Conditionally run tests if there is a testthat infrastructure

[krlmlr]

I haven't found an "official" way to detect from outside if testing infrastructure is present: uses_testthat() is not exported. On the other hand, test() fails in non-interactive mode if no testing infrastructure is present. So there seems to be no way to run tests if they exist, and do nothing if they don't. Am I missing anything?

I see two solutions:

1. Export uses_testthat()
2. Don't fail in test() in non-interactive mode if no infrastructure is present.

Which is better?

[hadley]

I'd say export

[lock]

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