layer.unassign_layer - support batching #4474

src/ifcopenshell-python/test/api/layer/test_unassign_layer.py

@@ -0,0 +1,39 @@
+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+import test.bootstrap
+import ifcopenshell.api
+
+
+class TestUnassignLayer(test.bootstrap.IFC4):
+    def test_unassign_layer_from_items(self):
+        items = [self.file.createIfcExtrudedAreaSolid() for i in range(3)]
+        layer = self.file.createIfcPresentationLayerAssignment()
+
+        ifcopenshell.api.run("layer.assign_layer", self.file, items=items, layer=layer)
+        ifcopenshell.api.run("layer.unassign_layer", self.file, items=items[2:], layer=layer)
+        assert len(layer.AssignedItems) == 2
+        assert set(layer.AssignedItems) == set(items[:2])
+
+    def test_remove_layer_if_all_items_are_unassigned(self):
+        items = [self.file.createIfcExtrudedAreaSolid() for i in range(3)]
+        layer = self.file.createIfcPresentationLayerAssignment()
+
+        ifcopenshell.api.run("layer.assign_layer", self.file, items=items, layer=layer)
+        ifcopenshell.api.run("layer.unassign_layer", self.file, items=items, layer=layer)
+        assert not self.file.by_type("IfcPresentationLayerAssignment")