[crio] strengthen tests to lift mutation score (DataDog#24346)

Author: philjlee

crio/tests/test_unit.py

@@ -0,0 +1,22 @@
+# (C) Datadog, Inc. 2026-present
+# All rights reserved
+# Licensed under a 3-clause BSD style license (see LICENSE)
+import pytest
+
+from datadog_checks.crio import CrioCheck
+
+pytestmark = pytest.mark.unit
+
+CHECK_NAME = 'crio'
+
+
+def test_default_metric_limit_is_zero():
+    # Kills the core/NumberReplacer mutant at crio.py:12 (DEFAULT_METRIC_LIMIT 0 -> -1).
+    assert CrioCheck.DEFAULT_METRIC_LIMIT == 0
+
+
+def test_send_histograms_buckets_defaults_to_true(instance):
+    # Kills the core/ReplaceTrueWithFalse mutant at crio.py:30 (send_histograms_buckets True -> False).
+    check = CrioCheck(CHECK_NAME, {}, [instance])
+    scraper_config = check.get_scraper_config(instance)
+    assert scraper_config['send_histograms_buckets'] is True