def testCssNoMixinShims(self):
    self.VerifyContentsProducesOutput('\n:host {\n  --good-property: red;\n  --not-okay-mixin_-_not-okay-property: green;\n}', "\n- Don't override custom properties created by Polymer's mixin shim. Set mixins or documented custom properties directly.\n    --not-okay-mixin_-_not-okay-property: green;")
def testCssNoMixinShims(self):
    self.VerifyContentsProducesOutput('\n:host {\n  --good-property: red;\n  --not-okay-mixin_-_not-okay-property: green;\n}', "\n- Don't override custom properties created by Polymer's mixin shim. Set mixins or documented custom properties directly.\n    --not-okay-mixin_-_not-okay-property: green;")