Ignoring code in catch blocks

[Ran Cohen]

I have general catch blocks, that attached to exceptions almost impossibly thrown.

Because its almost impossible to cause an exception, and also because they just re-throw the exception, I don't test them, but Jacoco marks the catch block as not tested, which is ugly...

How can I tell Jacoco to ignore this blocks (or any other code for that matter)?

[Marc Hoffmann]

Hi Ran,

JaCoCo does not have an option to exclude parts of a method. We have an open feature request for this:

https://github.com/jacoco/jacoco/issues/14

For a couple of reasons it is very unlikely that such functionality will be added to JaCoCo soon.

Regards,
-marc

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[Ran Cohen]

In the mean time - what can I do? How can I test catch-blocks that would rarely occur (and are almost impossible to replicate)?  

[Marc Hoffmann]

There are different strategies:

• Use mocking to test those exceptions (assuming you have a proper delegate which can be mocked)
• Change your exception hierarchies or method signatures to avoid such catch blocks

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