatches($message)
+ * @method bool hasWarningThatMatches($message)
+ * @method bool hasNoticeThatMatches($message)
+ * @method bool hasInfoThatMatches($message)
+ * @method bool hasDebugThatMatches($message)
+ *
+ * @method bool hasEmergencyThatPasses($message)
+ * @method bool hasAlertThatPasses($message)
+ * @method bool hasCriticalThatPasses($message)
+ * @method bool hasErrorThatPasses($message)
+ * @method bool hasWarningThatPasses($message)
+ * @method bool hasNoticeThatPasses($message)
+ * @method bool hasInfoThatPasses($message)
+ * @method bool hasDebugThatPasses($message)
+ */
+class TestLogger extends AbstractLogger
+{
+    /**
+     * @var array
+     */
+    public $records = [];
+
+    public $recordsByLevel = [];
+
+    /**
+     * @inheritdoc
+     */
+    public function log($level, $message, array $context = [])
+    {
+        $record = [
+            'level' => $level,
+            'message' => $message,
+            'context' => $context,
+        ];
+
+        $this->recordsByLevel[$record['level']][] = $record;
+        $this->records[] = $record;
+    }
+
+    public function hasRecords($level)
+    {
+        return isset($this->recordsByLevel[$level]);
+    }
+
+    public function hasRecord($record, $level)
+    {
+        if (is_string($record)) {
+            $record = ['message' => $record];
+        }
+        return $this->hasRecordThatPasses(function ($rec) use ($record) {
+            if ($rec['message'] !== $record['message']) {
+                return false;
+            }
+            if (isset($record['context']) && $rec['context'] !== $record['context']) {
+                return false;
+            }
+            return true;
+        }, $level);
+    }
+
+    public function hasRecordThatContains($message, $level)
+    {
+        return $this->hasRecordThatPasses(function ($rec) use ($message) {
+            return strpos($rec['message'], $message) !== false;
+        }, $level);
+    }
+
+    public function hasRecordThatMatches($regex, $level)
+    {
+        return $this->hasRecordThatPasses(function ($rec) use ($regex) {
+            return preg_match($regex, $rec['message']) > 0;
+        }, $level);
+    }
+
+    public function hasRecordThatPasses(callable $predicate, $level)
+    {
+        if (!isset($this->recordsByLevel[$level])) {
+            return false;
+        }
+        foreach ($this->recordsByLevel[$level] as $i => $rec) {
+            if (call_user_func($predicate, $rec, $i)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public function __call($method, $args)
+    {
+        if (preg_match('/(.*)(Debug|Info|Notice|Warning|Error|Critical|Alert|Emergency)(.*)/', $method, $matches) > 0) {
+            $genericMethod = $matches[1] . ('Records' !== $matches[3] ? 'Record' : '') . $matches[3];
+            $level = strtolower($matches[2]);
+            if (method_exists($this, $genericMethod)) {
+                $args[] = $level;
+                return call_user_func_array([$this, $genericMethod], $args);
+            }
+        }
+        throw new \BadMethodCallException('Call to undefined method ' . get_class($this) . '::' . $method . '()');
+    }
+
+    public function reset()
+    {
+        $this->records = [];
+    }
+}