🐛 Fix flaky test_disk_usage (#5364)

Co-authored-by: Andrei Neagu <[email protected]>

packages/models-library/tests/test_api_schemas_dynamic_sidecar_telemetry.py

@@ -1,10 +1,29 @@
 import psutil
+import pytest
 from models_library.api_schemas_dynamic_sidecar.telemetry import DiskUsage
+from psutil._common import sdiskusage
 
 
-def test_disk_usage():
-    ps_util_disk_usage = psutil.disk_usage("/")
+def _assert_same_value(ps_util_disk_usage: sdiskusage) -> None:
     disk_usage = DiskUsage.from_ps_util_disk_usage(ps_util_disk_usage)
     assert disk_usage.used == ps_util_disk_usage.used
     assert disk_usage.free == ps_util_disk_usage.free
-    assert round(disk_usage.used_percent, 1) == round(ps_util_disk_usage.percent, 1)
+    assert disk_usage.used_percent == pytest.approx(ps_util_disk_usage.percent, abs=1e3)
+
+
+@pytest.mark.parametrize(
+    "ps_util_disk_usage",
+    [
+        sdiskusage(total=77851254784, used=58336940032, free=19497537536, percent=74.9),
+        sdiskusage(total=77851254784, used=58573619200, free=19260858368, percent=75.3),
+        sdiskusage(total=77851254784, used=58573529088, free=19260948480, percent=75.3),
+        sdiskusage(total=77851254784, used=58573664256, free=19260813312, percent=75.3),
+    ],
+)
+def test_disk_usage_regression_cases(ps_util_disk_usage: sdiskusage):
+    _assert_same_value(ps_util_disk_usage)
+
+
+def test_disk_usage():
+    ps_util_disk_usage = psutil.disk_usage("/")
+    _assert_same_value(ps_util_disk_usage)