| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 15 of 220 | 93% | 5 of 34 | 85% | 5 | 29 | 0 | 35 | 0 | 12 |
| unionField() | | 30% | | 50% | 1 | 2 | 0 | 2 | 0 | 1 |
| get(int) | | 88% | | 50% | 1 | 2 | 0 | 1 | 0 | 1 |
| CUnion(CUnion.Builder) | | 100% | | 100% | 0 | 7 | 0 | 17 | 0 | 1 |
| equals(Object) | | 100% | | 90% | 1 | 6 | 0 | 7 | 0 | 1 |
| hashCode() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 | |
| has(int) | | 100% | | 66% | 2 | 4 | 0 | 1 | 0 | 1 |
| toString() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 | |
| unionFieldIsSet() | | 100% | | 100% | 0 | 2 | 0 | 1 | 0 | 1 |
| mutate() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 | |
| compareTo(CUnion) | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 | |
| asString() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 | |
| descriptor() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |