from meshviz.main import app
from fastapi.testclient import TestClient

client = TestClient(app)


def test_delta_endpoint_creates_delta():
    resp = client.post("/delta/device1", json={"ts": 1.0, "value": 5.5})
    assert resp.status_code == 200
    data = resp.json()
    assert data["device"] == "device1"
    assert "delta_id" in data


def test_state_endpoint_returns_state():
    resp = client.get("/state")
    assert resp.status_code == 200
    assert isinstance(resp.json(), dict)