third_party/WebKit/LayoutTests/fast/text/zero-width-characters.html

   1 <head>
   2 <script>
   3 function test()
   4 {
   5     if (window.testRunner)
   6         testRunner.dumpAsText();
   7     var testString = "";
   8     for (var i = 0; i < 32; ++i) // >
   9         if (i != 9 && i != 10 && i != 13) // ;
  10             testString += String.fromCharCode(i);
  11     testString += String.fromCharCode(0x200B);
  12     testString += String.fromCharCode(0x200C);
  13     testString += String.fromCharCode(0x200D);
  14     testString += String.fromCharCode(0x200E);
  15     testString += String.fromCharCode(0x200F);
  16     testString += String.fromCharCode(0xFEFF);
  17     testString += String.fromCharCode(0xFFFC);
  18     var span = document.getElementById("characters");
  19     var abWidth = span.offsetWidth;
  20     span.firstChild.data = "a";
  21     var aWidth = span.offsetWidth;
  22     span.firstChild.data = "a" + testString + "b";
  23     var abWithCharactersWidth = span.offsetWidth;
  24
  25     var testArea = document.getElementById("testArea");
  26     testArea.parentNode.removeChild(testArea);
  27
  28     if (abWithCharactersWidth > abWidth)
  29         result = "FAIL: One or more of the characters had a non-zero width.";
  30     else if (abWidth > aWidth)
  31         result = "PASS: All the characters had zero width.";
  32     else
  33         result = "FAIL: Width measurement seems to have failed.";
  34
  35     document.getElementById("result").firstChild.data = result;
  36 }
  37 </script>
  38 </head>
  39 <body onload="test()">
  40 <p>This test checks various characters that should always be zero width to ensure that they are.
  41 The WebKit text system ensures this in a way that's independent of the fonts installed on the system.</p>
  42 <p id="result">FAIL: Script did not run to completion.</p>
  43 <p id="testArea"><span id="characters">ab</span></p>
  44 </body>