test: add E2E tests for KJB strategy, backtest, and signal endpoints

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/tests/e2e/test_kjb_flow.py

@@ -0,0 +1,74 @@
+"""
+E2E tests for KJB strategy flow.
+"""
+from fastapi.testclient import TestClient
+
+
+def test_kjb_strategy_endpoint(client: TestClient, auth_headers):
+    """Test KJB strategy ranking endpoint."""
+    response = client.post(
+        "/api/strategy/kjb",
+        json={
+            "universe": {"markets": ["KOSPI"]},
+            "top_n": 10,
+        },
+        headers=auth_headers,
+    )
+    assert response.status_code in [200, 400, 500]
+    if response.status_code == 200:
+        data = response.json()
+        assert data["strategy_name"] == "kjb"
+        assert "stocks" in data
+
+
+def test_kjb_backtest_creation(client: TestClient, auth_headers):
+    """Test creating a KJB backtest."""
+    response = client.post(
+        "/api/backtest",
+        json={
+            "strategy_type": "kjb",
+            "strategy_params": {
+                "max_positions": 10,
+                "cash_reserve_ratio": 0.3,
+                "stop_loss_pct": 0.03,
+                "target1_pct": 0.05,
+                "target2_pct": 0.10,
+            },
+            "start_date": "2023-01-01",
+            "end_date": "2023-12-31",
+            "initial_capital": 10000000,
+            "commission_rate": 0.00015,
+            "slippage_rate": 0.001,
+            "benchmark": "KOSPI",
+            "top_n": 30,
+        },
+        headers=auth_headers,
+    )
+    assert response.status_code == 200
+    data = response.json()
+    assert "id" in data
+    assert data["status"] == "pending"
+
+
+def test_signal_today_endpoint(client: TestClient, auth_headers):
+    """Test today's signals endpoint."""
+    response = client.get("/api/signal/kjb/today", headers=auth_headers)
+    assert response.status_code == 200
+    assert isinstance(response.json(), list)
+
+
+def test_signal_history_endpoint(client: TestClient, auth_headers):
+    """Test signal history endpoint."""
+    response = client.get(
+        "/api/signal/kjb/history",
+        params={"limit": 10},
+        headers=auth_headers,
+    )
+    assert response.status_code == 200
+    assert isinstance(response.json(), list)
+
+
+def test_signal_requires_auth(client: TestClient):
+    """Test that signal endpoints require authentication."""
+    response = client.get("/api/signal/kjb/today")
+    assert response.status_code == 401