Add Composer autoloading functions and PHPStan for testing

vendor/symfony/contracts/Tests/Service/ServiceLocatorTest.php

@@ -0,0 +1,94 @@
+<?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\Contracts\Tests\Service;
+
+use PHPUnit\Framework\TestCase;
+use Psr\Container\ContainerInterface;
+use Symfony\Contracts\Service\ServiceLocatorTrait;
+
+class ServiceLocatorTest extends TestCase
+{
+    public function getServiceLocator(array $factories)
+    {
+        return new class($factories) implements ContainerInterface {
+            use ServiceLocatorTrait;
+        };
+    }
+
+    public function testHas()
+    {
+        $locator = $this->getServiceLocator(array(
+            'foo' => function () { return 'bar'; },
+            'bar' => function () { return 'baz'; },
+            function () { return 'dummy'; },
+        ));
+
+        $this->assertTrue($locator->has('foo'));
+        $this->assertTrue($locator->has('bar'));
+        $this->assertFalse($locator->has('dummy'));
+    }
+
+    public function testGet()
+    {
+        $locator = $this->getServiceLocator(array(
+            'foo' => function () { return 'bar'; },
+            'bar' => function () { return 'baz'; },
+        ));
+
+        $this->assertSame('bar', $locator->get('foo'));
+        $this->assertSame('baz', $locator->get('bar'));
+    }
+
+    public function testGetDoesNotMemoize()
+    {
+        $i = 0;
+        $locator = $this->getServiceLocator(array(
+            'foo' => function () use (&$i) {
+                ++$i;
+
+                return 'bar';
+            },
+        ));
+
+        $this->assertSame('bar', $locator->get('foo'));
+        $this->assertSame('bar', $locator->get('foo'));
+        $this->assertSame(2, $i);
+    }
+
+    /**
+     * @expectedException        \Psr\Container\NotFoundExceptionInterface
+     * @expectedExceptionMessage The service "foo" has a dependency on a non-existent service "bar". This locator only knows about the "foo" service.
+     */
+    public function testThrowsOnUndefinedInternalService()
+    {
+        $locator = $this->getServiceLocator(array(
+            'foo' => function () use (&$locator) { return $locator->get('bar'); },
+        ));
+
+        $locator->get('foo');
+    }
+
+    /**
+     * @expectedException        \Psr\Container\ContainerExceptionInterface
+     * @expectedExceptionMessage Circular reference detected for service "bar", path: "bar -> baz -> bar".
+     */
+    public function testThrowsOnCircularReference()
+    {
+        $locator = $this->getServiceLocator(array(
+            'foo' => function () use (&$locator) { return $locator->get('bar'); },
+            'bar' => function () use (&$locator) { return $locator->get('baz'); },
+            'baz' => function () use (&$locator) { return $locator->get('bar'); },
+        ));
+
+        $locator->get('foo');
+    }
+}