LayoutTests/css3/blending/script-tests/blend-mode-property-parsing.js

description("Test the parsing of the mix-blend-mode property.");

function jsWrapperClass(node)
{
    if (!node)
        return "[null]";
    var string = Object.prototype.toString.apply(node);
    return string.substr(8, string.length - 9);
}

function shouldBeType(expression, className, prototypeName, constructorName)
{
    if (!prototypeName)
        prototypeName = className + "Prototype";
    if (!constructorName)
        constructorName = className + "Constructor";
    shouldBe("jsWrapperClass(" + expression + ")", "'" + className + "'");
    shouldBe("jsWrapperClass(" + expression + ".__proto__)", "'" + prototypeName + "'");
    shouldBe("jsWrapperClass(" + expression + ".constructor)", "'" + constructorName + "'");
}

// These have to be global for the test helpers to see them.
var stylesheet, cssRule, declaration, blendModeRule, subRule;
var styleElement = document.createElement("style");
document.head.appendChild(styleElement);
stylesheet = styleElement.sheet;

function testBlendModeRule(description, rule, expectedLength, expectedValue, expectedTypes, expectedTexts)
{
    debug("");
    debug(description + " : " + rule);

    stylesheet.insertRule("body { mix-blend-mode: " + rule + "; }", 0);
    cssRule = stylesheet.cssRules.item(0);

    shouldBe("cssRule.type", "1");

    declaration = cssRule.style;
    shouldBe("declaration.length", "1");
    shouldBe("declaration.getPropertyValue('mix-blend-mode')", "'" + expectedValue + "'");

    blendModeRule = declaration.getPropertyCSSValue('mix-blend-mode');
    shouldBeType("blendModeRule", "CSSPrimitiveValue");
}

var blendmodes = ["normal", "multiply", "screen", "overlay", "darken", "lighten", "color-dodge", "color-burn", "hard-light", "soft-light", "difference", "exclusion", "plus-darker"];

for(x in blendmodes)
   testBlendModeRule("Basic reference", blendmodes[x], 1, blendmodes[x]);


successfullyParsed = true;