refactor(python): move tests into python/tests/ directory

python/pyproject.toml

@@ -81,7 +81,7 @@ exclude = [
 ]
 
 [tool.pytest.ini_options]
-testpaths = ["."]
+testpaths = ["tests"]
 python_files = "test_*.py"
 python_classes = "Test*"
 python_functions = "test_*"

python/e2e/testharness/context.py → python/tests/e2e/testharness/context.py

@@ -13,22 +13,21 @@
 
 from copilot import CopilotClient
 
-from .proxy import CapiProxy
+from .proxy import BASE_DIR, CapiProxy
 
 
 def get_cli_path_for_tests() -> str:
     """Get CLI path for E2E tests. Uses node_modules CLI during development."""
     # Look for CLI in sibling nodejs directory's node_modules
-    base_path = Path(__file__).parents[3]
-    full_path = base_path / "nodejs" / "node_modules" / "@github" / "copilot" / "index.js"
+    full_path = BASE_DIR / "nodejs" / "node_modules" / "@github" / "copilot" / "index.js"
     if full_path.exists():
         return str(full_path.resolve())
 
     raise RuntimeError("CLI not found for tests. Run 'npm install' in the nodejs directory.")
 
 
 CLI_PATH = get_cli_path_for_tests()
-SNAPSHOTS_DIR = Path(__file__).parents[3] / "test" / "snapshots"
+SNAPSHOTS_DIR = BASE_DIR / "test" / "snapshots"
 
 
 class E2ETestContext:

python/e2e/testharness/proxy.py → python/tests/e2e/testharness/proxy.py

@@ -6,13 +6,16 @@
 """
 
 import os
+import pathlib
 import platform
 import re
 import subprocess
 from typing import Any, Optional
 
 import httpx
 
+BASE_DIR = pathlib.Path(__file__).parents[4]
+
 
 class CapiProxy:
     """Manages a replaying proxy server for E2E tests."""
@@ -27,9 +30,7 @@ async def start(self) -> str:
             return self._proxy_url
 
         # The harness server is in the shared test directory
-        server_path = os.path.join(
-            os.path.dirname(__file__), "..", "..", "..", "test", "harness", "server.ts"
-        )
+        server_path = os.path.join(BASE_DIR / "test" / "harness" / "server.ts")
         server_path = os.path.abspath(server_path)
 
         # On Windows, use shell=True to find npx

python/test_client.py → python/tests/test_client.py

@@ -5,9 +5,9 @@
 """
 
 import pytest
+from e2e.testharness import CLI_PATH
 
 from copilot import CopilotClient
-from e2e.testharness import CLI_PATH
 
 
 class TestHandleToolCallRequest: