maintain snake in api calls

there were only two methods using camel case for arguments

src/ifcopenshell-python/test/api/group/test_add_group.py

@@ -0,0 +1,37 @@
+# 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
+import ifcopenshell.util.element
+
+
+class TestAddGroup(test.bootstrap.IFC4):
+    def test_add_group_no_arguments(self):
+        group = ifcopenshell.api.run("group.add_group", self.file)
+        assert group.Name == "Unnamed"
+        assert group.Description == None
+
+    def test_add_group(self):
+        group = ifcopenshell.api.run("group.add_group", self.file, name="Name", description="Description")
+        assert group.Name == "Name"
+        assert group.Description == "Description"
+
+
+class TestAddGroupIFC2X3(test.bootstrap.IFC2X3, TestAddGroup):
+    pass

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

@@ -0,0 +1,34 @@
+# 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 TestAddLayer(test.bootstrap.IFC4):
+    def test_add_layer_no_arguments(self):
+        layer = ifcopenshell.api.run("layer.add_layer", self.file)
+        assert layer.Name == "Unnamed"
+
+    def test_assign_additional_items(self):
+        layer = ifcopenshell.api.run("layer.add_layer", self.file, name="Name")
+        assert layer.Name == "Name"
+
+
+class TestAddLayerIFC2X3(test.bootstrap.IFC2X3, TestAddLayer):
+    pass

src/ifcopenshell-python/test/api/root/test_remove_product.py

@@ -409,7 +409,7 @@ class TestRemoveProduct(test.bootstrap.IFC4):
 
     def test_removing_orphaned_group_relationships(self):
         element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
-        group = ifcopenshell.api.run("group.add_group", self.file, Name="Unit 1A")
+        group = ifcopenshell.api.run("group.add_group", self.file, name="Unit 1A")
         ifcopenshell.api.run("group.assign_group", self.file, products=[element], group=group)
         ifcopenshell.api.run("root.remove_product", self.file, product=element)
         assert not self.file.by_type("IfcRelAssignsToGroup")

src/ifcopenshell-python/test/api/test_api.py

@@ -348,3 +348,14 @@ class TestTemporarySupportForDeprecatedAPIArguments(test.bootstrap.IFC4):
         )
         assert get_context(element_type) == None
         assert len(self.file.by_type("IfcRelDeclares")) == 0
+
+    @deprecation_check
+    def test_add_group(self):
+        group = ifcopenshell.api.run("group.add_group", self.file, Name="Name", Description="Description")
+        assert group.Name == "Name"
+        assert group.Description == "Description"
+
+    @deprecation_check
+    def test_add_layer(self):
+        layer = ifcopenshell.api.run("layer.add_layer", self.file, Name="Name")
+        assert layer.Name == "Name"