Add create user unit test

.vscode/launch.json

@@ -28,6 +28,25 @@
             "args": [
                 "${file}" "-rP"
             ],
+            "env": {
+                "PYTHONPATH": "${workspaceFolder}/GuiApp"
+            },
+            "console": "integratedTerminal",
+            "justMyCode": true
+        },
+        {
+            "name": "pytest: All tests",
+            "type": "python",
+            "request": "launch",
+            "module": "pytest",
+            "args": [
+                "${workspaceFolder}/GuiApp/tests",
+                "-rP",
+                "--maxfail=5"
+            ],
+            "env": {
+                "PYTHONPATH": "${workspaceFolder}/GuiApp"
+            },
             "console": "integratedTerminal",
             "justMyCode": true
         }

GuiApp/tests/testWidgets/test_create_user_screen.py

@@ -0,0 +1,91 @@
+from unittest.mock import patch
+
+from kivy.uix.screenmanager import ScreenManager
+from kivy.lang import Builder
+
+import pytest
+
+from GuiApp.widgets.createUserScreen import CreateUserScreen
+from GuiApp.widgets.loginScreen import LoginScreenWidget
+from GuiApp.database import UserData
+
+
+Builder.load_file("GuiApp/kv/createUserScreen.kv")
+Builder.load_file("GuiApp/kv/#Screen.kv")
+
+
+@pytest.fixture(name="screen_manager")
+@patch(
+    "GuiApp.widgets.loginScreen.getAllPatrons",
+    return_value=[UserData("0", "John", "Doe", "12345")],
+)
+def fixture_screen_manager(mock_get_all_patrons):
+    """Fixture to set up a ScreenManager with CreateUserScreen."""
+    sm = ScreenManager()
+
+    create_user_screen = CreateUserScreen(name="createUserScreen")
+    create_login_screen = LoginScreenWidget(name="loginScreen")
+
+    # mock_get_all_patrons.getAllPatrons.assert_called_once() This should work, i just don't know why
+
+    sm.add_widget(create_user_screen)
+    sm.add_widget(create_login_screen)
+    return sm
+
+
+@patch("GuiApp.widgets.createUserScreen.addPatron")
+def test_register_user(mock_add_patron, screen_manager):
+    """Test the registration logic without touching the real database."""
+
+    create_user_screen = screen_manager.get_screen("createUserScreen")
+
+    # Simulate user input
+    create_user_screen.ids.registerFirstName.text = "John"
+    create_user_screen.ids.registerLastName.text = "Doe"
+    create_user_screen.ids.registerEmployeeID.text = "12345"
+    create_user_screen.ids.errorMessage.opacity = 0
+    assert create_user_screen.ids.registerFirstName.text == "John"
+    assert create_user_screen.ids.registerLastName.text == "Doe"
+    assert create_user_screen.ids.registerEmployeeID.text == "12345"
+    assert create_user_screen.ids.errorMessage.opacity == 0
+
+    create_user_screen.registerUser()
+
+    mock_add_patron.assert_called_with("John", "Doe", "12345")
+
+
+@patch("GuiApp.widgets.createUserScreen.addPatron")
+def test_register_user_first_name_missing(mock_add_patron, screen_manager):
+    """First name is missing"""
+
+    create_user_screen = screen_manager.get_screen("createUserScreen")
+
+    create_user_screen.ids.registerLastName.text = "Doe"
+    create_user_screen.ids.registerEmployeeID.text = "12345"
+    create_user_screen.ids.errorMessage.opacity = 0
+    assert create_user_screen.ids.registerLastName.text == "Doe"
+    assert create_user_screen.ids.registerEmployeeID.text == "12345"
+    assert create_user_screen.ids.errorMessage.opacity == 0
+
+    create_user_screen.registerUser()
+
+    assert create_user_screen.ids.errorMessage.opacity == 1
+    assert create_user_screen.ids.errorMessage.text == "First Name cannot be empty!"
+
+
+@patch("GuiApp.widgets.createUserScreen.addPatron")
+def test_register_user_last_name_missing(mock_add_patron, screen_manager):
+    """Last name is missing"""
+    create_user_screen = screen_manager.get_screen("createUserScreen")
+
+    create_user_screen.ids.registerFirstName.text = "John"
+    create_user_screen.ids.registerEmployeeID.text = "12345"
+    create_user_screen.ids.errorMessage.opacity = 0
+    assert create_user_screen.ids.registerFirstName.text == "John"
+    assert create_user_screen.ids.registerEmployeeID.text == "12345"
+    assert create_user_screen.ids.errorMessage.opacity == 0
+
+    create_user_screen.registerUser()
+
+    assert create_user_screen.ids.errorMessage.opacity == 1
+    assert create_user_screen.ids.errorMessage.text == "Last Name cannot be empty!"