def testCssStringWithAt(self):
    self.VerifyContentIsValid('\n#logo {\n  background-image: url(images/google_logo.png@2x);\n}\n\nbody.alternate-logo #logo {\n  -webkit-mask-image: url(images/google_logo.png@2x);\n  background: none;\n}\n\ndiv {\n  margin-inline-start: 5px;\n}\n\n.stuff1 {\n}\n\n.stuff2 {\n}\n      ')
def testCssStringWithAt(self):
    self.VerifyContentIsValid('\n#logo {\n  background-image: url(images/google_logo.png@2x);\n}\n\nbody.alternate-logo #logo {\n  -webkit-mask-image: url(images/google_logo.png@2x);\n  background: none;\n}\n\ndiv {\n  margin-inline-start: 5px;\n}\n\n.stuff1 {\n}\n\n.stuff2 {\n}\n      ')