test: use errno.ENOENT for command not found assertion

.github/workflows/pre-commit.yml

@@ -0,0 +1,25 @@
+name: Pre-commit Checks
+
+on:
+  push:
+    branches: [ main, master, develop ]  # 根据您的分支名调整
+  pull_request:
+    branches: [ main, master, develop ]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.x'  # 指定您的Python版本
+
+    - name: Install pre-commit
+      run: pip install pre-commit
+
+    - name: Run pre-commit on all files
+      run: pre-commit run --all-files

tests/client/test_stdio.py

@@ -6,6 +6,7 @@
 import time
 
 import anyio
+import errno
 import pytest
 
 from mcp.client.session import ClientSession
@@ -94,13 +95,8 @@ async def test_stdio_client_nonexistent_command():
         async with stdio_client(server_params) as (_, _):
             pass
 
-    # The error should indicate the command was not found
-    error_message = str(exc_info.value)
-    assert (
-        "nonexistent" in error_message
-        or "not found" in error_message.lower()
-        or "cannot find the file" in error_message.lower()  # Windows error message
-    )
+    # The error should indicate the command was not found (ENOENT: No such file or directory)
+    assert exc_info.value.errno == errno.ENOENT
 
 
 @pytest.mark.anyio