Getting cross-package test coverage data?

[Tom Payne]

What's the current state of getting combined cross-package test coverage data? Specifically:

• I have a lib directory containing my library code, which has some tests, but not many.
• I have a cmd directory containing my main code and many tests that exercises the code in lib .
• I want to know what code in lib is covered by my tests in cmd (and, more specifically, which code in lib is not covered by the tests so I can add more tests).

My current understanding is I need to use a third-party tool to merge coverage, like https://github.com/ory/go-acc.

Is this correct?

Many thanks,

Tom

[pankaj pipada]

Not sure if a tool is required. 

It can be done with a couple of commands. 

An elaborate example (of coverage across different types of tests, etc) is provided at: https://www.elastic.co/blog/code-coverage-for-your-golang-system-tests

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Pankaj Pipada

[twp...@gmail.com]

Very, very, late response to this, but I was missing the `-coverpkg=./...` argument to `go test`. /facepalm