TST: Adding DataFrame.to_dict(orient=records) numeric consistency test [Ref pandas-dev#22620]

Author: sofiane87

pandas/tests/frame/test_convert_to.py

@@ -612,3 +612,11 @@ def test_to_dict_wide(self):
         result = df.to_dict("records")[0]
         expected = {"A_{:d}".format(i): i for i in range(256)}
         assert result == expected
+
+    def test_to_dict_orient_dtype(self):
+        # https://github.com/pandas-dev/pandas/issues/22620
+        input_data = {'a': [1, 2, 3], 'b': [1.0, 2.0, 3.0], 'c': ['X', 'Y', 'Z']}
+        df = DataFrame(input_data)
+        result = {col: type(value) for col, value in df.to_dict('records')[0].items()}
+        expected = {col: type(data[0]) for col, data in input_data.items()}
+        assert result == expected