Merge pull request #74 from sakarpanta/master

Resolves issues with void tags accepting child elements #73

tempy/elements.py

@@ -292,6 +292,12 @@ class VoidTag(Tag):
     _void = True
     _template = '<{tag}{attrs}/>'
 
+    def _insert(self, dom_group, idx=None, prepend=False, name=None):
+        if dom_group is not None:
+            raise TagError(self, 'Adding elements to a Void Tag is prohibited.')
+        else:
+            super()._insert(self, dom_group, idx, prepend, name)
+
 
 class Css(Tag):
     """Special class for the style tag.

tests/test_Tag.py

@@ -4,7 +4,7 @@
 """
 import unittest
 
-from tempy.tags import Div, P
+from tempy.tags import Div, P, Br
 from tempy.elements import Tag, Content, TagAttrs
 from tempy.exceptions import TagError, WrongContentError, WrongArgsError
 
@@ -82,6 +82,14 @@ def test_parent(self):
         p = P().append_to(d)
         self.assertEqual(p.parent, d)
 
+    def test_void_tag_insertion(self):
+        with self.assertRaises(TagError):
+            d = Br()(Div(id='test_void_tag_insertion'))
+
+        br = Br()
+        with self.assertRaises(TagError):
+            p = Div().append_to(br)
+
     def test_index(self):
         father = Div()(Div(), Div())
         d = Div().append_to(father)