third_party/WebKit/LayoutTests/fast/js/script-tests/dfg-byte-array-put.js

   1 description(
   2 "This tests that the DFG JIT's optimizations for byte arrays work as expected."
   3 );
   4
   5 function doPut(array, index, value) {
   6     array[index] = value;
   7 }
   8
   9 function doGet(array, index) {
  10     return array[index];
  11 }
  12
  13 canvas = document.createElement("canvas");
  14 context = canvas.getContext("2d");
  15 imageData = context.createImageData(10,10);
  16 data = imageData.data;
  17
  18 shouldBe("data.length", "400");
  19
  20 for (var i = 0; i < 1000; ++i) {
  21     doPut(data, i % 100, i - 100);
  22     var expectedValue;
  23     if (i < 100)
  24         expectedValue = 0;
  25     else if (i > 355)
  26         expectedValue = 255;
  27     else
  28         expectedValue = i - 100;
  29     shouldBe("doGet(data, " + (i % 100) + ")", "" + expectedValue);
  30 }
  31
  32 var successfullyParsed = true;