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)); $this->block->setProduct($product); $this->assertEquals($productTags, $this->block->getIdentities()); }