[all-commits] [llvm/llvm-project] adb5c2: [test] Exit with an error if no tests are run.

[Jordan Rupprecht via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: adb5c23f8c0d60eeec41dcbe21d1b26184e1c97d
      https://github.com/llvm/llvm-project/commit/adb5c23f8c0d60eeec41dcbe21d1b26184e1c97d
  Author: Jordan Rupprecht <rupprecht at google.com>
  Date:   2020-08-03 (Mon, 03 Aug 2020)

  Changed paths:
    M lldb/packages/Python/lldbsuite/test/dotest.py

  Log Message:
  -----------
  [test] Exit with an error if no tests are run.

If the test suite is misconfigured when it's run (a bad regexp, wrong test directory, etc.), the test suite may not discover any tests. When this happens, the test runner exits happily because no tests failed:

```
Ran 0 tests in 0.000s
RESULT: PASSED (0 passes, 0 failures, 0 errors, 0 skipped, 0 expected failures, 0 unexpected successes)
```

Change this to return an error so the misconfiguration can be more easily detected. Verified that `lldb-dotest -p TestDoesNotExist.py` successfully fails.

Reviewed By: JDevlieghere

Differential Revision: https://reviews.llvm.org/D85169