arquero
arquero copied to clipboard
Silly problem when using istanbul with real arrow functions
When instrumenting code for code coverage there will be additional operations injected into real arrow functions associated with derive. Since derive doesn't support SequenceExpressions this causes a weird error, that has really no solutions other than either rewriting the code using symbolic string expressions or excluding the whole file from code coverage. I am wondering if by default SequenceExpressions could just be evaluated as the last Expression in the list or maybe some hook to override the functionality of SequenceExpressions?
Ref https://docs.cypress.io/guides/tooling/code-coverage#Using-NYC The instrumentation will put additional ++someglobal[LINE] into the code so when toString() looks at the arrow function it will see additional ++ operation inside of the code segment before parsing it and generating a SequenceExpression.