| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 16 of 130 | 87% | 2 of 22 | 90% | 3 | 21 | 2 | 36 | 1 | 10 |
| join(String, String) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| join(String[]) | | 50% | | 50% | 1 | 2 | 1 | 3 | 0 | 1 |
| join(Iterable, char, Function, StringBuilder) | | 100% | | 100% | 0 | 4 | 0 | 10 | 0 | 1 |
| splitCommaSeparated(String) | | 100% | | 83% | 1 | 4 | 0 | 6 | 0 | 1 |
| join(Collection, char) | | 100% | | 100% | 0 | 3 | 0 | 5 | 0 | 1 |
| join(Object[], char, Function, StringBuilder) | | 100% | | 100% | 0 | 2 | 0 | 4 | 0 | 1 |
| join(String[], char, StringBuilder) | | 100% | | 100% | 0 | 2 | 0 | 4 | 0 | 1 |
| join(Iterable, char, StringBuilder) | | 100% | n/a | 0 | 1 | 0 | 2 | 0 | 1 | |
| join(Collection) | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 | |
| lambda$join$0(String) | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |