third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-fillText-invalid-maxWidth.js

   1 descriptionQuiet("Series of tests to ensure that fillText() does not display any text when maxWidth is invalid.");
   2
   3 var canvas = document.createElement('canvas');
   4 var ctx = canvas.getContext('2d');
   5 var canvasWidth = 100;
   6 var canvasHeight = 50;
   7 canvas.setWidth = canvasWidth;
   8 canvas.setHeight = canvasHeight;
   9
  10
  11 ctx.fillStyle = '#0f0';
  12 ctx.fillRect(0, 0, canvasWidth, canvasHeight);
  13 ctx.font = '35px Arial, sans-serif';
  14
  15 debug("Test canvas.fillText() with maxWidth zero");
  16 ctx.fillStyle = '#f00';
  17 ctx.fillText("fail fail fail fail fail", 5, 35, 0);
  18
  19 var imageData = ctx.getImageData(0, 0, canvasWidth, canvasHeight);
  20 var w = imageData.width, h = imageData.height, d = imageData.data;
  21 for (var i = 0; i < h; ++i) {
  22     for (var j = 0; j < w; ++j) {
  23         if (d[4 * (w * i + j) + 0] != 0) shouldBe("d[4 * (w * i + j) + 0]", "0");
  24         if (d[4 * (w * i + j) + 1] != 255) shouldBe("d[4 * (w * i + j) + 1]", "255");
  25         if (d[4 * (w * i + j) + 2] != 0) shouldBe("d[4 * (w * i + j) + 2]", "0");
  26         if (d[4 * (w * i + j) + 3] != 255) shouldBe("d[4 * (w * i + j) + 3]", "255");
  27     }
  28 }
  29
  30 ctx.fillStyle = '#0f0';
  31 ctx.fillRect(0, 0, canvasWidth, canvasHeight);
  32 debug("Test canvas.fillText() with maxWidth -1");
  33 ctx.fillStyle = '#f00';
  34 ctx.fillText("fail fail fail fail fail", 5, 35, -1);
  35
  36 var imageData = ctx.getImageData(0, 0, canvasWidth, canvasHeight);
  37 var w = imageData.width, h = imageData.height, d = imageData.data;
  38 for (var i = 0; i < h; ++i) {
  39     for (var j = 0; j < w; ++j) {
  40         if (d[4 * (w * i + j) + 0] != 0) shouldBe("d[4 * (w * i + j) + 0]", "0");
  41         if (d[4 * (w * i + j) + 1] != 255) shouldBe("d[4 * (w * i + j) + 1]", "255");
  42         if (d[4 * (w * i + j) + 2] != 0) shouldBe("d[4 * (w * i + j) + 2]", "0");
  43         if (d[4 * (w * i + j) + 3] != 255) shouldBe("d[4 * (w * i + j) + 3]", "255");
  44     }
  45 }
  46