TST: Added list to invalid dtype

Changes made to:
 - test_empty_str_methods in test_strings.py
 - test_invalid_dtype_error in dtypes/test_common.py

Author: analyticalmonk

pandas/tests/dtypes/test_common.py

@@ -18,7 +18,7 @@ class TestPandasDtype(tm.TestCase):
     # Per issue GH15520
     def test_invalid_dtype_error(self):
         msg = 'not understood'
-        invalid_list = [pd.Timestamp, 'pd.Timestamp']
+        invalid_list = [pd.Timestamp, 'pd.Timestamp', list]
         for dtype in invalid_list:
             with tm.assertRaisesRegexp(TypeError, msg):
                 pandas_dtype(dtype)

pandas/tests/test_strings.py

@@ -1207,10 +1207,9 @@ def test_extractall_same_as_extract_subject_index(self):
         tm.assert_frame_equal(extract_one_noname, no_match_index)
 
     def test_empty_str_methods(self):
-        empty_str = empty = Series(dtype=str)
+        empty_str = empty = Series(dtype=object)
         empty_int = Series(dtype=int)
         empty_bool = Series(dtype=bool)
-        empty_list = Series(dtype=list)
         empty_bytes = Series(dtype=object)
 
         # GH7241
@@ -1241,19 +1240,11 @@ def test_empty_str_methods(self):
             DataFrame(columns=[0, 1], dtype=str),
             empty.str.extract('()()', expand=False))
         tm.assert_frame_equal(DataFrame(dtype=str), empty.str.get_dummies())
-        tm.assert_series_equal(empty_str, empty_list.str.join(''))
         tm.assert_series_equal(empty_int, empty.str.len())
-        tm.assert_series_equal(empty_list, empty_list.str.findall('a'))
         tm.assert_series_equal(empty_int, empty.str.find('a'))
         tm.assert_series_equal(empty_int, empty.str.rfind('a'))
         tm.assert_series_equal(empty_str, empty.str.pad(42))
         tm.assert_series_equal(empty_str, empty.str.center(42))
-        tm.assert_series_equal(empty_list, empty.str.split('a'))
-        tm.assert_series_equal(empty_list, empty.str.rsplit('a'))
-        tm.assert_series_equal(empty_list,
-                               empty.str.partition('a', expand=False))
-        tm.assert_series_equal(empty_list,
-                               empty.str.rpartition('a', expand=False))
         tm.assert_series_equal(empty_str, empty.str.slice(stop=1))
         tm.assert_series_equal(empty_str, empty.str.slice(step=1))
         tm.assert_series_equal(empty_str, empty.str.strip())