public function testGetIdentities()
{
$productTags = ['catalog_product_1'];
$product = $this->getMock('Magento\\Catalog\\Model\\Product', [], [], '', false);
$product->expects($this->once())->method('getIdentities')->will($this->returnValue($productTags));
$this->registryMock->expects($this->once())->method('registry')->with('current_product')->will($this->returnValue($product));
$this->assertEquals($productTags, $this->block->getIdentities());
}
