block = $objectManager->getObject(\Magento\Theme\Block\Html\Footer::class); } protected function tearDown() { $this->block = null; } public function testGetIdentities() { $this->assertEquals( [\Magento\Store\Model\Store::CACHE_TAG, \Magento\Cms\Model\Block::CACHE_TAG], $this->block->getIdentities() ); } /** * Check Footer block has cache lifetime. * * @throws \ReflectionException * @return void */ public function testGetCacheLifetime() { $reflection = new \ReflectionClass($this->block); $method = $reflection->getMethod('getCacheLifetime'); $method->setAccessible(true); $this->assertEquals(3600, $method->invoke($this->block)); } }