Contain all registry logic in helper methods.

django_components/component_registry.py

@@ -15,7 +15,18 @@ class ComponentRegistry(object):
         self._registry[name] = component
 
     def unregister(self, name):
+        self.get(name)
+
+        del self._registry[name]
+
+    def get(self, name):
         if name not in self._registry:
             raise NotRegistered('The component "%s" is not registered' % name)
 
-        del self._registry[name]
+        return self._registry[name]
+
+    def all(self):
+        return self._registry
+
+    def clear(self):
+        self._registry = {}

django_components/templatetags/component_tags.py

@@ -7,7 +7,7 @@ register = template.Library()
 
 @register.simple_tag(name="component_dependencies")
 def component_dependencies_tag():
-    unique_component_classes = set(registry._registry.values())
+    unique_component_classes = set(registry.all().values())
 
     out = []
     for component_class in unique_component_classes:
@@ -18,6 +18,6 @@ def component_dependencies_tag():
 
 @register.simple_tag(name="component")
 def component_tag(name, *args, **kwargs):
-    component_class = registry._registry[name]
+    component_class = registry.get(name)
     component = component_class()
     return component.render(*args, **kwargs)