Add tests on the ContainerBag

src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ContainerBagTest.php

@@ -0,0 +1,65 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Tests\ParameterBag;
+
+use PHPUnit\Framework\TestCase;
+use Psr\Container\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\ParameterBag\ContainerBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ContainerBagInterface;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
+
+class ContainerBagTest extends TestCase
+{
+    /** @var ParameterBag */
+    private $parameterBag;
+    /** @var ContainerBag */
+    private $containerBag;
+
+    public function setUp()
+    {
+        $this->parameterBag = new ParameterBag(array('foo' => 'value'));
+        $this->containerBag = new ContainerBag(new Container($this->parameterBag));
+    }
+
+    public function testGetAllParameters()
+    {
+        $this->assertSame(array('foo' => 'value'), $this->containerBag->all());
+    }
+
+    public function testHasAParameter()
+    {
+        $this->assertTrue($this->containerBag->has('foo'));
+        $this->assertFalse($this->containerBag->has('bar'));
+    }
+
+    public function testGetParameter()
+    {
+        $this->assertSame('value', $this->containerBag->get('foo'));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\DependencyInjection\Exception\InvalidArgumentException
+     */
+    public function testGetParameterNotFound()
+    {
+        $this->containerBag->get('bar');
+    }
+
+    public function testInstanceOf()
+    {
+        $this->assertInstanceOf(FrozenParameterBag::class, $this->containerBag);
+        $this->assertInstanceOf(ContainerBagInterface::class, $this->containerBag);
+        $this->assertInstanceOf(ContainerInterface::class, $this->containerBag);
+    }
+}