How to run a specific parameter set in parameterized tests using --filter option

[chokuto]

I have been using Criterion for running parameterized tests and encountered an issue when trying to run a specific parameter set using the --filter option.

I would like to run only the test with a specific parameter. I tried using the --filter option like this:

./test --filter 'suite_name/test_name/1'

However, it seems this approach does not work as expected. I need to be able to run and debug specific parameter sets in parameterized tests.

Could you please provide guidance on how to achieve this? Is there a specific way to filter and run only the tests with certain parameters in parameterized tests using Criterion? If not, is there a recommended workaround or an alternative approach to accomplish this?

Thank you for your help!

[jcsahnwaldt]

I guess the filter .../1 is supposed to only run the test with parameter value 1. I think it would be very difficult for Criterion to implement something like this.

The problem is that C is a strongly typed language, and the parameter value can have any type (int, long, a string, a struct, ...). Criterion would have to somehow parse the value in the command line argument, convert it to the parameter's type, and compare it to the parameter values. Not easy in C...

Maybe you can modify your code in ParameterizedTestParameters and filter the list of parameter values it returns depending on the value of a special environment variable. Then you could invoke your tests like this:

FOO_BAR_PARAM_FILTER=1 ./test --filter 'foo_suite/bar_test'

Of course, this means that you'll have to implement the parsing, converting and comparing yourself. But since it's for a specific type, it's much easier than the generic case described above. Maybe half a dozen lines will do...

If the filter .../1 is supposed to select the parameter at index 1, adding that feature would be much less work, but also less useful.