public function testInterpretReferenceBlockDirective()
{
$pageXml = new \Magento\Framework\View\Layout\Element(__DIR__ . '/_files/_layout_update_reference.xml', 0, true);
$parentElement = new \Magento\Framework\View\Layout\Element('<page></page>');
foreach ($pageXml->xpath('body/*') as $element) {
$this->assertTrue(in_array($element->getName(), $this->block->getSupportedNodes()));
$this->block->interpret($this->readerContext, $element, $parentElement);
}
$structure = $this->readerContext->getScheduledStructure();
$this->assertArrayHasKey($this->blockName, $structure->getStructure());
$this->assertEquals('block', $structure->getStructure()[$this->blockName][self::IDX_TYPE]);
$resultElementData = $structure->getStructureElementData($this->blockName);
$this->assertEquals(['test_arg' => 'test-argument-value'], $resultElementData['arguments']);
}