| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 3 of 7 | 57% | 0 of 0 | n/a | 2 | 4 | 2 | 4 | 2 | 4 |
| trivialReduceIsTrivial() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| onKeyChange() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| MergeIterator.Reducer() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 | |
| close() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |