e", "none underline");
test_invalid_value("text-decoration-line", "none spelling-error");
test_invalid_value("text-decoration-line", "underline underline");
test_invalid_value("text-decoration-line", "underline none overline");
test_invalid_value("text-decoration-line", "blink line-through blink");
test_invalid_value("text-decoration-line", "spelling-error overline");
test_invalid_value("text-decoration-line", "spelling-error grammar-error");
test_invalid_value("text-decoration-line", "blink underline line-