geometry-box>
test_valid_value("clip-path", "border-box");
test_valid_value("clip-path", "padding-box");
test_valid_value("clip-path", "content-box");
test_valid_value("clip-path", "margin-box");
test_valid_value("clip-path", "fill-box");
test_valid_value("clip-path", "stroke-box");
test_valid_value("clip-path", "view-box");

// basic-shape> <geometry-box>
test_valid_value("clip-path", "circle(7% at 8% 9%) border-box");

// <geometry-box> basic-shape>
test_valid_value("clip-path", "border-box circle(7% at 8