| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 408 of 875 | 53% | 53 of 104 | 49% | 41 | 65 | 90 | 192 | 7 | 13 |
| write(String, int, int) | | 0% | | 0% | 16 | 16 | 55 | 55 | 1 | 1 |
| write(int) | | 57% | | 61% | 6 | 10 | 11 | 28 | 0 | 1 |
| flush(boolean) | | 0% | | 0% | 4 | 4 | 7 | 7 | 1 | 1 |
| throwIllegal(int) | | 43% | | 50% | 3 | 4 | 3 | 7 | 0 | 1 |
| write(char[], int, int) | | 96% | | 93% | 2 | 16 | 3 | 55 | 0 | 1 |
| write(char[]) | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| write(String) | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| append(char) | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| close() | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| flush() | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| close(boolean) | | 94% | | 60% | 4 | 6 | 1 | 17 | 0 | 1 |
| convertSurrogate(int) | | 100% | | 75% | 1 | 3 | 0 | 5 | 0 | 1 |
| UTF8Writer(IOContext, OutputStream) | | 100% | n/a | 0 | 1 | 0 | 8 | 0 | 1 |