Move initializeSettingDefinitions and setting functions to their own function

This means we don't have to instantiate CuraApplication in the tests anymore

cura/CuraApplication.py

@@ -307,7 +307,8 @@ class CuraApplication(QtApplication):
         super().initialize()
 
         self.__sendCommandToSingleInstance()
-        self._initializeSettingDefinitionsAndFunctions()
+        self._initializeSettingDefinitions()
+        self._initializeSettingFunctions()
         self.__addAllResourcesAndContainerResources()
         self.__addAllEmptyContainers()
         self.__setLatestResouceVersionsForVersionUpgrade()
@@ -336,31 +337,40 @@ class CuraApplication(QtApplication):
             resource_path = os.path.join(os.path.abspath(os.path.dirname(__file__)), "..", "resources")
             Resources.addSearchPath(resource_path)
 
-    # Adds custom property types, settings types, and extra operators (functions) that need to be registered in
-    # SettingDefinition and SettingFunction.
-    def _initializeSettingDefinitionsAndFunctions(self):
-        self._cura_formula_functions = CuraFormulaFunctions(self)
-
+    @classmethod
+    def _initializeSettingDefinitions(cls):
         # Need to do this before ContainerRegistry tries to load the machines
-        SettingDefinition.addSupportedProperty("settable_per_mesh", DefinitionPropertyType.Any, default = True, read_only = True)
-        SettingDefinition.addSupportedProperty("settable_per_extruder", DefinitionPropertyType.Any, default = True, read_only = True)
+        SettingDefinition.addSupportedProperty("settable_per_mesh", DefinitionPropertyType.Any, default=True,
+                                               read_only=True)
+        SettingDefinition.addSupportedProperty("settable_per_extruder", DefinitionPropertyType.Any, default=True,
+                                               read_only=True)
         # this setting can be changed for each group in one-at-a-time mode
-        SettingDefinition.addSupportedProperty("settable_per_meshgroup", DefinitionPropertyType.Any, default = True, read_only = True)
-        SettingDefinition.addSupportedProperty("settable_globally", DefinitionPropertyType.Any, default = True, read_only = True)
+        SettingDefinition.addSupportedProperty("settable_per_meshgroup", DefinitionPropertyType.Any, default=True,
+                                               read_only=True)
+        SettingDefinition.addSupportedProperty("settable_globally", DefinitionPropertyType.Any, default=True,
+                                               read_only=True)
 
         # From which stack the setting would inherit if not defined per object (handled in the engine)
         # AND for settings which are not settable_per_mesh:
         # which extruder is the only extruder this setting is obtained from
-        SettingDefinition.addSupportedProperty("limit_to_extruder", DefinitionPropertyType.Function, default = "-1", depends_on = "value")
+        SettingDefinition.addSupportedProperty("limit_to_extruder", DefinitionPropertyType.Function, default="-1",
+                                               depends_on="value")
 
         # For settings which are not settable_per_mesh and not settable_per_extruder:
         # A function which determines the glabel/meshgroup value by looking at the values of the setting in all (used) extruders
-        SettingDefinition.addSupportedProperty("resolve", DefinitionPropertyType.Function, default = None, depends_on = "value")
+        SettingDefinition.addSupportedProperty("resolve", DefinitionPropertyType.Function, default=None,
+                                               depends_on="value")
 
         SettingDefinition.addSettingType("extruder", None, str, Validator)
         SettingDefinition.addSettingType("optional_extruder", None, str, None)
         SettingDefinition.addSettingType("[int]", None, str, None)
 
+
+    # Adds custom property types, settings types, and extra operators (functions) that need to be registered in
+    # SettingDefinition and SettingFunction.
+    def _initializeSettingFunctions(self):
+        self._cura_formula_functions = CuraFormulaFunctions(self)
+
         SettingFunction.registerOperator("extruderValue", self._cura_formula_functions.getValueInExtruder)
         SettingFunction.registerOperator("extruderValues", self._cura_formula_functions.getValuesInAllExtruders)
         SettingFunction.registerOperator("resolveOrValue", self._cura_formula_functions.getResolveOrValue)

tests/Settings/TestProfiles.py

@@ -33,8 +33,7 @@ def collecAllDefinitionIds():
 def collectAllSettingIds():
     VersionUpgradeManager._VersionUpgradeManager__instance = VersionUpgradeManager(MagicMock())
 
-    application = CuraApplication()
-    application._initializeSettingDefinitionsAndFunctions()
+    CuraApplication._initializeSettingDefinitions()
 
     definition_container = DefinitionContainer("whatever")
     with open(os.path.join(os.path.dirname(__file__), "..", "..", "resources", "definitions", "fdmprinter.def.json"), encoding="utf-8") as data: