description('Test the parsing of the image-set functions.');
// These have to be global for the test helpers to see them.
var cssRule;
function testInvalidImageSet(description, rule, isPrefixed) {
rule = `${isPrefixed ? '-webkit-' : ''}image-set(${rule}`;
debug('');
debug(`${description} : ${rule}`);
var div = document.createElement('div');
div.style.backgroundImage = rule;
document.body.appendChild(div);
cssRule = div.style.backgroundImage;
shouldBeEmptyString('cssRule');
document.body.removeChild(div);
}
function testInvalidImageSets(description, rule) {
// Test standard image-set
testInvalidImageSet(description, rule, false);
// Test '-webkit-' prefixed image set
testInvalidImageSet(description, rule, true);
}
testInvalidImageSets('Too many url parameters', 'url(#a #b)');
testInvalidImageSets('No x', 'url(\'#a\') 1');
testInvalidImageSets('No comma', 'url(\'#a\') 1x url(\'#b\') 2x');
testInvalidImageSets('Too many scale factor parameters', 'url(\'#a\') 1x 2x');
successfullyParsed = true;