整理: mock TTS engine テストを pytest 化 (#1274)

* refactor: mock TTS engine テストを pytest 化

* fix: 型間違いと lint を修正

test/test_mock_tts_engine.py

@@ -1,5 +1,3 @@
-from unittest import TestCase
-
 from voicevox_engine.dev.tts_engine.mock import MockTTSEngine
 from voicevox_engine.metas.Metas import StyleId
 from voicevox_engine.model import AccentPhrase, AudioQuery, Mora
@@ -18,57 +16,59 @@ def _gen_mora(text: str, consonant: str | None, vowel: str) -> Mora:
     )
 
 
-class TestMockTTSEngine(TestCase):
-    def setUp(self) -> None:
-        super().setUp()
+def _gen_accent_phrases() -> list[AccentPhrase]:
+    return [
+        AccentPhrase(
+            moras=[
+                _gen_mora("コ", "k", "o"),
+                _gen_mora("ン", None, "N"),
+                _gen_mora("ニ", "n", "i"),
+                _gen_mora("チ", "ch", "i"),
+                _gen_mora("ワ", "w", "a"),
+            ],
+            accent=5,
+            pause_mora=_gen_mora("、", None, "pau"),
+        ),
+        AccentPhrase(
+            moras=[
+                _gen_mora("ヒ", "h", "i"),
+                _gen_mora("ホ", "h", "o"),
+                _gen_mora("デ", "d", "e"),
+                _gen_mora("ス", "s", "U"),
+            ],
+            accent=1,
+            pause_mora=None,
+        ),
+    ]
+
 
-        self.accent_phrases_hello_hiho = [
-            AccentPhrase(
-                moras=[
-                    _gen_mora("コ", "k", "o"),
-                    _gen_mora("ン", None, "N"),
-                    _gen_mora("ニ", "n", "i"),
-                    _gen_mora("チ", "ch", "i"),
-                    _gen_mora("ワ", "w", "a"),
-                ],
-                accent=5,
-                pause_mora=_gen_mora("、", None, "pau"),
-            ),
-            AccentPhrase(
-                moras=[
-                    _gen_mora("ヒ", "h", "i"),
-                    _gen_mora("ホ", "h", "o"),
-                    _gen_mora("デ", "d", "e"),
-                    _gen_mora("ス", "s", "U"),
-                ],
-                accent=1,
-                pause_mora=None,
-            ),
-        ]
-        self.engine = MockTTSEngine()
+def test_update_length() -> None:
+    """`.update_length()` がエラー無く生成をおこなう"""
+    engine = MockTTSEngine()
+    engine.update_length(_gen_accent_phrases(), StyleId(0))
 
-    def test_update_length(self) -> None:
-        """`.update_length()` がエラー無く生成をおこなう"""
-        self.engine.update_length(self.accent_phrases_hello_hiho, StyleId(0))
 
-    def test_update_pitch(self) -> None:
-        """`.update_pitch()` がエラー無く生成をおこなう"""
-        self.engine.update_pitch(self.accent_phrases_hello_hiho, StyleId(0))
+def test_update_pitch() -> None:
+    """`.update_pitch()` がエラー無く生成をおこなう"""
+    engine = MockTTSEngine()
+    engine.update_pitch(_gen_accent_phrases(), StyleId(0))
 
-    def test_synthesize_wave(self) -> None:
-        """`.synthesize_wave()` がエラー無く生成をおこなう"""
-        self.engine.synthesize_wave(
-            AudioQuery(
-                accent_phrases=self.accent_phrases_hello_hiho,
-                speedScale=1,
-                pitchScale=0,
-                intonationScale=1,
-                volumeScale=1,
-                prePhonemeLength=0.1,
-                postPhonemeLength=0.1,
-                outputSamplingRate=24000,
-                outputStereo=False,
-                kana=create_kana(self.accent_phrases_hello_hiho),
-            ),
-            StyleId(0),
-        )
+
+def test_synthesize_wave() -> None:
+    """`.synthesize_wave()` がエラー無く生成をおこなう"""
+    engine = MockTTSEngine()
+    engine.synthesize_wave(
+        AudioQuery(
+            accent_phrases=_gen_accent_phrases(),
+            speedScale=1,
+            pitchScale=0,
+            intonationScale=1,
+            volumeScale=1,
+            prePhonemeLength=0.1,
+            postPhonemeLength=0.1,
+            outputSamplingRate=24000,
+            outputStereo=False,
+            kana=create_kana(_gen_accent_phrases()),
+        ),
+        StyleId(0),
+    )