diff --git a/tests/unit/test_mock_asr_service.py b/tests/unit/test_mock_asr_service.py
new file mode 100755
index 000000000..6491c310d
--- /dev/null
+++ b/tests/unit/test_mock_asr_service.py
@@ -0,0 +1,191 @@
+"""MockASRService 单测 — Mock ASR服务纯逻辑部分."""
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from packages.adapters.asr.mock_asr_service import MockASRService
+from packages.ports.asr_service import ASRServiceError
+
+
+# ── Fixtures ────────────────────────────────────────────────────────────────
+
+
+@pytest.fixture
+def service():
+    return MockASRService()
+
+
+# ── transcribe 基础行为 ────────────────────────────────────────────────────────
+
+
+class TestTranscribeBasic:
+    """transcribe 基本行为."""
+
+    def test_audio_not_found_raises(self, service, tmp_path):
+        """音频文件不存在时抛 ASRServiceError."""
+        with pytest.raises(ASRServiceError):
+            service.transcribe(tmp_path / "nonexistent.wav")
+
+    def test_default_mock_text_produces_timeline(self, service, tmp_path):
+        """不传 mock_text 时生成默认测试字幕."""
+        audio = tmp_path / "test.wav"
+        audio.write_bytes(b"fake audio")
+
+        timeline = service.transcribe(audio)
+
+        assert timeline is not None
+        assert timeline.language == "zh"
+        assert timeline.total_duration > 0
+        assert len(timeline.segments) > 0
+
+    def test_custom_mock_text(self, tmp_path):
+        """使用自定义 mock_text."""
+        text = "你好世界。今天天气真好！"
+        service = MockASRService(mock_text=text)
+        audio = tmp_path / "test.wav"
+        audio.write_bytes(b"fake audio")
+
+        timeline = service.transcribe(audio)
+
+        assert timeline.total_duration > 0
+        # 两句话，应该有2个segment
+        assert len(timeline.segments) == 2
+        assert "你好世界" in timeline.segments[0].text
+        assert "今天天气真好" in timeline.segments[1].text
+
+    def test_reads_txt_file(self, tmp_path):
+        """音频同目录同名 txt 文件存在时，读取其内容."""
+        audio = tmp_path / "voice.wav"
+        audio.write_bytes(b"fake audio")
+        txt = tmp_path / "voice.txt"
+        txt.write_text("这是从文件读取的。内容。", encoding="utf-8")
+
+        service = MockASRService()
+        timeline = service.transcribe(audio)
+
+        assert len(timeline.segments) == 2
+        assert "从文件读取" in timeline.segments[0].text
+
+    def test_mock_text_takes_priority_over_txt(self, tmp_path):
+        """mock_text 参数优先于 txt 文件."""
+        audio = tmp_path / "test.wav"
+        audio.write_bytes(b"fake audio")
+        txt = tmp_path / "test.txt"
+        txt.write_text("文件里的文字。", encoding="utf-8")
+
+        service = MockASRService(mock_text="自定义的。优先！")
+        timeline = service.transcribe(audio)
+
+        assert "自定义的" in timeline.segments[0].text
+        assert "文件" not in timeline.segments[0].text
+
+    def test_custom_language(self, service, tmp_path):
+        """可以指定语言."""
+        audio = tmp_path / "test.wav"
+        audio.write_bytes(b"fake audio")
+        timeline = service.transcribe(audio, language="en")
+        assert timeline.language == "en"
+
+
+# ── _text_to_segments 切分逻辑 ──────────────────────────────────────────
+
+
+class TestTextToSegments:
+    """_text_to_segments 文本切分逻辑."""
+
+    def setup_method(self):
+        self.service = MockASRService()
+
+    def test_split_by_chinese_period(self):
+        """按中文句号切分."""
+        text = "第一句。第二句。第三句。"
+        segments = self.service._text_to_segments(text, 10.0, with_word_timestamps=False)
+        assert len(segments) == 3
+
+    def test_split_by_exclamation(self):
+        """按感叹号切分."""
+        text = "你好！世界！"
+        segments = self.service._text_to_segments(text, 5.0, with_word_timestamps=False)
+        assert len(segments) == 2
+
+    def test_split_by_question_mark(self):
+        """按问号切分."""
+        text = "你好吗？我很好。"
+        segments = self.service._text_to_segments(text, 5.0, with_word_timestamps=False)
+        assert len(segments) == 2
+
+    def test_mixed_punctuation(self):
+        """混合标点."""
+        text = "你好！你是谁？我是测试。再见!"
+        segments = self.service._text_to_segments(text, 10.0, with_word_timestamps=False)
+        assert len(segments) == 4
+
+    def test_empty_text_returns_empty(self):
+        """空文本返回空列表."""
+        segments = self.service._text_to_segments("", 5.0, with_word_timestamps=False)
+        assert segments == []
+
+    def test_no_punctuation_single_segment(self):
+        """没有标点时整段作为一个segment."""
+        text = "这是一段没有标点的文字"
+        segments = self.service._text_to_segments(text, 5.0, with_word_timestamps=False)
+        assert len(segments) == 1
+        assert segments[0].text == text
+
+    def test_segments_duration_adds_up(self):
+        """所有segment时长加起来约等于总时长."""
+        text = "第一句。第二句。"
+        total = 10.0
+        segments = self.service._text_to_segments(text, total, with_word_timestamps=False)
+        sum_duration = sum(s.end - s.start for s in segments)
+        assert abs(sum_duration - total) < 0.01
+
+    def test_segments_sequential(self):
+        """segment按顺序排列，首尾相接."""
+        text = "第一句。第二句。第三句。"
+        segments = self.service._text_to_segments(text, 9.0, with_word_timestamps=False)
+
+        assert segments[0].start == 0.0
+        for i in range(1, len(segments)):
+            assert abs(segments[i].start - segments[i - 1].end) < 0.001
+
+    def test_with_word_timestamps(self):
+        """带词级时间戳时，每个字一个word."""
+        text = "你好世界！"
+        segments = self.service._text_to_segments(text, 2.0, with_word_timestamps=True)
+
+        assert len(segments) == 1
+        # 4个汉字 + 1个感叹号 = 5个字符
+        assert len(segments[0].words) == 5
+
+    def test_word_timestamps_sequential(self):
+        """词级时间戳按顺序排列."""
+        text = "你好！"
+        segments = self.service._text_to_segments(text, 3.0, with_word_timestamps=True)
+
+        words = segments[0].words
+        assert len(words) == 3
+        assert words[0].start == 0.0
+        # 最后一个词的结束时间约等于 segment 结束时间
+        assert abs(words[-1].end - segments[0].end) < 0.01
+
+    def test_without_word_timestamps(self):
+        """不带词级时间戳时，words为空."""
+        text = "你好世界。"
+        segments = self.service._text_to_segments(text, 2.0, with_word_timestamps=False)
+
+        assert len(segments) == 1
+        assert segments[0].words == []
+
+    def test_duration_proportional_to_length(self):
+        """长句子占时长，短句子占时短."""
+        text = "短。很长很长很长很长的句子。"
+        segments = self.service._text_to_segments(text, 10.0, with_word_timestamps=False)
+
+        # 第一句1个字，第二句9个字（包括标点)
+        # 第一句时长应该比第二句短
+        dur0 = segments[0].end - segments[0].start
+        dur1 = segments[1].end - segments[1].start
+        assert dur1 > dur0  # 第二句更长
diff --git a/tests/unit/test_mock_tts_service.py b/tests/unit/test_mock_tts_service.py
new file mode 100755
index 000000000..59c9cfd9f
--- /dev/null
+++ b/tests/unit/test_mock_tts_service.py
@@ -0,0 +1,143 @@
+"""MockTtsService 单测 — Mock TTS服务纯逻辑部分."""
+from __future__ import annotations
+
+import pytest
+
+from packages.adapters.tts.mock_tts_service import MockTtsService, _CHARS_PER_SECOND
+
+
+# ── Fixtures ────────────────────────────────────────────────────────────────
+
+
+@pytest.fixture
+def service():
+    return MockTtsService()
+
+
+# ── estimate_duration ──────────────────────────────────────────────────────
+
+
+class TestEstimateDuration:
+    """estimate_duration 时长估算."""
+
+    def test_empty_text_returns_zero(self, service):
+        assert service.estimate_duration("") == 0.0
+
+    def test_whitespace_only_returns_zero(self, service):
+        assert service.estimate_duration("   \n\t  ") == 0.0
+
+    def test_single_char(self, service):
+        result = service.estimate_duration("你")
+        assert abs(result - 1.0 / _CHARS_PER_SECOND) < 0.001
+
+    def test_default_speed(self, service):
+        """默认 speed=1.0."""
+        text = "你好世界"  # 4个字
+        result = service.estimate_duration(text)
+        expected = 4.0 / _CHARS_PER_SECOND
+        assert abs(result - expected) < 0.001
+
+    def test_faster_speed_shortens_duration(self, service):
+        """语速越快，时长越短."""
+        text = "你好世界"
+        normal = service.estimate_duration(text, speed=1.0)
+        fast = service.estimate_duration(text, speed=2.0)
+        assert fast < normal
+        assert abs(fast - normal / 2) < 0.001
+
+    def test_slower_speed_lengthens_duration(self, service):
+        """语速越慢，时长越长."""
+        text = "你好世界"
+        normal = service.estimate_duration(text, speed=1.0)
+        slow = service.estimate_duration(text, speed=0.5)
+        assert slow > normal
+        assert abs(slow - normal / 0.5) < 0.001
+
+    def test_speed_clamped_at_minimum(self, service):
+        """speed < 0.1 时被钳制到 0.1，避免除零."""
+        text = "你好"
+        # 传一个极小的值，不应该崩溃，且时长不会无限大
+        result = service.estimate_duration(text, speed=0.001)
+        assert result > 0
+        # 应该等同于 speed=0.1
+        expected = 2.0 / _CHARS_PER_SECOND / 0.1
+        assert abs(result - expected) < 0.001
+
+    def test_chinese_and_english_mixed(self, service):
+        """中英文混合时按非空白字符计数."""
+        text = "Hello 世界"  # H-e-l-l-o + 世-界 = 7个非空白字符
+        result = service.estimate_duration(text)
+        expected = 7.0 / _CHARS_PER_SECOND
+        assert abs(result - expected) < 0.001
+
+    def test_negative_speed(self, service):
+        """负语速按最小处理（取 max(0.1, speed)）."""
+        text = "你好"
+        result = service.estimate_duration(text, speed=-2.0)
+        assert result > 0
+        # 等同于 speed=0.1
+        expected = 2.0 / _CHARS_PER_SECOND / 0.1
+        assert abs(result - expected) < 0.001
+
+
+# ── _extract_freq ──────────────────────────────────────────────────────────
+
+
+class TestExtractFreq:
+    """_extract_freq 基频提取."""
+
+    def test_sine_prefix_returns_freq(self, service):
+        """sine_ 前缀的voice_id，从下划线后提取频率."""
+        result = service._extract_freq("sine_440", "female")
+        assert result == 440.0
+
+    def test_sine_with_decimal(self, service):
+        """支持小数频率."""
+        result = service._extract_freq("sine_261.63", "female")
+        assert abs(result - 261.63) < 0.001
+
+    def test_sine_invalid_number_falls_back(self, service):
+        """sine_ 后面不是数字时，fallback 到性别默认值."""
+        result = service._extract_freq("sine_abc", "female")
+        assert result == 220.0  # female 默认
+
+    def test_sine_no_number_falls_back(self, service):
+        """sine_ 后面没有内容时，fallback."""
+        result = service._extract_freq("sine_", "male")
+        assert result == 120.0  # male 默认
+
+    def test_male_default(self, service):
+        result = service._extract_freq("some_voice", "male")
+        assert result == 120.0
+
+    def test_female_default(self, service):
+        result = service._extract_freq("some_voice", "female")
+        assert result == 220.0
+
+    def test_child_default(self, service):
+        result = service._extract_freq("some_voice", "child")
+        assert result == 350.0
+
+    def test_unknown_gender_defaults_to_female(self, service):
+        """未知性别 fallback 到 female."""
+        result = service._extract_freq("some_voice", "alien")
+        assert result == 220.0
+
+    def test_empty_gender_defaults_to_female(self, service):
+        result = service._extract_freq("some_voice", "")
+        assert result == 220.0
+
+
+# ── provider_name / available_voices ───────────────────────────────────────
+
+
+class TestProviderInfo:
+    """provider_name 和 available_voices."""
+
+    def test_provider_name(self, service):
+        assert service.provider_name == "mock"
+
+    def test_available_voices_returns_list(self, service):
+        voices = service.available_voices()
+        assert isinstance(voices, list)
+        assert len(voices) > 0
diff --git a/tests/unit/test_tts_service_factory.py b/tests/unit/test_tts_service_factory.py
new file mode 100755
index 000000000..22f29f0cd
--- /dev/null
+++ b/tests/unit/test_tts_service_factory.py
@@ -0,0 +1,138 @@
+"""TTS Service Factory 单测 — TTS服务工厂."""
+from __future__ import annotations
+
+import os
+from unittest.mock import patch
+
+import pytest
+
+# 注意：工厂模块有全局状态（_PROVIDERS），每个测试前重置
+from services.tts_service_factory import (
+    _PROVIDERS,
+    available_providers,
+    get_tts_service,
+    register_provider,
+)
+
+
+# ── Fixtures ────────────────────────────────────────────────────────────────
+
+
+@pytest.fixture(autouse=True)
+def reset_providers():
+    """每个测试前后重置 provider 注册表."""
+    # 保存原始状态
+    original = dict(_PROVIDERS)
+    yield
+    # 恢复
+    _PROVIDERS.clear()
+    _PROVIDERS.update(original)
+
+
+# ── register_provider ──────────────────────────────────────────────────────
+
+
+class TestRegisterProvider:
+    """register_provider 注册供应商."""
+
+    def test_register_new_provider(self):
+        class DummyService:
+            pass
+
+        register_provider("dummy", DummyService)
+        assert "dummy" in _PROVIDERS
+        assert _PROVIDERS["dummy"] is DummyService
+
+    def test_register_overwrites_existing(self):
+        class ServiceV1:
+            pass
+
+        class ServiceV2:
+            pass
+
+        register_provider("test", ServiceV1)
+        register_provider("test", ServiceV2)
+        assert _PROVIDERS["test"] is ServiceV2
+
+
+# ── get_tts_service ───────────────────────────────────────────────────────
+
+
+class TestGetTtsService:
+    """get_tts_service 获取TTS服务."""
+
+    def test_get_mock_provider(self):
+        """mock 供应商可用."""
+        service = get_tts_service("mock")
+        assert service is not None
+        assert service.provider_name == "mock"
+
+    def test_get_cosyvoice_provider(self):
+        """cosyvoice 别名映射到 CosyVoiceTtsService."""
+        # 不传 api_key 也能实例化（默认空字符串）
+        service = get_tts_service("cosyvoice")
+        assert service is not None
+        assert service.provider_name == "cosyvoice"
+
+    def test_aliyun_alias_maps_to_cosyvoice(self):
+        """aliyun 是 cosyvoice 的别名."""
+        service = get_tts_service("aliyun")
+        assert service.provider_name == "cosyvoice"
+
+    def test_dashscope_alias_maps_to_cosyvoice(self):
+        """dashscope 是 cosyvoice 的别名."""
+        service = get_tts_service("dashscope")
+        assert service.provider_name == "cosyvoice"
+
+    def test_unknown_provider_falls_back_to_mock(self):
+        """未知供应商回退到 mock."""
+        service = get_tts_service("unknown_provider_xyz")
+        assert service.provider_name == "mock"
+
+    def test_provider_name_case_insensitive(self):
+        """供应商名称不区分大小写."""
+        service = get_tts_service("MOCK")
+        assert service.provider_name == "mock"
+
+    def test_passes_kwargs_to_constructor(self):
+        """kwargs 传递给服务构造函数."""
+        # MockTtsService 接受 ffmpeg_bin 参数
+        service = get_tts_service("mock", ffmpeg_bin="/custom/ffmpeg")
+        assert service is not None
+
+    def test_none_provider_reads_env_var(self):
+        """provider=None 时从 TTS_PROVIDER 环境变量读取."""
+        with patch.dict(os.environ, {"TTS_PROVIDER": "mock"}):
+            service = get_tts_service(None)
+            assert service.provider_name == "mock"
+
+    def test_empty_env_falls_back_to_auto_detect(self):
+        """环境变量为空时自动检测."""
+        with patch.dict(os.environ, {"TTS_PROVIDER": ""}):
+            # 没有 cosyvoice_api_key 时应该用 mock
+            service = get_tts_service(None)
+            assert service.provider_name == "mock"
+
+
+# ── available_providers ────────────────────────────────────────────────────
+
+
+class TestAvailableProviders:
+    """available_providers 可用供应商列表."""
+
+    def test_returns_list(self):
+        result = available_providers()
+        assert isinstance(result, list)
+        assert len(result) >= 1  # 至少有 mock
+
+    def test_mock_is_always_available(self):
+        result = available_providers()
+        assert "mock" in result
+
+    def test_after_register_appears_in_list(self):
+        class Dummy:
+            pass
+
+        register_provider("dummy_test", Dummy)
+        result = available_providers()
+        assert "dummy_test" in result