Fix bug where deleting the drawing object could lead to orphaned relationships

src/blenderbim/test/bim/feature/drawing.feature

@@ -47,3 +47,29 @@ Scenario: Create drawing after deleting a duplicated object
     And I press "object.delete(use_global=False)"
     When I press "bim.create_drawing"
     Then nothing happens
+
+Scenario: Remove drawing
+    Given an empty IFC project
+    And I add a cube
+    And the object "Cube" is selected
+    And I set "scene.BIMRootProperties.ifc_class" to "IfcWall"
+    And I press "bim.assign_class"
+    And the variable "wall1" is "IfcStore.get_file().by_type('IfcWall')[-1].id()"
+    And I press "bim.add_drawing"
+    And the variable "drawing" is "IfcStore.get_file().by_type('IfcAnnotation')[0].id()"
+    And the collection "IfcGroup/PLAN_VIEW" exists
+    When I press "bim.remove_drawing(drawing={drawing})"
+    Then the collection "IfcGroup/PLAN_VIEW" does not exist
+
+Scenario: Remove drawing - via object deletion
+    Given an empty IFC project
+    And I add a cube
+    And the object "Cube" is selected
+    And I set "scene.BIMRootProperties.ifc_class" to "IfcWall"
+    And I press "bim.assign_class"
+    And the variable "wall1" is "IfcStore.get_file().by_type('IfcWall')[-1].id()"
+    And I press "bim.add_drawing"
+    And the variable "drawing" is "IfcStore.get_file().by_type('IfcAnnotation')[0].id()"
+    And the object "IfcAnnotation/PLAN_VIEW" is selected
+    When I press "bim.override_object_delete"
+    Then the collection "IfcGroup/PLAN_VIEW" does not exist

src/blenderbim/test/bim/feature/geometry.feature

@@ -262,7 +262,7 @@ Scenario: Override delete - without active IFC data
     Given an empty Blender session
     And I add a cube
     And the object "Cube" is selected
-    When I press "object.delete"
+    When I press "bim.override_object_delete"
     Then the object "Cube" does not exist
 
 Scenario: Override delete - with active IFC data
@@ -272,7 +272,7 @@ Scenario: Override delete - with active IFC data
     And I set "scene.BIMRootProperties.ifc_class" to "IfcWall"
     And I press "bim.assign_class"
     And the object "IfcWall/Cube" is selected
-    When I press "object.delete"
+    When I press "bim.override_object_delete"
     Then the object "IfcWall/Cube" does not exist
 
 Scenario: Override outliner delete

src/blenderbim/test/bim/test_feature.py

@@ -301,6 +301,16 @@ def the_object_name_exists(name) -> bpy.types.Object:
     return obj
 
 
+@given(parsers.parse('the collection "{name}" exists'))
+@when(parsers.parse('the collection "{name}" exists'))
+@then(parsers.parse('the collection "{name}" exists'))
+def the_collection_name_exists(name) -> bpy.types.Collection:
+    obj = bpy.data.collections.get(name)
+    if not obj:
+        assert False, f'The collection "{name}" does not exist'
+    return obj
+
+
 @then(parsers.parse('the object "{name1}" and "{name2}" are different elements'))
 def the_object_name1_and_name2_are_different_elements(name1, name2):
     ifc = an_ifc_file_exists()
@@ -585,7 +595,13 @@ def the_collection_name1_is_in_the_collection_name2(name1, name2):
 @then(parsers.parse('the object "{name}" does not exist'))
 def the_object_name_does_not_exist(name):
     obj = bpy.data.objects.get(name)
-    assert obj is None or len(obj.users_collection) == 0, "Object exists"
+    assert obj is None or len(obj.users_collection) == 0, f"Object {name} exists"
+
+
+@then(parsers.parse('the collection "{name}" does not exist'))
+def the_collection_name_does_not_exist(name):
+    obj = bpy.data.collections.get(name)
+    assert obj is None, f"Collection {name} exists"
 
 
 @then(parsers.parse('objects starting with "{name}" do not exist'))