Improve __str__ of LineBotApiError (#112)

* Improve __str__ of LineBotApiError

* Add http status code into __str__

Author: be-hase

linebot/exceptions.py

@@ -73,3 +73,12 @@ def __init__(self, status_code, error=None):
 
         self.status_code = status_code
         self.error = error
+
+    def __str__(self):
+        """str.
+
+        :rtype: str
+        :return:
+        """
+        return '{0}: status_code={1}, error_response={2}'.format(
+            self.__class__.__name__, self.status_code, self.error)

tests/test_exceptions.py

@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+
+#  Licensed under the Apache License, Version 2.0 (the "License"); you may
+#  not use this file except in compliance with the License. You may obtain
+#  a copy of the License at
+#
+#       https://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#  License for the specific language governing permissions and limitations
+#  under the License.
+
+from __future__ import unicode_literals, absolute_import
+
+import unittest
+
+from linebot.exceptions import LineBotApiError
+from linebot.models import Error, ErrorDetail
+
+
+class TestUtils(unittest.TestCase):
+    def test_str(self):
+        line_bot_api_error = LineBotApiError(
+            400,
+            error=Error(message='The request body has 1 error(s)',
+                        details=[ErrorDetail(message='May not be empty',
+                                             property='messages[0].text')]))
+        self.assertEqual(line_bot_api_error.__str__(),
+                         'LineBotApiError: status_code=400, error_response={"details": '
+                         '[{"message": "May not be empty", "property": "messages[0].text"}], '
+                         '"message": "The request body has 1 error(s)"}')
+
+
+if __name__ == '__main__':
+    unittest.main()