Fix tests

infra_ai_service/demo.py

@@ -0,0 +1,16 @@
+def add(x, y):
+    return x + y
+
+
+def subtract(x, y):
+    return x - y
+
+
+def multiply(x, y):
+    return x * y
+
+
+def divide(x, y):
+    if y == 0:
+        raise ValueError("Cannot divide by zero!")
+    return x / y

tox.ini

@@ -29,7 +29,7 @@ commands =
 deps =
     coverage
 commands =
-    coverage report --fail-under=70  # 将阈值设置为80%
+    coverage report --fail-under=80
     coverage html
 
 [testenv:format]