Right now, values provided via the inject method are not passed to the questions' validate functions, but set as a value straight away. This prevents testing of falsy user input.

Minimal example:

  const prompts = require('prompts');
  (async () => {
    prompts.inject(['a', 'abc']);
    const response = await prompts({
      type: 'text',
      name: 'example',
      message: 'Should be longer than 1',
      validate: val => val.length > 1,
    });
    assert.strictEqual(response.name, 'abc');
  })();

This will fail, as the validate function is never called and 'a' is returned as an answer. Bummer.

I really like the possibility to inject values, it makes this project stand out from other alternatives which are not as easily testable. But without the possibility to also test custom validators, this is by far not as useful as it could be.