starpivot/apps/client/test/translation_direction_test.dart

import 'package:eaimar/modules/translation/models/translation_direction.dart';
import 'package:flutter_test/flutter_test.dart';

const zh = 'zh-CN';
const en = 'en-US';

void main() {
  group('单向模式：同声翻译 / 多媒体翻译', () {
    for (final mode in ['simultaneous', 'audioVideo']) {
      test('$mode 永远是 源→目标，与 ASR 报的语种无关', () {
        // ASR 报对了
        expect(
          resolveTranslationDirection(
              mode: mode,
              sourceCode: zh,
              targetCode: en,
              detectedLanguageCode: zh),
          const TranslationDirection(zh, en),
        );
        // ASR 没报（空串）—— 老实现在这里会判成反向
        expect(
          resolveTranslationDirection(
              mode: mode, sourceCode: zh, targetCode: en),
          const TranslationDirection(zh, en),
        );
        // ASR 报成了目标语言 —— 老实现同样会反向
        expect(
          resolveTranslationDirection(
              mode: mode,
              sourceCode: zh,
              targetCode: en,
              detectedLanguageCode: en),
          const TranslationDirection(zh, en),
        );
        // 大小写/地区不一致
        expect(
          resolveTranslationDirection(
              mode: mode,
              sourceCode: zh,
              targetCode: en,
              detectedLanguageCode: 'zh'),
          const TranslationDirection(zh, en),
        );
      });
    }

    test('换了语言对照样只认源→目标', () {
      expect(
        resolveTranslationDirection(
            mode: 'simultaneous', sourceCode: en, targetCode: zh),
        const TranslationDirection(en, zh),
      );
    });
  });

  group('面对面仍是双向', () {
    test('说话人 1 → 源到目标；说话人 2 → 目标到源', () {
      expect(
        resolveTranslationDirection(
            mode: 'faceToFace', sourceCode: zh, targetCode: en, speaker: 1),
        const TranslationDirection(zh, en),
      );
      expect(
        resolveTranslationDirection(
            mode: 'faceToFace', sourceCode: zh, targetCode: en, speaker: 2),
        const TranslationDirection(en, zh),
      );
    });

    test('说话人未知时才看 ASR 检测结果', () {
      expect(
        resolveTranslationDirection(
            mode: 'faceToFace',
            sourceCode: zh,
            targetCode: en,
            detectedLanguageCode: en),
        const TranslationDirection(en, zh),
      );
    });
  });

  test('isOneWayTranslationMode 只覆盖这两个模式', () {
    expect(isOneWayTranslationMode('simultaneous'), isTrue);
    expect(isOneWayTranslationMode('audioVideo'), isTrue);
    expect(isOneWayTranslationMode('faceToFace'), isFalse);
    expect(isOneWayTranslationMode('call'), isFalse);
  });
}