--- /dev/null
+<?php
+
+namespace Drupal\Tests\serialization\Unit\Normalizer;
+
+use Drupal\Core\TypedData\DataDefinition;
+use Drupal\Core\TypedData\TypedDataManagerInterface;
+use Drupal\Tests\UnitTestCase;
+use Drupal\serialization\Normalizer\ListNormalizer;
+use Drupal\Core\TypedData\Plugin\DataType\ItemList;
+use Symfony\Component\Serializer\Serializer;
+
+/**
+ * @coversDefaultClass \Drupal\serialization\Normalizer\ListNormalizer
+ * @group serialization
+ */
+class ListNormalizerTest extends UnitTestCase {
+
+ /**
+ * The ListNormalizer instance.
+ *
+ * @var \Drupal\serialization\Normalizer\ListNormalizer
+ */
+ protected $normalizer;
+
+ /**
+ * The mock list instance.
+ *
+ * @var \Drupal\Core\TypedData\ListInterface|\PHPUnit_Framework_MockObject_MockObject
+ */
+ protected $list;
+
+ /**
+ * The expected list values to use for testing.
+ *
+ * @var array
+ */
+ protected $expectedListValues = ['test', 'test', 'test'];
+
+ /**
+ * The mocked typed data.
+ *
+ * @var \PHPUnit_Framework_MockObject_MockObject|\Drupal\Core\TypedData\TypedDataInterface
+ */
+ protected $typedData;
+
+ protected function setUp() {
+ // Mock the TypedDataManager to return a TypedDataInterface mock.
+ $this->typedData = $this->getMock('Drupal\Core\TypedData\TypedDataInterface');
+ $typed_data_manager = $this->getMock(TypedDataManagerInterface::class);
+ $typed_data_manager->expects($this->any())
+ ->method('getPropertyInstance')
+ ->will($this->returnValue($this->typedData));
+
+ // Set up a mock container as ItemList() will call for the 'typed_data_manager'
+ // service.
+ $container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerBuilder')
+ ->setMethods(['get'])
+ ->getMock();
+ $container->expects($this->any())
+ ->method('get')
+ ->with($this->equalTo('typed_data_manager'))
+ ->will($this->returnValue($typed_data_manager));
+
+ \Drupal::setContainer($container);
+
+ $this->normalizer = new ListNormalizer();
+
+ $this->list = new ItemList(new DataDefinition());
+ $this->list->setValue($this->expectedListValues);
+ }
+
+ /**
+ * Tests the supportsNormalization() method.
+ */
+ public function testSupportsNormalization() {
+ $this->assertTrue($this->normalizer->supportsNormalization($this->list));
+ $this->assertFalse($this->normalizer->supportsNormalization(new \stdClass()));
+ }
+
+ /**
+ * Tests the normalize() method.
+ */
+ public function testNormalize() {
+ $serializer = $this->prophesize(Serializer::class);
+ $serializer->normalize($this->typedData, 'json', ['mu' => 'nu'])
+ ->shouldBeCalledTimes(3)
+ ->willReturn('test');
+
+ $this->normalizer->setSerializer($serializer->reveal());
+
+ $normalized = $this->normalizer->normalize($this->list, 'json', ['mu' => 'nu']);
+
+ $this->assertEquals($this->expectedListValues, $normalized);
+ }
+
+}