Audit Silently Succeeds When No Tests Run

[Kurt-von-Laven]

Describe the bug

The audit should fail when the license auditor is configured with a malformed validator function.

To reproduce

Steps to reproduce the behavior:

1. Create .licenses.config.ts with the following contents:

   const VALID_LICENSES =
     "(MIT|Apache-2.0|0BSD|BSD-[2-3]-Clause|ISC)";
   const VALIDATOR = new RegExp(
     `^(${VALID_LICENSES}|\\(${VALID_LICENSES}( OR ${VALID_LICENSES})*\\))$`
   );
   
   /* Test what happens when the auditor is misconfigured. The correct configuration would be:
    * module.exports = { isValidLicense: (license) => VALIDATOR.test(license) };
    */
   module.exports = { isValidLicense: VALIDATOR.test };

2. Run yarn set version 3.0.0 to install Yarn 3.0.0.
3. Run yarn add --dev [email protected].
4. Run yarn licenses audit --output-file=reports/junit/licenses.xml --config=.licenses.config.ts --loose.
5. Run echo $? to see that the audit succeeded, exiting with code 0.
6. reports/junit/licenses.xml contains:

   <?xml version="1.0" encoding="UTF-8"?>
   <testsuites>
     <testsuite name="Dependency Licenses Audit" tests="0" failures="0" errors="0" skipped="0"/>
   </testsuites>

Expected behavior

I expected the audit to fail because the license validator function itself was invalid.

Environment (please complete the following information):

• OS: Ubuntu 22.04
• Plugin Version: f2d2e09
• Node Version: 16.15.0