| FAIL sheet_property assert_own_property: expected property "sheet" missing | |
| PASS sheet_property_updates | |
| FAIL CSSStyleSheet_properties undefined is not an object (evaluating 'object.hasOwnProperty') | |
| FAIL CSSStyleSheet_property_values undefined is not an object (evaluating 'styleSheet.ownerRule') | |
| FAIL StyleSheet_properties undefined is not an object (evaluating 'object.hasOwnProperty') | |
| FAIL StyleSheet_property_values undefined is not an object (evaluating 'styleSheet.type') | |