Better Test Coverage Report

[TecNoz by Daniel Cukier]

I am trying to run a test coverage report in my project, but there are some difficulties. I run

$ mix test --cover

1) Is there a way to ignore some files? I'd like to ignore some auto-generated files from the coverage report, because the files that matter are those that I created code.

2) The generated report have some mysterious bugs. It shows that module definition lines are uncovered, but at the same time some lines inside the module are covered. Also it shows method definition lines uncovered, but lines inside those methods are covered.  Here is an example. How 

Thanks

D

[José Valim]

Hi Cukier!

1. There is no way to ignore files but it could definitely be added. Note the coverage in the files are independent though, so ignoring the files would only affect the total coverage report shown by mix.

2. In this example, what is not being covered is the default argument. You never call that function without an argument, so the default argument is never covered, showing the line as red.

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[TecNoz by Daniel Cukier]

Thanks for the answer Valim.

1) Do you know where is the code related to the coverage report? Maybe I could try to contribute with this change.

2) perfect, now I understand. What about this one? Why the module definition is not covered?

[José Valim]

1. it is under the lib/mix application on Elixir's repo

2. It is most likely that "use ..., :view" is defining functions and those functions are not being executed by your tests

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[TecNoz by Daniel Cukier]

Mission accomplished! Thanks for all support

https://github.com/elixir-lang/elixir/pull/10317