API run code coverage.

[Kush Mishra]

Hi 

I am exploring tools capable of capturing the code coverage against the run of an API.

There would be a Java application and I would hit the endpoints via postman. I am interested in knowing the code coverage of this hit. Is this possible using Jacoco ? Till now what I have explored about it is all related to unit test cases.

I am planning to build a report UI on top of this to monitor code coverage against APIs.

Best regards

Kush

[Marc Hoffmann]

Hi Kush,

sure JaCoCo can collect execution data for any Java application.

To collect coverage data of a specific “hit” you have to execute the processing in isolation. As JaCoCo collects execution data of all executed code, you can not run this test while the server serves other requests too.

The steps are as always:

1) Run the server with the JaCoCo agent attached

2) Execute some test (e.g. exercise the endpoints)

3) Shut down the server properly to get the execution data file

4) Create coverage report

Alternatively JaCoCo agent supports a remote control protocol: This allows to collect and reset execution data without shutdown. So you can select separate coverage data for each request.

I am planning to build a report UI on top of this to monitor code coverage against APIs.

I think this is perfectly possible with the JaCoCo APIs.

Regards,

-marc

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