public function testHasAndFindSubSemanticData()
{
$title = Title::newFromText(__METHOD__);
$instance = new SemanticData(DIWikiPage::newFromTitle($title));
$subobject = $this->newSubobject($title);
$subobjectName = $subobject->getSemanticData()->getSubject()->getSubobjectName();
$this->assertFalse($instance->hasSubSemanticData());
$this->assertEmpty($instance->findSubSemanticData($subobjectName));
// Adds only a subobject reference to the container
$instance->addPropertyObjectValue($subobject->getProperty(), $subobject->getSemanticData()->getSubject());
$this->assertFalse($instance->hasSubSemanticData($subobjectName));
$this->assertEmpty($instance->findSubSemanticData($subobjectName));
$instance->addSubSemanticData($subobject->getSemanticData());
$this->assertTrue($instance->hasSubSemanticData($subobjectName));
$this->assertNotEmpty($instance->findSubSemanticData($subobjectName));
$this->assertInstanceOf('SMWContainerSemanticData', $instance->findSubSemanticData($subobjectName));
}
