add test cases with dtype=None

Author: vladserkoff

pandas/tests/arrays/test_integer.py

@@ -618,7 +618,9 @@ def test_to_integer_array_float():
     'bool_values, int_values, result_dtype',
     [([False, True], [0, 1], Int64Dtype()),
      ([False, True], [0, 1], 'Int64'),
-     ([False, True, np.nan], [0, 1, np.nan], Int64Dtype())])
+     ([False, True, np.nan], [0, 1, np.nan], Int64Dtype()),
+     ([False, True], [0, 1], None),
+     ([False, True, np.nan], [0, 1, np.nan], None)])
 def test_to_integer_array_bool(bool_values, int_values, result_dtype):
     result = integer_array(bool_values, dtype=result_dtype)
     assert result.dtype == result_dtype