🟢 adding test with np.nan

Passes right away

frictionless/formats/pandas/__spec__/test_parser.py

@@ -2,6 +2,7 @@
 from decimal import Decimal
 
 import isodate
+import numpy as np
 import pandas as pd
 import pytz
 from dateutil.tz import tzoffset, tzutc
@@ -45,6 +46,15 @@ def test_pandas_parser():
             assert resource.read_rows() == tc["expected_rows"], tc["name"]
 
 
+def test_pandas_parser_with_nan():
+    dataframe = pd.DataFrame(data={"x": [np.nan]})
+
+    with TableResource(data=dataframe) as resource:
+        test_name = 'np.nan converted to Decimal("NaN")'
+        row = resource.read_rows()[0]
+        assert row["x"].is_nan(), test_name
+
+
 def test_pandas_parser_from_dataframe_with_primary_key_having_datetime():
     df = pd.read_csv("data/vix.csv", sep=";", parse_dates=["Date"], index_col=["Date"])  # type: ignore
     with TableResource(data=df) as resource: