Add tests for audits and flavor utilities, update .gitignore, and enhance CPU data handling

dashboard/tests/test_audits.py

@@ -0,0 +1,43 @@
+"""Tests for dashboard.openstack_utils.audits."""
+from django.test import TestCase
+
+from dashboard.openstack_utils.audits import convert_cpu_data
+
+
+class ConvertCpuDataTest(TestCase):
+    """Tests for convert_cpu_data."""
+
+    def test_aggregates_cpu_usage_per_host(self):
+        data = [
+            {
+                "metric": {"host": "compute-0", "instanceName": "inst1"},
+                "values": [[1000, "10.0"], [1001, "20.0"]],
+            },
+            {
+                "metric": {"host": "compute-0", "instanceName": "inst2"},
+                "values": [[1000, "5.0"]],
+            },
+            {
+                "metric": {"host": "compute-1", "instanceName": "inst3"},
+                "values": [[1000, "30.0"]],
+            },
+        ]
+        result = convert_cpu_data(data)
+        self.assertIn("host", result.columns)
+        self.assertIn("cpu_usage", result.columns)
+        hosts = result["host"].tolist()
+        self.assertEqual(len(hosts), 2)
+        self.assertIn("compute-0", hosts)
+        self.assertIn("compute-1", hosts)
+        # compute-0: (10+20)/2 for ts 1000 and 5 for ts 1000 -> groupby host,timestamp sum -> then groupby host mean
+        # For compute-0: two timestamps 1000 (10+5=15) and 1001 (20). Mean over timestamps = (15+20)/2 = 17.5
+        # For compute-1: one value 30
+        by_host = result.set_index("host")["cpu_usage"]
+        self.assertAlmostEqual(by_host["compute-0"], 17.5)
+        self.assertAlmostEqual(by_host["compute-1"], 30.0)
+
+    def test_empty_data_returns_empty_dataframe_with_columns(self):
+        result = convert_cpu_data([])
+        self.assertIn("host", result.columns)
+        self.assertIn("cpu_usage", result.columns)
+        self.assertEqual(len(result), 0)