ansition-timing-function", "steps(0, jump-start)");
test_invalid_value("transition-timing-function", "steps(0, jump-end)");
test_invalid_value("transition-timing-function", "steps(0, jump-both)");
test_invalid_value("transition-timing-function", "steps(1, jump-none)");
test_invalid_value("transition-timing-function", "steps(2,()start)");
test_invalid_value("transition-timing-function", "steps(2,() start)");
test_invalid_value("transition-timing-function", "steps(2, ()start)");
test_invalid_value("transition