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tests/test_web_dashboard.py

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+"""FastAPI dashboard endpoint smoke tests."""
+from __future__ import annotations
+
+import pytest
+from fastapi.testclient import TestClient
+
+from arbitrage.web.app import create_app
+
+
+@pytest.fixture
+def client(_tmp_arb_env):
+    app = create_app()
+    with TestClient(app) as c:
+        yield c
+
+
+def test_index_renders(client) -> None:
+    r = client.get("/")
+    assert r.status_code == 200
+    assert "arbitrage" in r.text
+    assert "paper" in r.text
+
+
+def test_pnl_fragment_renders(client) -> None:
+    r = client.get("/fragments/pnl")
+    assert r.status_code == 200
+    assert "paper pnl" in r.text
+
+
+def test_opportunities_fragment_empty_state(client) -> None:
+    r = client.get("/fragments/opportunities")
+    assert r.status_code == 200
+    assert "no opportunities yet" in r.text
+
+
+def test_baskets_fragment_empty_state(client) -> None:
+    r = client.get("/fragments/baskets")
+    assert r.status_code == 200
+    assert "no baskets yet" in r.text
+
+
+def test_kill_toggle_round_trip(client, _tmp_arb_env) -> None:
+    import arbitrage.config as cfg
+
+    assert not cfg.settings.kill_switch_file.exists()
+    r = client.post("/kill")
+    assert r.status_code == 200
+    assert "KILL SWITCH ACTIVE" in r.text
+    assert cfg.settings.kill_switch_file.exists()
+    r = client.post("/unkill")
+    assert r.status_code == 200
+    assert "KILL SWITCH ACTIVE" not in r.text
+    assert not cfg.settings.kill_switch_file.exists()