| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 6 of 147 | 95% | 12 of 36 | 66% | 12 | 21 | 2 | 28 | 0 | 3 |
| operands(Expression) | | 96% | | 66% | 10 | 16 | 2 | 23 | 0 | 1 |
| isString(Expression) | | 84% | | 50% | 2 | 3 | 0 | 2 | 0 | 1 |
| unwrap(Expression) | | 100% | | 100% | 0 | 2 | 0 | 3 | 0 | 1 |