feat: implement mvp with email-first login flow and langgraph architecture

tests/test_config.py

@@ -0,0 +1,47 @@
+import pytest
+from pydantic import ValidationError
+from ea_chatbot.config import Settings, LLMConfig
+
+def test_default_settings():
+    """Test that default settings are loaded correctly."""
+    settings = Settings()
+    
+    # Check default config for query analyzer
+    assert isinstance(settings.query_analyzer_llm, LLMConfig)
+    assert settings.query_analyzer_llm.provider == "openai"
+    assert settings.query_analyzer_llm.model == "gpt-5-mini"
+    assert settings.query_analyzer_llm.temperature == 0.0
+
+    # Check default config for planner
+    assert isinstance(settings.planner_llm, LLMConfig)
+    assert settings.planner_llm.provider == "openai"
+    assert settings.planner_llm.model == "gpt-5-mini"
+
+def test_env_override(monkeypatch):
+    """Test that environment variables override defaults."""
+    monkeypatch.setenv("QUERY_ANALYZER_LLM__MODEL", "gpt-3.5-turbo")
+    monkeypatch.setenv("QUERY_ANALYZER_LLM__TEMPERATURE", "0.7")
+    
+    settings = Settings()
+    assert settings.query_analyzer_llm.model == "gpt-3.5-turbo"
+    assert settings.query_analyzer_llm.temperature == 0.7
+
+def test_provider_specific_params():
+    """Test that provider specific parameters can be set."""
+    config = LLMConfig(
+        provider="openai",
+        model="o1-preview",
+        provider_specific={"reasoning_effort": "high"}
+    )
+    assert config.provider_specific["reasoning_effort"] == "high"
+
+def test_oidc_settings(monkeypatch):
+    """Test OIDC settings configuration."""
+    monkeypatch.setenv("OIDC_CLIENT_ID", "test_client_id")
+    monkeypatch.setenv("OIDC_CLIENT_SECRET", "test_client_secret")
+    monkeypatch.setenv("OIDC_SERVER_METADATA_URL", "https://test.server/.well-known/openid-configuration")
+    
+    settings = Settings()
+    assert settings.oidc_client_id == "test_client_id"
+    assert settings.oidc_client_secret == "test_client_secret"
+    assert settings.oidc_server_metadata_url == "https://test.server/.well-known/openid-configuration"