circle(123)");
test_invalid_value("shape-outside", "circle(at)");
test_invalid_value("shape-outside", "circle(4% 20%)");
test_invalid_value("shape-outside", "circle(4% 20% at center)");
test_invalid_value("shape-outside", "circle(4px 20px)");
test_invalid_value("shape-outside", "circle(4px, 20px)");
test_invalid_value("shape-outside", "circle(at 4px, 20px)");
test_invalid_value("shape-outside", "circle(-10px at 20px 30px)");
test_invalid_value("shape-outside", "circle(-10% at 20% 30%)");
test_invalid_value(