Audit Silently Succeeds When No Tests Run

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:

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 };

Run yarn set version 3.0.0 to install Yarn 3.0.0.
Run yarn add --dev ts-node@10.8.1.
Run yarn licenses audit --output-file=reports/junit/licenses.xml --config=.licenses.config.ts --loose.
Run echo $? to see that the audit succeeded, exiting with code 0.

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: f2d2e094a16b722c0e8504c787617e83c6ce515f
Node Version: 16.15.0

tophat / yarn-plugin-licenses

Audit Silently Succeeds When No Tests Run #22