Added UrlGenerator unit test

tests/Unit/Routing/UrlGeneratorTest.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Engelsystem\Test\Config;
+
+use Engelsystem\Application;
+use Engelsystem\Container\Container;
+use Engelsystem\Http\Request;
+use Engelsystem\Routing\UrlGenerator;
+use PHPUnit\Framework\TestCase;
+
+class UrlGeneratorTest extends TestCase
+{
+    public function provideLinksTo()
+    {
+        return [
+            ['/foo/path', '/foo/path', 'http://foo.bar/foo/path', [], 'http://foo.bar/foo/path'],
+            ['foo', '/foo', 'https://foo.bar/foo', [], 'https://foo.bar/foo'],
+            ['foo', '/foo', 'http://f.b/foo', ['test' => 'abc', 'bla' => 'foo'], 'http://f.b/foo?test=abc&bla=foo'],
+        ];
+    }
+
+    /**
+     * @dataProvider provideLinksTo
+     * @covers       \Engelsystem\Routing\UrlGenerator::to
+     *
+     * @param string   $path
+     * @param string   $willReturn
+     * @param string   $urlToPath
+     * @param string[] $arguments
+     * @param string   $expectedUrl
+     */
+    public function testTo($urlToPath, $path, $willReturn, $arguments, $expectedUrl)
+    {
+        $app = new Container();
+        Application::setInstance($app);
+
+        $request = $this->getMockBuilder(Request::class)
+            ->getMock();
+
+        $request->expects($this->once())
+            ->method('getUriForPath')
+            ->with($path)
+            ->willReturn($willReturn);
+
+        $app->instance('request', $request);
+
+        $url = UrlGenerator::to($urlToPath, $arguments);
+        $this->assertEquals($expectedUrl, $url);
+    }
+}