Function validateTestsAction

validateTestsAction(target: string, modifier?: string): Promise<void>
Validates test input files using the validator program. Supports validation by testset, group, or single test.
Parameters
- target: string
  Target specification (testset name or 'all')
- Optionalmodifier: string
  Optional modifier (group name or test index)
Returns Promise<void>
Throws
If Config.json is invalid or missing validator

Throws
If validator compilation fails

Throws
If validator rejects any test
Example
```
// From CLI: polyman validate all
await validateTestsAction('all');
// Validates all testsets
```
Example
```
// From CLI: polyman validate tests
await validateTestsAction('testsets');
// Validates testset named 'testsets'
```
Example
```
// From CLI: polyman validate tests samples
await validateTestsAction('testsets', 'samples');
// Validates group 'samples' in testset 'testsets'
```
Example
```
// From CLI: polyman validate tests 5
await validateTestsAction('testsets', '5');
// Validates test 5 in testset 'testsets'
```
- Defined in actions.ts:448