| PASS | preconditions | |
| PASS | insertRule with #bar selector | |
| PASS | insertRule with no argument throws | |
| PASS | insertRule with index greater than length throws | |
| PASS | deleteRule(1) | |
| PASS | deleteRule with no argument throws | |
| PASS | deleteRule on empty style sheet throws | |
| PASS | removeRule with no argument removes first rule | |
| PASS | removeRule on empty style sheet throws | |
| PASS | addRule with @media rule | |
| PASS | removeRule(1) | |
| PASS | addRule with #foo selectors | |
| PASS | addRule with no argument adds "undefined" selector | |
| PASS | addRule with index greater than length throws | |
| PASS | cssRules and rules are the same object | |
| PASS | cssRules returns the same object twice | |
| PASS | rules returns the same object twice | |