Update test coverage

tests/conftest.py

@@ -34,6 +34,8 @@ from PyQt6.QtWidgets import QMessageBox
 sys.path.insert(1, str(Path(__file__).parent.parent.absolute()))
 
 from novelwriter import CONFIG, SHARED
+from novelwriter.config import DEF_GUI_DARK, DEF_GUI_LIGHT
+from novelwriter.enum import nwTheme
 
 from tests.mocked import MockGuiMain
 from tests.tools import cleanProject
@@ -60,6 +62,10 @@ def resetConfigVars():
     CONFIG._dLocale = QLocale("en_GB")
     CONFIG._manuals = {"manual": _TMP_ROOT / "manual.pdf"}
     CONFIG.guiLocale = "en_GB"
+    CONFIG.darkTheme = DEF_GUI_DARK
+    CONFIG.lightTheme = DEF_GUI_LIGHT
+    CONFIG.themeMode = nwTheme.LIGHT
+    CONFIG.emphLabels = True  # Ensures better coverage, off by default
     return
 
 
@@ -157,13 +163,21 @@ def mockGUI(qtbot, monkeypatch):
     monkeypatch.setattr(QMessageBox, "result", lambda *a: QMessageBox.StandardButton.Yes)
     gui = MockGuiMain()
     theme = GuiTheme()
-    theme.loadTheme()
     monkeypatch.setattr(SHARED, "_gui", gui)
     monkeypatch.setattr(SHARED, "_theme", theme)
 
     return gui
 
 
+@pytest.fixture(scope="function")
+def mockGUIwithTheme(mockGUI):
+    """Create a mock instance of novelWriter's main GUI class with the
+    theme instance initialised.
+    """
+    SHARED.theme.initThemes()
+    return mockGUI
+
+
 @pytest.fixture(scope="function")
 def nwGUI(qtbot, monkeypatch, functionFixture):
     """Create an instance of the novelWriter GUI."""