Change error message if section name is equal to form name

pyxform/survey.py

@@ -183,8 +183,16 @@ def validate(self):
         self._validate_uniqueness_of_section_names()
 
     def _validate_uniqueness_of_section_names(self):
+        root_node_name = self.name
         section_names = []
         for element in self.iter_descendants():
+            if not isinstance(element, Survey) and element.name == root_node_name:
+                raise PyXFormError(
+                    'The name "%s" is the same as the form name. '
+                    "Use a different section name "
+                    '(or change the form name in the "name" column of the settings sheet).'
+                    % element.name
+                )
             if isinstance(element, Section):
                 if element.name in section_names:
                     raise PyXFormError(

pyxform/tests/builder_tests.py

@@ -40,7 +40,7 @@ def test_uniqueness_of_section_names(self):
 
     def setUp(self):
         self.this_directory = os.path.dirname(__file__)
-        survey_out = Survey(name="age", sms_keyword="age", type="survey")
+        survey_out = Survey(name="survey_age", sms_keyword="age", type="survey")
         question = InputQuestion(name="age")
         question.type = "integer"
         question.label = "How old are you?"

pyxform/tests_v1/test_fields.py

@@ -162,3 +162,20 @@ def test_choice_list_without_duplicates_is_successful(self):
     </select1>
 """
         self.assertPyxformXform(md=md, xml__contains=[expected])
+
+    def test_duplicate_form_name_in_section_name(self):
+        """
+        Ensure that the section name cannot be the same as form name
+        """
+        self.assertPyxformXform(
+            name="foo",
+            md="""
+            | Survey   |             |         |               |
+            |          | Type        | Name    | Label         |
+            |          | begin group | foo     | A group       |
+            |          | text        | a       | Enter text    |
+            |          | end group   |         |               |
+            """,
+            errored=True,
+            error__contains=['The name "foo" is the same as the form name'],
+        )