Add tests (pandas-dev#25435)

Author: Albert Villanova del Moral

pandas/tests/io/json/test_pandas.py

@@ -1202,10 +1202,12 @@ def test_data_frame_size_after_to_json(self):
 
         assert size_before == size_after
 
-    @pytest.mark.parametrize('index', [None, [1., 2.], ['1', '2'],
-                                       ['1.', '2.']])
-    def test_from_json_to_json_table_index(self, index):
-        expected = DataFrame({'a': [1, 2]}, index=index)
+    @pytest.mark.parametrize('index', [None, [1, 2], [1., 2.], ['a', 'b'],
+                                       ['1', '2'], ['1.', '2.']])
+    @pytest.mark.parametrize('columns', [['a', 'b'], ['1', '2'], ['1.', '2.']])
+    def test_from_json_to_json_table_index_and_columns(self, index, columns):
+        # GH25433 GH25435
+        expected = DataFrame([[1, 2], [3, 4]], index=index, columns=columns)
         dfjson = expected.to_json(orient='table')
         result = pd.read_json(dfjson, orient='table')
         assert_frame_equal(result, expected)