public function testComplexMessageDescriptor()
{
$descriptor = AddressBook::descriptor();
$this->assertInstanceOf(DescriptorProto::CLASS, $descriptor);
$this->assertEquals('AddressBook', $descriptor->getName());
$this->assertCount(1, $descriptor->getFieldList());
$this->assertInstanceOf(FieldDescriptorProto::CLASS, $descriptor->getFieldList()[0]);
$this->assertEquals(1, $descriptor->getFieldList()[0]->getNumber());
$this->assertEquals('person', $descriptor->getFieldList()[0]->getName());
$this->assertSame(Type::TYPE_MESSAGE(), $descriptor->getFieldList()[0]->getType());
$this->assertSame(Label::LABEL_REPEATED(), $descriptor->getFieldList()[0]->getLabel());
$this->assertEquals('.ProtobufCompilerTest.Protos.Person', $descriptor->getFieldList()[0]->getTypeName());
}