add ability to create self-closing bird tags (#4)

Author: joshuadavidthomas

src/django_bird/templatetags/django_bird.py

@@ -31,14 +31,17 @@ def do_bird(parser: Parser, token: Token) -> BirdNode:
     name = bits[1].strip("'\"")
     attrs = bits[2:]
 
-    nodelist = parser.parse(("endbird",))
-    parser.delete_first_token()
+    if len(attrs) > 0 and attrs[-1] == "/":
+        nodelist = None
+    else:
+        nodelist = parser.parse(("endbird",))
+        parser.delete_first_token()
 
     return BirdNode(name, attrs, nodelist)
 
 
 class BirdNode(template.Node):
-    def __init__(self, name: str, attrs: list[str], nodelist: NodeList) -> None:
+    def __init__(self, name: str, attrs: list[str], nodelist: NodeList | None) -> None:
         self.name = name
         self.attrs = attrs
         self.nodelist = nodelist
@@ -61,6 +64,9 @@ def render(self, context: Context) -> SafeString:
         return render_to_string(f"bird/{self.name}.html", component_context)
 
     def render_slots(self, context: Context) -> dict[str, str]:
+        if self.nodelist is None:
+            return {}
+
         contents: dict[str, list[str]] = {self.default_slot: []}
         active_slot = self.default_slot
 

tests/test_templatetags.py

@@ -118,6 +118,12 @@ def test_rendered_attrs(
         rendered = t.render(context=Context(context))
         assert normalize_whitespace(rendered) == expected
 
+    def test_self_closing_tag(self, create_bird_template):
+        create_bird_template(name="image", content="<img src='image' />")
+        template = Template("{% bird image src='image' / %}")
+        rendered = template.render(context=Context({}))
+        assert rendered == "<img src='image' />"
+
 
 @pytest.mark.xfail(reason="Feature not implemented yet")
 class TestBirdTemplateTagFutureFeatures: