Added a unit test for Doctrine\DBAL\Logging\LoggerChain

tests/Doctrine/Tests/DBAL/Logging/LoggerChainTest.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\DBAL\Logging;
+
+use Doctrine\DBAL\Logging\LoggerChain;
+use Doctrine\DBAL\Logging\SQLLogger;
+use Doctrine\DBAL\ParameterType;
+use PHPUnit\Framework\TestCase;
+
+class LoggerChainTest extends TestCase
+{
+    public function testStartQuery() : void
+    {
+        $sql    = 'SELECT ?';
+        $params = [1];
+        $types  = [ParameterType::INTEGER];
+
+        $listener = $this->createChain('startQuery', $sql, $params, $types);
+        $listener->startQuery($sql, $params, $types);
+    }
+
+    public function testStopQuery() : void
+    {
+        $listener = $this->createChain('stopQuery');
+        $listener->stopQuery();
+    }
+
+    /**
+     * @param mixed ...$args
+     */
+    private function createChain(string $method, ...$args) : LoggerChain
+    {
+        $chain = new LoggerChain([
+            $this->createLogger($method, ...$args),
+        ]);
+
+        $chain->addLogger($this->createLogger($method, ...$args));
+
+        return $chain;
+    }
+
+    /**
+     * @param mixed ...$args
+     */
+    private function createLogger(string $method, ...$args) : SQLLogger
+    {
+        $logger = $this->createMock(SQLLogger::class);
+        $logger->expects($this->once())
+            ->method($method)
+            ->with(...$args);
+
+        return $logger;
+    }
+}