| PASS | Calling StylePropertyMap.has with an unsupported property throws a TypeError | |
| PASS | Calling StylePropertyMap.has with a property not in the property model returns false | |
| PASS | Calling StylePropertyMap.has with a custom property not in the property model returns false | |
| PASS | Calling StylePropertyMap.has with a valid property in mixed case returns false | |
| PASS | Calling StylePropertyMap.has with a valid property returns true | |
| PASS | Calling StylePropertyMap.has with a valid property in mixed case returns true | |
| PASS | Calling StylePropertyMap.has with a valid custom property returns true | |
| PASS | Calling StylePropertyMap.has with a valid list-valued property returns true | |