Q: How are the Clover coverage percentages calculated?
The "total" coverage percentage of a class (or file, package, project) is provided as a quick guide to how well the class is covered — and to allow ranking of classes.
The Total Percentage Coverage (TPC) is calculated using the formula:
TPC = (CT + CF + SC + MC)/(2*C + S + M){excerpt}
where
CT - conditionals that evaluated to "true" at least once CF - conditionals that evaluated to "false" at least once SC - statements covered MC - methods entered C - total number of conditionals S - total number of statements M - total number of methods