| PASS | value with leading '+' should parse as 5 | |
| PASS | max with leading '+' should parse as 10 | |
| PASS | min with leading '+' should parse as 1 | |
| PASS | low with leading '+' should parse as 2 | |
| PASS | high with leading '+' should parse as 8 | |
| PASS | optimum with leading '+' should parse as 6 | |
| PASS | value '+3.14' should parse as 3.14 | |
| PASS | setAttribute with leading '+' should parse correctly | |
| PASS | bare '+' for max should use default value 1 | |
| PASS | bare '-' for max should use default value 1 | |
| PASS | bare '.' for max should use default value 1 | |
| PASS | '+-5' for max should use default value 1 | |