third_party/WebKit/LayoutTests/fast/canvas/drawImage-with-broken-image.html

   1 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
   2 <html>
   3 <head>
   4 <script src="../../resources/js-test.js"></script>
   5 </head>
   6 <script>
   7     window.jsTestIsAsync = true;
   8     description("This test checks behavior of Canvas::drawImage with a broken source image.");
   9
  10     // Create an image with invalid data.
  11     var invalidImage = new Image();
  12     invalidImage.src = 'resources/shadow-offset.js';
  13     invalidImage.onerror = draw;
  14
  15     var ctx = document.createElement("canvas").getContext('2d');
  16     function draw() {
  17         // null and undefined images should throw TypeError
  18         shouldThrow("ctx.drawImage(null, 0, 0)");
  19         shouldThrow("ctx.drawImage(null, 0, 0, 20, 20)");
  20         shouldThrow("ctx.drawImage(null, 0, 0, 20, 20, 0, 0, 20, 20)");
  21         shouldThrow("ctx.drawImage(undefined, 0, 0)");
  22         shouldThrow("ctx.drawImage(undefined, 0, 0, 20, 20)");
  23         shouldThrow("ctx.drawImage(undefined, 0, 0, 20, 20, 0, 0, 20, 20)");
  24
  25         // broken images should not throw
  26         shouldThrow("ctx.drawImage(invalidImage, 0, 0)");
  27         shouldThrow("ctx.drawImage(invalidImage, 0, 0, 20, 20)");
  28         shouldThrow("ctx.drawImage(invalidImage, 0, 0, 20, 20, 0, 0, 20, 20)");
  29         shouldThrow("ctx.drawImage(invalidImage, 0, 0, 0, 20)");
  30         shouldThrow("ctx.drawImage(invalidImage, 0, 0, 0, 20, 0, 0, 20, 20)");
  31
  32         finishJSTest();
  33     }
  34 </script>
  35 </body>
  36 </html>