Refactor: Move common fixtures to 'conftest'.

Part of CURA-6091.

tests/conftest.py

@@ -3,7 +3,7 @@
 
 # The purpose of this class is to create fixtures or methods that can be shared among all tests.
 
-import unittest.mock
+from unittest.mock import MagicMock, patch
 import pytest
 
 # Prevents error: "PyCapsule_GetPointer called with incorrect name" with conflicting SIP configurations between Arcus and PyQt: Import Arcus and Savitar first!
@@ -13,16 +13,51 @@ from UM.Qt.QtApplication import QtApplication  # QtApplication import is require
 # Even though your IDE says these files are not used, don't believe it. It's lying. They need to be there.
 
 from cura.CuraApplication import CuraApplication
+from cura.Settings.ExtruderManager import ExtruderManager
+from cura.Settings.MachineManager import MachineManager
 from cura.UI.MachineActionManager import MachineActionManager
+from UM.Settings.ContainerRegistry import ContainerRegistry
 
 # Create a CuraApplication object that will be shared among all tests. It needs to be initialized.
 # Since we need to use it more that once, we create the application the first time and use its instance afterwards.
 @pytest.fixture()
 def application() -> CuraApplication:
-    app = unittest.mock.MagicMock()
+    app = MagicMock()
     return app
 
 # Returns a MachineActionManager instance.
 @pytest.fixture()
 def machine_action_manager(application) -> MachineActionManager:
     return MachineActionManager(application)
+
+@pytest.fixture()
+def global_stack():
+    return MagicMock(name="Global Stack")
+
+@pytest.fixture()
+def container_registry(application, global_stack) -> ContainerRegistry:
+  result = MagicMock()
+  result.findContainerStacks = MagicMock(return_value = [global_stack])
+  application.getContainerRegistry = MagicMock(return_value = result)
+  return result
+
+@pytest.fixture()
+def extruder_manager(application, container_registry) -> ExtruderManager:
+    if ExtruderManager.getInstance() is not None:
+        # Reset the data
+        ExtruderManager._ExtruderManager__instance = None
+
+    with patch("cura.CuraApplication.CuraApplication.getInstance", MagicMock(return_value=application)):
+        with patch("UM.Settings.ContainerRegistry.ContainerRegistry.getInstance", MagicMock(return_value=container_registry)):
+            manager = ExtruderManager()
+    return manager
+
+
+@pytest.fixture()
+def machine_manager(application, extruder_manager, container_registry, global_stack) -> MachineManager:
+    application.getExtruderManager = MagicMock(return_value = extruder_manager)
+    application.getGlobalContainerStack = MagicMock(return_value = global_stack)
+    with patch("UM.Settings.ContainerRegistry.ContainerRegistry.getInstance", MagicMock(return_value=container_registry)):
+        manager = MachineManager(application)
+
+    return manager