solved duplicate points error

tests/test_rrd.py

@@ -1,3 +1,4 @@
+from netatmo_service.data import Sample
 from netatmo_service.rrd import RRDStore
 
 
@@ -5,3 +6,16 @@ def test_rrd_files_have_netatmo_prefix(tmp_path):
     store = RRDStore(tmp_path)
     assert store.path("outdoor") == tmp_path / "netatmo_outdoor.rrd"
     assert store.path("wind") == tmp_path / "netatmo_wind.rrd"
+
+
+def test_rrd_is_updated_only_once_per_collection_interval(tmp_path):
+    store = RRDStore(tmp_path)
+    store.ensure_all()
+    now = int(__import__("time").time())
+    timestamp = ((now // 600) - 1) * 600 + 100
+    first = Sample(timestamp, {"temperature": 20, "co2": 500, "humidity": 50})
+    same_interval = Sample(timestamp + 1, {"temperature": 21, "co2": 510, "humidity": 51})
+
+    assert store.update("study", first) is True
+    assert store.update("study", first) is False
+    assert store.update("study", same_interval) is False