| <!DOCTYPE HTML> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| |
| <script> |
| test(function() { |
| var reregisterError = {name: 'InvalidModificationError'}; |
| var unregisterError = {name: 'NotFoundError'}; |
| CSS.registerProperty({name: '--property'}); |
| assert_throws(reregisterError, () => CSS.registerProperty({name: '--property'})); |
| assert_throws(unregisterError, () => CSS.unregisterProperty({name: '--property2'})); |
| |
| CSS.registerProperty({name: '--property2', syntax: '<length>', initialValue: '5px'}); |
| assert_throws(reregisterError, () => CSS.registerProperty({name: '--property2'})); |
| assert_throws(reregisterError, () => CSS.registerProperty({name: '--property'})); |
| |
| CSS.unregisterProperty('--property'); |
| assert_throws(unregisterError, () => CSS.unregisterProperty({name: '--property'})); |
| assert_throws(reregisterError, () => CSS.registerProperty({name: '--property2'})); |
| CSS.registerProperty({name: '--property'}); |
| assert_throws(reregisterError, () => CSS.registerProperty({name: '--property'})); |
| |
| CSS.unregisterProperty('--property2'); |
| assert_throws(unregisterError, () => CSS.unregisterProperty({name: '--property2'})); |
| }, "Registration state is correctly managed and correct errors are thrown"); |
| </script> |
