8th day of python challenges 111-117

venv/lib/python3.6/site-packages/pandas/tests/extension/base/io.py

@@ -0,0 +1,20 @@
+from io import StringIO
+
+import numpy as np
+import pytest
+
+import pandas as pd
+
+from .base import BaseExtensionTests
+
+
+class BaseParsingTests(BaseExtensionTests):
+    @pytest.mark.parametrize("engine", ["c", "python"])
+    def test_EA_types(self, engine, data):
+        df = pd.DataFrame({"with_dtype": pd.Series(data, dtype=str(data.dtype))})
+        csv_output = df.to_csv(index=False, na_rep=np.nan)
+        result = pd.read_csv(
+            StringIO(csv_output), dtype={"with_dtype": str(data.dtype)}, engine=engine
+        )
+        expected = df
+        self.assert_frame_equal(result, expected)