| <!DOCTYPE html> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <body> |
| <p>This test checks various characters that should always be zero width to ensure that they are. |
| The WebKit text system ensures this in a way that's independent of the fonts installed on the system.</p> |
| <p id="testArea"><span id="characters">ab</span></p> |
| <script> |
| run(); |
| function run() { |
| var span = document.getElementById("characters"); |
| var abWidth = span.offsetWidth; |
| test(() => { |
| span.firstChild.data = "a"; |
| var aWidth = span.offsetWidth; |
| assert_greater_than(abWidth, aWidth, "Check width measurement"); |
| }, "Check width measurement"); |
| |
| const testCharacters = [ |
| 0x200B, |
| 0x200C, |
| 0x200D, |
| 0x200E, |
| 0x200F, |
| 0xFEFF |
| ]; |
| for (let testCharacter of testCharacters) { |
| test(() => { |
| span.firstChild.data = "a" + String.fromCharCode(testCharacter) + "b"; |
| var abWithCharactersWidth = span.offsetWidth; |
| assert_equals(abWithCharactersWidth, abWidth); |
| }, `U+${testCharacter.toString(16).toUpperCase()} should be zero-width`); |
| } |
| } |
| </script> |
| </body> |
