Add backend monitor and notification tests

backend/tests/test_monitors.py

@@ -0,0 +1,74 @@
+from fastapi.testclient import TestClient
+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from app.models import AlertRule, Asset, Monitor
+
+
+def test_create_website_monitor_creates_asset_and_alert_rule(client: TestClient, db_session: Session) -> None:
+    response = client.post(
+        "/monitors/website",
+        json={
+            "name": "Example Site",
+            "url": "https://example.com",
+            "expected_status": 200,
+            "expected_text": "Example Domain",
+            "unexpected_text": None,
+            "timeout_seconds": 7,
+            "check_tls_expiry": True,
+            "tls_warning_days": 45,
+            "interval_seconds": 60,
+            "create_asset": True,
+            "alert_enabled": True,
+            "alert_severity": "critical",
+            "failure_threshold": 2,
+        },
+    )
+
+    assert response.status_code == 200
+    body = response.json()
+    assert body["name"] == "Example Site"
+    assert body["monitor_type"] == "http"
+    assert body["target"] == "https://example.com"
+    assert body["config"]["check_tls_expiry"] is True
+    assert body["config"]["tls_warning_days"] == 45
+
+    monitor = db_session.get(Monitor, body["id"])
+    assert monitor is not None
+    assert monitor.asset_id is not None
+
+    asset = db_session.get(Asset, monitor.asset_id)
+    assert asset is not None
+    assert asset.name == "Example Site"
+    assert asset.asset_type == "website"
+    assert asset.address == "https://example.com"
+
+    rule = db_session.scalar(select(AlertRule).where(AlertRule.monitor_id == monitor.id))
+    assert rule is not None
+    assert rule.name == "Example Site website failure"
+    assert rule.severity == "critical"
+    assert rule.condition == {"type": "status_not_up"}
+    assert rule.failure_threshold == 2
+    assert rule.cooldown_seconds == 300
+    assert rule.is_enabled is True
+
+
+def test_create_website_monitor_can_skip_default_alert_rule(client: TestClient, db_session: Session) -> None:
+    response = client.post(
+        "/monitors/website",
+        json={
+            "name": "Status Only",
+            "url": "https://status.example.com",
+            "interval_seconds": 120,
+            "create_asset": False,
+            "alert_enabled": False,
+        },
+    )
+
+    assert response.status_code == 200
+    body = response.json()
+
+    monitor = db_session.get(Monitor, body["id"])
+    assert monitor is not None
+    assert monitor.asset_id is None
+    assert db_session.scalars(select(AlertRule).where(AlertRule.monitor_id == monitor.id)).all() == []