src/third_party/WebKit/LayoutTests/css3/compositing/script-tests/blend-mode-property-parsing.js

   1 description("Test the parsing of the mix-blend-mode property.");
   2
   3 function jsWrapperClass(node)
   4 {
   5     if (!node)
   6         return "[null]";
   7     var string = Object.prototype.toString.apply(node);
   8     return string.substr(8, string.length - 9);
   9 }
  10
  11 function shouldBeType(expression, className, prototypeName, constructorName)
  12 {
  13     if (!prototypeName)
  14         prototypeName = "Object";
  15     if (!constructorName)
  16         constructorName = "Function";
  17     shouldBe("jsWrapperClass(" + expression + ")", "'" + className + "'");
  18     shouldBe("jsWrapperClass(" + expression + ".__proto__)", "'" + prototypeName + "'");
  19     shouldBe("jsWrapperClass(" + expression + ".constructor)", "'" + constructorName + "'");
  20 }
  21
  22 // These have to be global for the test helpers to see them.
  23 var stylesheet, cssRule, declaration, blendModeRule, subRule;
  24 var styleElement = document.createElement("style");
  25 document.head.appendChild(styleElement);
  26 stylesheet = styleElement.sheet;
  27
  28 function testBlendModeRule(description, rule, expectedLength, expectedValue, expectedTypes, expectedTexts)
  29 {
  30     debug("");
  31     debug(description + " : " + rule);
  32
  33     stylesheet.insertRule("body { mix-blend-mode: " + rule + "; }", 0);
  34     cssRule = stylesheet.cssRules.item(0);
  35
  36     shouldBe("cssRule.type", "1");
  37
  38     declaration = cssRule.style;
  39     shouldBe("declaration.length", "1");
  40     shouldBe("declaration.getPropertyValue('mix-blend-mode')", "'" + expectedValue + "'");
  41
  42     blendModeRule = declaration.getPropertyCSSValue('mix-blend-mode');
  43     shouldBeType("blendModeRule", "CSSPrimitiveValue");
  44 }
  45
  46 var blendmodes = ["normal", "multiply", "screen", "overlay", "darken", "lighten", "color-dodge", "color-burn", "hard-light", "soft-light", "difference", "exclusion", "hue", "saturation", "color", "luminosity"];
  47
  48 for(x in blendmodes)
  49    testBlendModeRule("Basic reference", blendmodes[x], 1, blendmodes[x]);
  50
  51
  52 successfullyParsed = true;