| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 19 of 150 | 87% | 2 of 14 | 85% | 3 | 15 | 5 | 40 | 1 | 8 |
| ReducingKeyIterator(Collection) | | 70% | | 100% | 0 | 2 | 3 | 10 | 0 | 1 |
| remove() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| close() | | 83% | | 75% | 1 | 3 | 1 | 6 | 0 | 1 |
| maybeInit() | | 100% | | 75% | 1 | 3 | 0 | 7 | 0 | 1 |
| getTotalBytes() | | 100% | | 100% | 0 | 2 | 0 | 6 | 0 | 1 |
| getBytesRead() | | 100% | | 100% | 0 | 2 | 0 | 6 | 0 | 1 |
| next() | | 100% | n/a | 0 | 1 | 0 | 2 | 0 | 1 | |
| hasNext() | | 100% | n/a | 0 | 1 | 0 | 2 | 0 | 1 |