Implement lightweight Gherkin testing for full stack tests

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

@@ -16,14 +16,17 @@
 # You should have received a copy of the GNU General Public License
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
 
-import bpy
-import pytest
 import test.bim.bootstrap
-from blenderbim.bim.ifc import IfcStore
 
 
 class TestCreateProject(test.bim.bootstrap.NewFile):
+    @test.bim.bootstrap.scenario
     def test_creating_a_project(self):
-        assert IfcStore.get_file() is None
-        bpy.ops.bim.create_project()
-        assert IfcStore.get_file()
+        return """
+        When I press "bim.create_project"
+        Then an IFC file exists
+        And the object named "IfcProject/My Project" is an "IfcProject"
+        And the object named "IfcSite/My Site" is an "IfcSite"
+        And the object named "IfcBuilding/My Building" is an "IfcBuilding"
+        And the object named "IfcBuildingStorey/My Storey" is an "IfcBuildingStorey"
+        """

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

@@ -0,0 +1,32 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import test.bim.bootstrap
+
+
+class TestCreateProject(test.bim.bootstrap.NewFile):
+    @test.bim.bootstrap.scenario
+    def test_assigning_a_class_to_a_cube(self):
+        return """
+        Given an empty IFC project
+        When I add a cube
+        And the object named "Cube" is selected
+        And I select "IfcWall" in "scene.BIMRootProperties.ifc_class"
+        And I press "bim.assign_class"
+        And the object named "IfcWall/Cube" is an "IfcWall"
+        """