add test for slot usage and fix active_slot assignment bug (#24)

Author: joshuadavidthomas

src/django_bird/templatetags/django_bird.py

@@ -81,6 +81,8 @@ def render_slots(self, context: Context) -> dict[str, str]:
             if isinstance(node, SlotNode):
                 active_slot = node.name
                 contents.setdefault(active_slot, [])
+            else:
+                active_slot = self.default_slot
 
             rendered_content = node.render(context)
             contents[active_slot].append(rendered_content)

tests/test_templatetags.py

@@ -127,6 +127,49 @@ def test_self_closing_tag(self, create_bird_template):
         rendered = template.render(context=Context({}))
         assert rendered == "<img src='image' />"
 
+    @pytest.mark.parametrize(
+        "component,template,context,expected",
+        [
+            (
+                "<button>{{ slot }}</button>",
+                "{% bird button %}Click me{% endbird %}",
+                {},
+                "<button>Click me</button>",
+            ),
+            (
+                "<button>{% bird:slot %}{% endbird:slot %}</button>",
+                "{% bird button %}Click me{% endbird %}",
+                {},
+                "<button>Click me</button>",
+            ),
+            (
+                "<button>{% bird:slot default %}{% endbird:slot %}</button>",
+                "{% bird button %}Click me{% endbird %}",
+                {},
+                "<button>Click me</button>",
+            ),
+            (
+                "<button><span>{% bird:slot leading-icon %}{% endbird:slot %}</span>{{ slot }}</button>",
+                "{% bird button %}{% bird:slot leading-icon %}Icon here{% endbird:slot %}Click me{% endbird %}",
+                {},
+                "<button><span>Icon here</span>Click me</button>",
+            ),
+        ],
+    )
+    def test_with_slots(
+        self,
+        component,
+        template,
+        context,
+        expected,
+        create_bird_template,
+        normalize_whitespace,
+    ):
+        create_bird_template("button", component)
+        t = Template(template)
+        rendered = t.render(context=Context(context))
+        assert normalize_whitespace(rendered) == expected
+
 
 @pytest.mark.xfail(reason="Feature not implemented yet")
 class TestBirdTemplateTagFutureFeatures: