chore(Makefile): update test command to use uv run for better compatibility

feat(tests): add test cases for ShellExecutor's pipe command functionality to ensure correct execution and error handling

Author: tumf

Makefile

@@ -2,8 +2,7 @@
 .DEFAULT_GOAL := all
 
 test:
-	pip install -e .
-	pytest
+	uv run pytest
 
 format:
 	black .

tests/test_shell_executor_pipe.py

@@ -0,0 +1,26 @@
+import pytest
+
+from mcp_shell_server.shell_executor import ShellExecutor
+
+
+@pytest.fixture
+def executor():
+    return ShellExecutor()
+
+
+@pytest.mark.asyncio
+async def test_basic_pipe_command(executor, monkeypatch):
+    """Test basic pipe functionality with allowed commands"""
+    monkeypatch.setenv("ALLOW_COMMANDS", "echo,grep")
+    result = await executor.execute(["echo", "hello world", "|", "grep", "world"])
+    assert result["status"] == 0
+    assert result["stdout"].strip() == "hello world"
+
+
+@pytest.mark.asyncio
+async def test_invalid_pipe_command(executor, monkeypatch):
+    """Test pipe command with non-allowed command"""
+    monkeypatch.setenv("ALLOW_COMMANDS", "echo")
+    result = await executor.execute(["echo", "hello", "|", "grep", "hello"])
+    assert result["status"] == 1
+    assert "Command not allowed: grep" in result["error"]