Combining Code Coverage (Karma & Cypress)

[jasonparallel]

We are noticing some odd things when trying to combine the coverage.
Looking at the JSON report for the statementMap
Both commonly have a null for the end column but in some instances karma will report a null and cypress (with istanbul instrumentation) will report a specific end column number. When these are combined via nyc they are treated as 2 different statements for the coverage stats
{ "start": { "line": 16, "column": 4 }, "end": { "line": 16, "column": null } }
vs
{ "start": { "line": 16, "column": 4 }, "end": { "line": 16, "column": 46 } }

What does a null column end mean? Could the merge handle this more gracefully?

In this case 16 was wrapped in a if statement that the cypress coverage picked up on for the statementMap and also the branchMap but the karma coverage omited from both.
{ "start": { "line": 15, "column": 2 }, "end": { "line": 17, "column": null } }

We also saw the same thing happen outside the if statement
{ "start": { "line": 18, "column": 2 }, "end": { "line": 18, "column": 14 } }
vs
{ "start": { "line": 18, "column": 2 }, "end": { "line": 18, "column": null } }

And also the same null ending column issue in the fnMap
{ "name": "getError", "decl": { "start": { "line": 14, "column": 16 }, "end": { "line": 14, "column": 24 } }, "loc": { "start": { "line": 14, "column": 45 }, "end": { "line": 19, "column": null } } }
vs
{ "name": "getError", "decl": { "start": { "line": 14, "column": 16 }, "end": { "line": 14, "column": 24 } }, "loc": { "start": { "line": 14, "column": 45 }, "end": { "line": 19, "column": 1 } }

[tommyc38]

Yeah, I am running into this same issue.