You can now unload a partially loaded project

src/blenderbim/test/bim/bootstrap.py

@@ -129,6 +129,12 @@ def an_ifc_file_exists():
     return ifc
 
 
+def an_ifc_file_does_not_exist():
+    ifc = IfcStore.get_file()
+    if ifc:
+        assert False, "An IFC is available"
+
+
 def the_object_name_does_not_exist(name):
     assert bpy.data.objects.get(name) is None, "Object exists"
 
@@ -255,6 +261,7 @@ definitions = {
     'the object "(.*)" is in the collection "(.*)"': the_object_name_is_in_the_collection_collection,
     'the collection "(.*)" is in the collection "(.*)"': the_collection_name1_is_in_the_collection_name2,
     "an IFC file exists": an_ifc_file_exists,
+    "an IFC file does not exist": an_ifc_file_does_not_exist,
     'the object "(.*)" has a "(.*)" representation of "(.*)"': the_object_name_has_a_type_representation_of_context,
     'the object "(.*)" is placed in the collection "(.*)"': the_object_name_is_placed_in_the_collection_collection,
     'the object "(.*)" is contained in "(.*)"': the_object_name_is_contained_in_container_name,

src/blenderbim/test/bim/module/project/test_operator.py

@@ -94,3 +94,13 @@ class TestLoadProjectElements(test.bim.bootstrap.NewFile):
         And the object "IfcBuildingStorey/Level 1" does not exist
         And the object "IfcWall/Wall" does not exist
         """
+
+class TestUnloadProject(test.bim.bootstrap.NewFile):
+    @test.bim.bootstrap.scenario
+    def test_unloading_a_project(self):
+        return """
+        When I press "bim.load_project(filepath='{cwd}/test/files/basic.ifc')"
+        And I press "bim.unload_project"
+        Then an IFC file does not exist
+        And "scene.BIMProjectProperties.is_loading" is "False"
+        """