added some more tests (#1835)

tests/Saml/SamlAuthTest.php

@@ -0,0 +1,33 @@
+<?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\Saml;
+
+use App\Tests\Mocks\Saml\SamlAuthFactory;
+use OneLogin\Saml2\Utils;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \App\Saml\SamlAuth
+ */
+class SamlAuthTest extends TestCase
+{
+    public function testCreateToken()
+    {
+        $previous = Utils::getProxyVars();
+        self::assertFalse($previous);
+
+        $sut = (new SamlAuthFactory($this))->create(null, true);
+
+        $current = Utils::getProxyVars();
+        self::assertTrue($current);
+
+        Utils::setProxyVars($previous);
+    }
+}