chore: import upstream snapshot with attribution

python/ray/dashboard/modules/metrics/tests/test_utils.py

@@ -0,0 +1,32 @@
+import json
+import sys
+
+import pytest
+
+from ray.dashboard.modules.metrics.metrics_head import (
+    DEFAULT_PROMETHEUS_HEADERS,
+    parse_prom_headers,
+)
+
+
+@pytest.mark.parametrize(
+    "headers, raises_error",
+    [
+        (DEFAULT_PROMETHEUS_HEADERS, False),
+        ('{"H1": "V1", "H2": "V2"}', False),
+        ('[["H1", "V1"], ["H2", "V2"], ["H2", "V3"]]', False),
+        ('{"H1": "V1", "H2": ["V1", "V2"]}', True),
+        ("not_json", True),
+    ],
+)
+def test_parse_prom_headers(headers, raises_error):
+    if raises_error:
+        with pytest.raises(ValueError):
+            parse_prom_headers(headers)
+    else:
+        result = parse_prom_headers(headers)
+        assert result == json.loads(headers)
+
+
+if __name__ == "__main__":
+    sys.exit(pytest.main(["-vv", __file__]))