old_contents: import overpy
  
  
  class TestExceptions:
      def test_element_data_wrong_type(self):
          e = overpy.exception.ElementDataWrongType("from1")
          assert e.type_expected == "from1"
          assert e.type_provided == None
          assert isinstance(str(e), str)
  
          e = overpy.exception.ElementDataWrongType("from2", "to2")
          assert e.type_expected == "from2"
          assert e.type_provided == "to2"
          assert isinstance(str(e), str)
  
      def test_overpass_bad_request(self):
          e = overpy.exception.OverpassBadRequest("query")
          assert e.query == "query"
          assert isinstance(e.msgs, list)
          assert len(e.msgs) == 0
          assert str(e) == ""
  
          e = overpy.exception.OverpassBadRequest("test\nquery\n123", ["abc", 1])
          assert e.query == "test\nquery\n123"
          assert isinstance(e.msgs, list)
          assert len(e.msgs) == 2
          assert str(e) == "abc\n1"
  
      def test_overpass_unknown_content_type(self):
          e = overpy.exception.OverpassUnknownContentType(None)
          assert e.content_type == None
          assert str(e).startswith("No content")
  
          e = overpy.exception.OverpassUnknownContentType("content")
          assert e.content_type == "content"
          assert str(e).startswith("Unknown content")
          assert str(e).endswith("content")
  
      def test_overpass_unknown_http_status_code(self):
          e = overpy.exception.OverpassUnknownHTTPStatusCode(123)
          assert e.code == 123
          assert str(e).endswith("123")
  
      def test_overpass_error(self):
          exceptions = [
              overpy.exception.OverpassError,
              overpy.exception.OverpassRuntimeError,
              overpy.exception.OverpassRuntimeRemark,
              overpy.exception.OverpassUnknownError
          ]
          for cls in exceptions:
              e = cls(msg="Test message")
              assert e.msg == "Test message"
              assert str(e) == "Test message"
  
          for cls in exceptions:
              e = cls()
              assert e.msg is None
              assert str(e) == "No error message provided"
  
          for cls in exceptions:
              e = cls(msg=123)
              assert e.msg == 123
              assert str(e) == "123"
  
new_contents: import overpy
  
  
  class TestExceptions:
      def test_element_data_wrong_type(self):
          e = overpy.exception.ElementDataWrongType("from1")
          assert e.type_expected == "from1"
          assert e.type_provided is None
          assert isinstance(str(e), str)
  
          e = overpy.exception.ElementDataWrongType("from2", "to2")
          assert e.type_expected == "from2"
          assert e.type_provided == "to2"
          assert isinstance(str(e), str)
  
      def test_overpass_bad_request(self):
          e = overpy.exception.OverpassBadRequest("query")
          assert e.query == "query"
          assert isinstance(e.msgs, list)
          assert len(e.msgs) == 0
          assert str(e) == ""
  
          e = overpy.exception.OverpassBadRequest("test\nquery\n123", ["abc", 1])
          assert e.query == "test\nquery\n123"
          assert isinstance(e.msgs, list)
          assert len(e.msgs) == 2
          assert str(e) == "abc\n1"
  
      def test_overpass_unknown_content_type(self):
          e = overpy.exception.OverpassUnknownContentType(None)
          assert e.content_type is None
          assert str(e).startswith("No content")
  
          e = overpy.exception.OverpassUnknownContentType("content")
          assert e.content_type == "content"
          assert str(e).startswith("Unknown content")
          assert str(e).endswith("content")
  
      def test_overpass_unknown_http_status_code(self):
          e = overpy.exception.OverpassUnknownHTTPStatusCode(123)
          assert e.code == 123
          assert str(e).endswith("123")
  
      def test_overpass_error(self):
          exceptions = [
              overpy.exception.OverpassError,
              overpy.exception.OverpassRuntimeError,
              overpy.exception.OverpassRuntimeRemark,
              overpy.exception.OverpassUnknownError
          ]
          for cls in exceptions:
              e = cls(msg="Test message")
              assert e.msg == "Test message"
              assert str(e) == "Test message"
  
          for cls in exceptions:
              e = cls()
              assert e.msg is None
              assert str(e) == "No error message provided"
  
          for cls in exceptions:
              e = cls(msg=123)
              assert e.msg == 123
              assert str(e) == "123"
  
subject: Fix None comparison