test: Add blackbox test

src/capellambse_context_diagrams/collectors/default.py

@@ -61,6 +61,8 @@ def _collect_extended_context(
         target: m.ModelElement,
     ) -> cabc.Iterator[m.ModelElement]:
         yield from _collect(target)
+        if not diagram._display_actor_relation:
+            return
         oc_copy = outside_components.copy()
         for cmp in oc_copy.values():
             yield from _collect(
@@ -73,10 +75,7 @@ def _collect_extended_context(
                 ),
             )
 
-    if diagram._display_actor_relationship:
-        diagram._collect = _collect(diagram.target)
-    else:
-        diagram._collect = _collect_extended_context(diagram.target)
+    diagram._collect = _collect_extended_context(diagram.target)
     processor = custom.CustomCollector(diagram, params=params)
     processor()
     return processor.data

src/capellambse_context_diagrams/context.py

@@ -288,7 +288,7 @@ class CustomDiagram(m.AbstractDiagram):
     * collect - A list of collected elements.
     * unify_edge_direction - Unify the direction of the edges.
     * balckbox - Display the object of interest as a black box.
-    * display_actor_relationship: Show the connections between the context actors.
+    * display_actor_relation: Show the connections between the context actors.
     """
 
     _display_symbols_as_boxes: bool
@@ -302,7 +302,7 @@ class CustomDiagram(m.AbstractDiagram):
     _collect: cabc.Iterator[m.ModelElement]
     _unify_edge_direction: str
     _blackbox: bool
-    _display_actor_relationship: bool
+    _display_actor_relation: bool
 
     def __init__(
         self,
@@ -333,7 +333,7 @@ def __init__(
             "collect": [],
             "unify_edge_direction": "NONE",
             "blackbox": False,
-            "display_actor_relationship": False,
+            "display_actor_relation": False,
         } | default_render_parameters
 
         if standard_filter := STANDARD_FILTERS.get(class_):
@@ -464,7 +464,6 @@ def __init__(
         default_render_parameters = {
             "slim_center_box": True,
             "unify_edge_direction": "SMART",
-            "blackbox": True,
         } | default_render_parameters
 
         super().__init__(