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

tests/test_history_models.py

@@ -0,0 +1,55 @@
+import pytest
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, DeclarativeBase
+
+# We anticipate these imports will fail initially
+try:
+    from ea_chatbot.history.models import Base, User, Conversation, Message, Plot
+except ImportError:
+    Base = None
+    User = None
+    Conversation = None
+    Message = None
+    Plot = None
+
+def test_models_exist():
+    assert User is not None, "User model not found"
+    assert Conversation is not None, "Conversation model not found"
+    assert Message is not None, "Message model not found"
+    assert Plot is not None, "Plot model not found"
+    assert Base is not None, "Base declarative class not found"
+
+def test_user_model_columns():
+    if not User: pytest.fail("User model undefined")
+    # Basic check if columns exist (by inspecting __table__.columns)
+    columns = User.__table__.columns.keys()
+    assert "id" in columns
+    assert "username" in columns
+    assert "password_hash" in columns
+    assert "display_name" in columns
+
+def test_conversation_model_columns():
+    if not Conversation: pytest.fail("Conversation model undefined")
+    columns = Conversation.__table__.columns.keys()
+    assert "id" in columns
+    assert "user_id" in columns
+    assert "data_state" in columns
+    assert "name" in columns
+    assert "summary" in columns
+    assert "created_at" in columns
+
+def test_message_model_columns():
+    if not Message: pytest.fail("Message model undefined")
+    columns = Message.__table__.columns.keys()
+    assert "id" in columns
+    assert "role" in columns
+    assert "content" in columns
+    assert "conversation_id" in columns
+    assert "created_at" in columns
+
+def test_plot_model_columns():
+    if not Plot: pytest.fail("Plot model undefined")
+    columns = Plot.__table__.columns.keys()
+    assert "id" in columns
+    assert "message_id" in columns
+    assert "image_data" in columns