minor #21868 [Form] backport DependencyInjectionExtension tests (xabbuh)

This PR was merged into the 2.7 branch.

Discussion
----------

[Form] backport DependencyInjectionExtension tests

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
-------

97361f1815 [Form] backport DependencyInjectionExtension tests

src/Symfony/Component/Form/Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php

@@ -0,0 +1,89 @@
+<?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\Form\Tests\Extension\DependencyInjection;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
+use Symfony\Component\Form\Extension\DependencyInjection\DependencyInjectionExtension;
+
+class DependencyInjectionExtensionTest extends TestCase
+{
+    public function testGetTypeExtensions()
+    {
+        $container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerInterface')->getMock();
+
+        $services = array(
+            'extension1' => $typeExtension1 = $this->createFormTypeExtensionMock('test'),
+            'extension2' => $typeExtension2 = $this->createFormTypeExtensionMock('test'),
+            'extension3' => $typeExtension3 = $this->createFormTypeExtensionMock('other'),
+        );
+
+        $container->expects($this->any())
+            ->method('get')
+            ->willReturnCallback(function ($id) use ($services) {
+                if (isset($services[$id])) {
+                    return $services[$id];
+                }
+
+                throw new ServiceNotFoundException($id);
+            });
+
+        $extension = new DependencyInjectionExtension($container, array(), array('test' => array('extension1', 'extension2'), 'other' => array('extension3')), array());
+
+        $this->assertTrue($extension->hasTypeExtensions('test'));
+        $this->assertFalse($extension->hasTypeExtensions('unknown'));
+        $this->assertSame(array($typeExtension1, $typeExtension2), $extension->getTypeExtensions('test'));
+    }
+
+    public function testThrowExceptionForInvalidExtendedType()
+    {
+        $container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerInterface')->getMock();
+
+        $container->expects($this->any())
+            ->method('get')
+            ->with('extension')
+            ->willReturn($this->createFormTypeExtensionMock('unmatched'));
+
+        $extension = new DependencyInjectionExtension($container, array(), array('test' => array('extension')), array());
+
+        $extension->getTypeExtensions('test');
+    }
+
+    public function testGetTypeGuesser()
+    {
+        $container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerInterface')->getMock();
+        $container
+            ->expects($this->once())
+            ->method('get')
+            ->with('foo')
+            ->willReturn($this->getMockBuilder('Symfony\Component\Form\FormTypeGuesserInterface')->getMock());
+        $extension = new DependencyInjectionExtension($container, array(), array(), array('foo'));
+
+        $this->assertInstanceOf('Symfony\Component\Form\FormTypeGuesserChain', $extension->getTypeGuesser());
+    }
+
+    public function testGetTypeGuesserReturnsNullWhenNoTypeGuessersHaveBeenConfigured()
+    {
+        $container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerInterface')->getMock();
+        $extension = new DependencyInjectionExtension($container, array(), array(), array());
+
+        $this->assertNull($extension->getTypeGuesser());
+    }
+
+    private function createFormTypeExtensionMock($extendedType)
+    {
+        $extension = $this->getMockBuilder('Symfony\Component\Form\FormTypeExtensionInterface')->getMock();
+        $extension->expects($this->any())->method('getExtendedType')->willReturn($extendedType);
+
+        return $extension;
+    }
+}

src/Symfony/Component/Form/composer.json

@@ -25,6 +25,7 @@
     "require-dev": {
         "doctrine/collections": "~1.0",
         "symfony/validator": "~2.7.25|^2.8.18",
+        "symfony/dependency-injection": "~2.7",
         "symfony/http-foundation": "~2.2",
         "symfony/http-kernel": "~2.4",
         "symfony/security-csrf": "~2.4",