fix(tos): set default bucket name for VeTOS class

Author: Fengrui-Liu

tests/test_knowledgebase.py

@@ -29,13 +29,3 @@ async def test_knowledgebase():
     )
 
     assert isinstance(kb._backend, InMemoryKnowledgeBackend)
-
-
-@pytest.mark.asyncio
-async def test_viking_knowledgebase_add_texts():
-    app_name = "kb_test_app"
-    kb = KnowledgeBase(
-        backend="viking",
-        app_name=app_name,
-    )
-    assert kb.add_from_text(text="test text", tag="tag") is True

veadk/integrations/ve_tos/ve_tos.py

@@ -37,7 +37,7 @@ def __init__(
         ak: str = "",
         sk: str = "",
         region: str = "cn-beijing",
-        bucket_name: str = "",
+        bucket_name: str = DEFAULT_TOS_BUCKET_NAME,
     ) -> None:
         self.ak = ak if ak else os.getenv("VOLCENGINE_ACCESS_KEY", "")
         self.sk = sk if sk else os.getenv("VOLCENGINE_SECRET_KEY", "")
@@ -49,10 +49,9 @@ def __init__(
             )
 
         self.region = region
-        self.bucket_name = bucket_name or getenv(
-            "DATABASE_TOS_BUCKET", DEFAULT_TOS_BUCKET_NAME
+        self.bucket_name = (
+            bucket_name if bucket_name else getenv("", DEFAULT_TOS_BUCKET_NAME)
         )
-
         self._tos_module = None
 
         try: