Added Application unit test

tests/Unit/ApplicationTest.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Engelsystem\Test\Config;
+
+use Engelsystem\Application;
+use Engelsystem\Container\Container;
+use PHPUnit\Framework\TestCase;
+use Psr\Container\ContainerInterface;
+
+class ApplicationTest extends TestCase
+{
+    /**
+     * @covers       \Engelsystem\Application::__construct
+     * @covers       \Engelsystem\Application::registerBaseBindings
+     */
+    public function testConstructor()
+    {
+        $app = new Application();
+
+        $this->assertInstanceOf(Container::class, $app);
+        $this->assertInstanceOf(ContainerInterface::class, $app);
+        $this->assertSame($app, $app->get('app'));
+        $this->assertSame($app, $app->get('container'));
+        $this->assertSame($app, $app->get(Container::class));
+        $this->assertSame($app, $app->get(Application::class));
+        $this->assertSame($app, $app->get(ContainerInterface::class));
+        $this->assertSame($app, Container::getInstance());
+    }
+}