added plugin screen (#671)

tests/Plugin/PluginTest.php

@@ -0,0 +1,48 @@
+<?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\Plugin;
+
+use App\Plugin\Plugin;
+use App\Plugin\PluginMetadata;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \App\Plugin\Plugin
+ */
+class PluginTest extends TestCase
+{
+    public function testEmptyObject()
+    {
+        $plugin = new Plugin();
+        $this->assertNull($plugin->getName());
+        $this->assertNull($plugin->getPath());
+        $this->assertNull($plugin->getMetadata());
+    }
+
+    public function testGetterAndSetter()
+    {
+        $metadata = new PluginMetadata();
+        $metadata
+            ->setDescription('foo')
+            ->setHomepage('http://www.example.com')
+            ->setVersion('13.7')
+            ->setKimaiVersion('1.1')
+        ;
+
+        $plugin = new Plugin();
+        $this->assertInstanceOf(Plugin::class, $plugin->setName('foo'));
+        $this->assertInstanceOf(Plugin::class, $plugin->setPath('bar'));
+        $this->assertInstanceOf(Plugin::class, $plugin->setMetadata($metadata));
+
+        $this->assertEquals('foo', $plugin->getName());
+        $this->assertEquals('bar', $plugin->getPath());
+        $this->assertSame($metadata, $plugin->getMetadata());
+    }
+}