| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 10 of 380 | 97% | 5 of 45 | 88% | 8 | 31 | 4 | 76 | 3 | 7 |
| execute(Object[]) | | 96% | | 80% | 5 | 15 | 1 | 38 | 0 | 1 |
| execute(Object) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| currentState() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| restoreState(Map) | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | ||
| init(ExpressionExecutor[], ConfigReader, SiddhiAppContext) | | 100% | | 100% | 0 | 11 | 0 | 30 | 0 | 1 |
| SubstrFunctionExtension() | | 100% | n/a | 0 | 1 | 0 | 4 | 0 | 1 | |
| getReturnType() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |