feat(events): add cursor infinite event feed

backend/jobs/tests/test_api.py

@@ -0,0 +1,43 @@
+from urllib.parse import urlparse
+
+import pytest
+from rest_framework.test import APIClient
+
+from jobs.services import create_job
+
+
+@pytest.mark.django_db
+def test_global_events_use_cursor_pagination():
+    create_job(job_type="demo.success")
+    create_job(job_type="demo.fail")
+    create_job(job_type="demo.slow")
+
+    response = APIClient().get("/api/job-events/?limit=2")
+
+    assert response.status_code == 200
+    body = response.json()
+    assert body["next"] is not None
+    assert body["previous"] is None
+    assert len(body["results"]) == 2
+    assert body["results"][0]["id"] > body["results"][1]["id"]
+
+
+@pytest.mark.django_db
+def test_global_events_next_cursor_returns_older_events():
+    create_job(job_type="demo.success")
+    create_job(job_type="demo.fail")
+    create_job(job_type="demo.slow")
+    client = APIClient()
+    first_response = client.get("/api/job-events/?limit=2")
+    first_body = first_response.json()
+    parsed_next = urlparse(first_body["next"])
+    next_path = f"{parsed_next.path}?{parsed_next.query}"
+
+    next_response = client.get(next_path)
+
+    assert next_response.status_code == 200
+    body = next_response.json()
+    assert body["next"] is None
+    assert body["previous"] is not None
+    assert len(body["results"]) == 1
+    assert body["results"][0]["id"] < first_body["results"][1]["id"]