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

   1 description("Test for invalid input of setLineDash, getLineDash and lineDashOffset");
   2
   3 var canvas = document.createElement('canvas');
   4 document.body.appendChild(canvas);
   5 canvas.setAttribute('width', '700');
   6 canvas.setAttribute('height', '700');
   7 var ctx = canvas.getContext('2d');
   8 var initialLineDash = [1.5, 2.5];
   9 var initialLineDashOffset = 1.5;
  10
  11 function resetLineDash() {
  12     ctx.setLineDash(initialLineDash);
  13     ctx.lineDashOffset = initialLineDashOffset;
  14 }
  15
  16 function trySettingLineDash(value) {
  17     resetLineDash();
  18     ctx.setLineDash(value);
  19     return ctx.getLineDash();
  20 }
  21
  22 function trySettingLineDashWithNoArgs() {
  23     resetLineDash();
  24     ctx.setLineDash();
  25     return ctx.getLineDash();
  26 }
  27
  28 function trySettingLineDashOffset(value) {
  29     resetLineDash();
  30     ctx.lineDashOffset = value;
  31     return ctx.lineDashOffset;
  32 }
  33
  34 shouldBe("trySettingLineDash([1, -1])", "initialLineDash");
  35 shouldBe("trySettingLineDash([1, Infinity])", "initialLineDash");
  36 shouldBe("trySettingLineDash([1, -Infinity])", "initialLineDash");
  37 shouldBe("trySettingLineDash([1, NaN])", "initialLineDash");
  38 shouldBe("trySettingLineDash([1, 'string'])", "initialLineDash");
  39 shouldThrow("trySettingLineDashWithNoArgs()", '"TypeError: Failed to execute \'setLineDash\' on \'CanvasRenderingContext2D\': 1 argument required, but only 0 present."');
  40
  41 shouldBe("trySettingLineDashOffset(Infinity)", "initialLineDashOffset");
  42 shouldBe("trySettingLineDashOffset(-Infinity)", "initialLineDashOffset");
  43 shouldBe("trySettingLineDashOffset(NaN)", "initialLineDashOffset");
  44 shouldBe("trySettingLineDashOffset('string')", "initialLineDashOffset");