rely/test/features/local/chat_preference_extractor_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:relationship_saver/features/local/chat_preference_extractor.dart';
import 'package:relationship_saver/features/local/local_models.dart';

void main() {
  const ChatPreferenceExtractor extractor = ChatPreferenceExtractor();

  test('extracts prefer-over like/dislike signals', () {
    final List<ExtractedPreferenceSignalCandidate> result = extractor.extract(
      'I prefer tea over coffee, especially at night.',
    );

    expect(
      result.any(
        (ExtractedPreferenceSignalCandidate item) =>
            item.key == 'drink:tea' &&
            item.polarity == PreferenceSignalPolarity.like,
      ),
      isTrue,
    );
    expect(
      result.any(
        (ExtractedPreferenceSignalCandidate item) =>
            item.key == 'drink:coffee' &&
            item.polarity == PreferenceSignalPolarity.dislike,
      ),
      isTrue,
    );
  });

  test('extracts positive and negative statements with categories', () {
    final List<ExtractedPreferenceSignalCandidate> result = extractor.extract(
      "I love bookstores and I don't like loud clubs.",
    );

    expect(
      result.any(
        (ExtractedPreferenceSignalCandidate item) =>
            item.category == 'hobby' &&
            item.polarity == PreferenceSignalPolarity.like,
      ),
      isTrue,
    );
    expect(
      result.any(
        (ExtractedPreferenceSignalCandidate item) =>
            item.category == 'environment' &&
            item.polarity == PreferenceSignalPolarity.dislike,
      ),
      isTrue,
    );
  });

  test('extracts allergy as high-confidence dislike signal', () {
    final List<ExtractedPreferenceSignalCandidate> result = extractor.extract(
      'I am allergic to peanuts, please remember that.',
    );

    final ExtractedPreferenceSignalCandidate signal = result.firstWhere(
      (ExtractedPreferenceSignalCandidate item) => item.key == 'health:peanuts',
    );
    expect(signal.polarity, PreferenceSignalPolarity.dislike);
    expect(signal.confidence, greaterThan(0.9));
  });
}