"""A figure that counts things names what it counts in the alert about it
(#6400): the plugin recording it registers how, and a lookup that fails
leaves the alert to go out without names."""
from steward.core import alerts


async def test_a_registered_count_is_named_and_others_are_not(monkeypatch):
    monkeypatch.setattr(alerts, "_NAMED", {})

    async def short(session, resource):
        return [f"{resource}: api (0 of 1 running)"]

    alerts.names_behind("docker", "swarm_services_short", short)
    assert await alerts.which(None, "docker", "swarm_services_short", "swarm") == ["swarm: api (0 of 1 running)"]
    assert await alerts.which(None, "host_agent", "cpu_pct", "web-1") == []


async def test_a_lookup_that_fails_names_nothing(monkeypatch):
    monkeypatch.setattr(alerts, "_NAMED", {})

    async def broken(session, resource):
        raise RuntimeError("database away")

    alerts.names_behind("docker", "swarm_nodes_down", broken)
    assert await alerts.which(None, "docker", "swarm_nodes_down", "swarm") == []