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Per test coverage from integration tests

Verand Mar 12, 2014

I have instrumented my web app (a Maven project) source code (NOT tests) using clover and deployed it to tomcat (Initstring=absolute path & flushpolicy = threaded, distributed cov =ON). This acts as a clover client.

Now, i have a different project created for my integration tests (an Eclipse project) and instrumented where coverage.db is pointed to a different location (flushpolicy = threaded, distributed coverage=ON). This acts as a clover server. When i run my "Junit" tests, i was able to see the code coverage but not per-test coverage.

I understand that the clover server & client are using different Initstring values. What should be done to get per-test coverage? Merging dbs?

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Marek Parfianowicz Atlassian Team Mar 16, 2014

Hi Verand,

You should build both application and tests using the same database. You shall not merge databases - a merged database can be used for reporting only.

In case you'd need to change initstring value at runtime, you can use the -Dclover.inistring=/path/to/clover.db property.


Verand Mar 16, 2014

Hi Marek,

If we try to build both application and test (considering them as different independent projects) using the same database, the application clover db will be overwritten by the test clover.db when we build the projects. Do you think it would cause a problem?

Marek Parfianowicz Atlassian Team Mar 16, 2014
Unless you delete the clover.db file Clover should update the file instead of overwriting it
Verand Mar 17, 2014

Hi Marek,

I am seeing different. When i built project A from eclipse it created clover.db of size ~1MB and when i built project B from eclipse (initstring is same), it didn't update the file instead it overwrote existing clover.db (new size is ~500KB). I am using clover version #3.2.2. Is there something that i am missing here?



Marek Parfianowicz Atlassian Team Mar 17, 2014

Oh. You're building your Eclipse project using the Eclipse IDE, right? Can you switch to a command-line build, such as Maven? I'm asking because Clover-for-Eclipse plugin overwrites an existing database.

Verand Mar 18, 2014

Yes, I was building my projects from Eclipse IDE. Now, i switched my "dev" project to maven while my "test" project remains to be the Eclipse project.

Followed steps as below to get per-test coverage:

1. First, i instrumented my "test" project using Eclipse IDE => this has generated clover.db file

2. Next, i instrumented my "dev" project using maven => this has updated my existing clover.db bcz my initstring is same and built a war out of it which is inclusive of all my instrumented classes (does not include "test" files).

3. Deployed war to tomcat container (also, distributed coverage ON)

4. Now i executed a JUnit test (distributed coverage ON and communicating to my tomcat client) => generated new coverage files as expected but i could not get per-test coverage.

Something else that i should be doing to achive per-test coverage?



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