use codecov for code coverage (#833)

tests/Mocks/AbstractMockFactory.php

@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Tests\Mocks;
+
+use PHPUnit\Framework\MockObject\MockBuilder;
+use PHPUnit\Framework\TestCase;
+
+abstract class AbstractMockFactory
+{
+    /**
+     * @var TestCase
+     */
+    protected $testCase;
+
+    public function __construct(TestCase $testCase)
+    {
+        $this->testCase = $testCase;
+    }
+
+    protected function getMockBuilder(string $className): MockBuilder
+    {
+        return new MockBuilder($this->testCase, $className);
+    }
+}