Quick way to find and run tests

[Lutz]

Hey devs,

When I make a code change, I regularly run all unit tests that I
touched to make sure things still work properly. However, I don't know
a quick way to do that. It feels very awkward to figure out all build
targets that I have to build and run. Right now, I'm using this
procedure:

- Code search for some_unittest.cc to find corresponding BUILD.gn.
- In BUILD.gn, figure out which target contains the unit test.
- Compile that target.
- Run that target.
- Iterate until test works.

It would be nice if there was a way to automate this process, e.g. a
shell script

run_my_test SomeTest.Name SomeOtherTest.Name ...

Is there something like this? Ideally the script could also figure out
what unit tests my local changes touch and run all related tests. I
know there's git cl try, but the iteration times are very high.

Thanks!

[Dirk Pranke]

There isn't something already written, but given the introspection that GN can provide,

it wouldn't be too hard to write something; it's quite similar to what `analyze` does on

the builders in `git cl try`.

Of course, you would only get test coverage in your local machine and configuration,

and would still want `git cl try` for completeness, but I agree that the iteration time will

be higher.

-- Dirk

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