Function testWhatAction

testWhatAction(what: string): Promise<void>
Tests validator, checker, or solution programs. For validator/checker: Runs self-tests from their test configuration. For solutions: Tests against main-correct solution using checker.
Parameters
- what: string
  'validator', 'checker', or solution name to test
Returns Promise<void>
Resolves when testing completes
Throws
If Config.json is invalid

Throws
If validator/checker tests fail

Throws
If solution doesn't exist

Throws
If main-correct solution doesn't exist

Throws
If solution behavior doesn't match expected type
Example
```
// From CLI: polyman test validator
await testWhatAction('validator');
// Runs validator self-tests from validator_tests.json
```
Example
```
// From CLI: polyman test checker
await testWhatAction('checker');
// Runs checker self-tests from checker_tests.json
```
Example
```
// From CLI: polyman test wa-solution
await testWhatAction('wa-solution');
// Runs wa-solution and main solution, compares with checker
// Validates that wa-solution gets WA on at least one test
```
- Defined in actions.ts:725