New feature to unlink Blender materials and IFC materials

src/blenderbim/test/bim/feature/material.feature

@@ -0,0 +1,11 @@
+@material
+Feature: Material
+
+Scenario: Unlink object
+    Given an empty IFC project
+    And I add a cube
+    And the object "Cube" is selected
+    And I add a material
+    And I press "bim.add_material"
+    When I press "bim.unlink_material"
+    Then the material "Material" is not an IFC material

src/blenderbim/test/bim/feature/style.feature

@@ -30,7 +30,7 @@ Scenario: Unlink style
     And I add a material
     And I press "bim.add_style"
     When I press "bim.unlink_style"
-    Then nothing happens
+    Then the material "Material" is not an IFC style
 
 Scenario: Enable editing style
     Given an empty IFC project

src/blenderbim/test/bim/test_feature.py

@@ -159,6 +159,14 @@ def the_object_name_exists(name) -> bpy.types.Object:
     return obj
 
 
+@then(parsers.parse('the material "{name}" exists'))
+def the_material_name_exists(name) -> bpy.types.Material:
+    obj = bpy.data.materials.get(name)
+    if not obj:
+        assert False, f'The material "{name}" does not exist'
+    return obj
+
+
 @then("an IFC file does not exist")
 def an_ifc_file_does_not_exist():
     ifc = IfcStore.get_file()
@@ -249,6 +257,18 @@ def the_object_name_is_not_an_ifc_element(name):
     assert id == 0, f"The ID is {id}"
 
 
+@then(parsers.parse('the material "{name}" is not an IFC material'))
+def the_material_name_is_not_an_ifc_material(name):
+    id = the_material_name_exists(name).BIMObjectProperties.ifc_definition_id
+    assert id == 0, f"The ID is {id}"
+
+
+@then(parsers.parse('the material "{name}" is not an IFC style'))
+def the_material_name_is_not_an_ifc_material(name):
+    id = the_material_name_exists(name).BIMMaterialProperties.ifc_style_id
+    assert id == 0, f"The ID is {id}"
+
+
 @then(parsers.parse('the object "{name}" has "{number}" vertices'))
 def the_object_name_has_number_vertices(name, number):
     total = len(the_object_name_exists(name).data.vertices)

src/blenderbim/test/core/bootstrap.py

@@ -49,6 +49,13 @@ def context():
     prophet.verify()
 
 
+@pytest.fixture
+def material():
+    prophet = Prophecy(blenderbim.core.tool.Material)
+    yield prophet
+    prophet.verify()
+
+
 @pytest.fixture
 def owner():
     prophet = Prophecy(blenderbim.core.tool.Owner)

src/blenderbim/test/core/test_material.py

@@ -0,0 +1,26 @@
+# 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 blenderbim.core.material as subject
+from test.core.bootstrap import ifc, material
+
+
+class TestUnlinkMaterial:
+    def test_run(self, material):
+        material.unlink("obj").should_be_called()
+        subject.unlink_material(material, obj="obj")

src/blenderbim/test/tool/test_container.py

@@ -127,7 +127,7 @@ class TestImportContainers(NewFile):
         bpy.ops.bim.copy_class(obj=tool.Ifc.get_object(storey1).name)
         storey2 = tool.Ifc.get().by_type("IfcBuildingStorey")[1]
         storey2.Name = "Lower"
-        storey2.ObjectPlacement.RelativePlacement.Location.Coordinates = (0., 0., -100.)
+        storey2.ObjectPlacement.RelativePlacement.Location.Coordinates = (0.0, 0.0, -100.0)
         subject.import_containers(building)
         props = bpy.context.scene.BIMSpatialProperties
         assert len(props.containers) == 2

src/blenderbim/test/tool/test_material.py

@@ -0,0 +1,43 @@
+# 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 bpy
+import ifcopenshell
+import blenderbim.core.tool
+import blenderbim.tool as tool
+from test.bim.bootstrap import NewFile
+from blenderbim.tool.material import Material as subject
+
+
+class TestLink(NewFile):
+    def test_run(self):
+        obj = bpy.data.materials.new("Material")
+        ifc = ifcopenshell.file()
+        material = ifc.createIfcMaterial()
+        subject.link(material, obj)
+        assert obj.BIMObjectProperties.ifc_definition_id == material.id()
+
+
+class TestUnlink(NewFile):
+    def test_run(self):
+        obj = bpy.data.materials.new("Material")
+        ifc = ifcopenshell.file()
+        material = ifc.createIfcMaterial()
+        subject.link(material, obj)
+        subject.unlink(obj)
+        assert obj.BIMObjectProperties.ifc_definition_id == 0