add conftest.py with fixtures to prevent CI hangs

tests/conftest.py

@@ -0,0 +1,67 @@
+"""Shared pytest fixtures that prevent CI hangs when API keys are absent."""
+
+import os
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+# ---------------------------------------------------------------------------
+# Custom markers
+# ---------------------------------------------------------------------------
+
+
+def pytest_configure(config):
+    for marker in ("unit", "integration", "smoke"):
+        config.addinivalue_line("markers", f"{marker}: {marker}-level tests")
+
+
+# ---------------------------------------------------------------------------
+# Auto-use: placeholder API keys so LLM client init never blocks
+# ---------------------------------------------------------------------------
+
+_API_KEY_ENV_VARS = [
+    "OPENAI",
+    "GOOGLE",
+    "ANTHROPIC",
+    "XAI",
+    "ALPHA_VANTAGE",
+]
+
+
+@pytest.fixture(autouse=True)
+def _dummy_api_keys(monkeypatch):
+    for provider in _API_KEY_ENV_VARS:
+        env_var = f"{provider}_API_KEY"
+        monkeypatch.setenv(env_var, os.environ.get(env_var, "placeholder"))
+
+
+# ---------------------------------------------------------------------------
+# Auto-use: safe DEFAULT_CONFIG override (no real API calls)
+# ---------------------------------------------------------------------------
+
+_SAFE_CONFIG = {
+    "llm_provider": "openai",
+    "deep_think_llm": "gpt-5.4-mini",
+    "quick_think_llm": "gpt-5.4-mini",
+    "max_debate_rounds": 1,
+    "max_risk_discuss_rounds": 1,
+}
+
+
+@pytest.fixture(autouse=True)
+def _safe_default_config():
+    with patch.dict("tradingagents.default_config.DEFAULT_CONFIG", _SAFE_CONFIG):
+        yield
+
+
+# ---------------------------------------------------------------------------
+# Reusable mock LLM client
+# ---------------------------------------------------------------------------
+
+
+@pytest.fixture()
+def mock_llm_client():
+    client = MagicMock()
+    client.get_llm.return_value = MagicMock()
+    with patch("tradingagents.llm_clients.create_llm_client", return_value=client):
+        yield client