/** * Tests \Magento\Framework\DataObject->toString() */ public function testToString() { $this->_object->setData('key1', 'value1'); $this->_object->setData('key2', 'value2'); $this->assertEquals('value1, value2', $this->_object->toString()); $this->assertEquals('test value1 with value2', $this->_object->toString('test {{key1}} with {{key2}}')); }