fix linked ifc selectability toggle

src/blenderbim/test/bim/feature/project.feature

@@ -329,6 +329,16 @@ Scenario: Toggle link visibility - wireframe mode
     Then "scene.BIMProjectProperties.links['{cwd}/test/files/basic.ifc'].is_wireframe" is "False"
     And the object "Chunk" should display as "TEXTURED"
 
+Scenario: Toggle link selectability
+    Given an empty IFC project
+    And I press "bim.link_ifc(filepath='{cwd}/test/files/basic.ifc')"
+    When I press "bim.toggle_link_selectability(link='{cwd}/test/files/basic.ifc')"
+    Then "scene.BIMProjectProperties.links['{cwd}/test/files/basic.ifc'].is_selectable" is "False"
+    And the collection "IfcProject/basic.ifc" is unselectable
+    When I press "bim.toggle_link_selectability(link='{cwd}/test/files/basic.ifc')"
+    Then "scene.BIMProjectProperties.links['{cwd}/test/files/basic.ifc'].is_selectable" is "True"
+    And the collection "IfcProject/basic.ifc" is selectable
+
 Scenario: Toggle link visibility - visible mode
     Given an empty IFC project
     And I press "bim.link_ifc(filepath='{cwd}/test/files/basic.ifc')"

src/blenderbim/test/bim/test_feature.py

@@ -397,6 +397,18 @@ def the_collection_name_exists(name) -> bpy.types.Collection:
     return obj
 
 
+@then(parsers.parse('the collection "{name}" is selectable'))
+def the_collection_name_is_selectable(name: str) -> None:
+    col = the_collection_name_exists(name)
+    assert col.hide_select == False
+
+
+@then(parsers.parse('the collection "{name}" is unselectable'))
+def the_collection_name_is_unselectable(name: str) -> None:
+    col = the_collection_name_exists(name)
+    assert col.hide_select == True
+
+
 @then(parsers.parse('the collection "{name}" exists in viewlayer'))
 def the_collection_exists_in_viewlayer(name: str) -> bpy.types.LayerCollection:
     col = the_collection_name_exists(name)