move logger handling to separate class

Tests/LoggerHandlerTest.php

@@ -0,0 +1,79 @@
+<?php
+
+/**
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * https://www.d3data.de
+ *
+ * @copyright (C) D3 Data Development (Inh. Thomas Dartsch)
+ * @author    D3 Data Development - Daniel Seifert <support@shopmodule.com>
+ * @link      https://www.oxidmodule.com
+ */
+
+declare(strict_types=1);
+
+namespace D3\LinkmobilityClient\Tests;
+
+use D3\LinkmobilityClient\LoggerHandler;
+use PHPUnit\Framework\MockObject\MockObject;
+use Psr\Log\AbstractLogger;
+use Psr\Log\LoggerInterface;
+use ReflectionException;
+
+class LoggerHandlerTest extends ApiTestCase
+{
+    /** @var LoggerHandler */
+    public $loggerHandler;
+
+    /**
+     * @return void
+     */
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->loggerHandler = new LoggerHandler();
+    }
+
+    /**
+     * @return void
+     */
+    public function tearDown(): void
+    {
+        parent::tearDown();
+
+        unset($this->loggerHandler);
+    }
+
+    /**
+     * @test
+     * @throws ReflectionException
+     */
+    public function testConstruct()
+    {
+        $this->assertInstanceOf(
+            LoggerInterface::class,
+            $this->callMethod($this->loggerHandler, 'getLogger')
+        );
+    }
+
+    /**
+     * @test
+     * @return void
+     * @throws ReflectionException
+     */
+    public function testLogger()
+    {
+        /** @var LoggerInterface|MockObject $loggerMock */
+        $loggerMock = $this->getMockBuilder(AbstractLogger::class)
+            ->onlyMethods(['debug', 'error', 'log'])
+            ->getMock();
+
+        $this->callMethod( $this->loggerHandler, 'setLogger', [ $loggerMock]);
+        $this->assertSame(
+            $loggerMock,
+            $this->callMethod( $this->loggerHandler, 'getLogger')
+        );
+    }
+}