Add test coverage of language files

tests/test_gui/test_gui_i18n.py

@@ -0,0 +1,66 @@
+"""
+novelWriter – Main GUI i18n Tests
+=================================
+
+This file is a part of novelWriter
+Copyright 2018–2022, Veronica Berglyd Olsen
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+"""
+
+import sys
+import novelwriter
+
+import pytest
+
+from PyQt5.QtWidgets import qApp, QMessageBox
+
+LANG_DATA = {}
+if sys.platform.startswith("linux"):
+    try:
+        from setup import buildQtI18n
+        buildQtI18n()
+        LANG_DATA = novelwriter.CONFIG.listLanguages(novelwriter.CONFIG.LANG_NW)
+    except Exception:
+        pass
+
+
+@pytest.mark.gui
+@pytest.mark.skipif(not sys.platform.startswith("linux"), reason="Linux Only")
+@pytest.mark.skipif(not LANG_DATA, reason="No language data")
+@pytest.mark.parametrize("language", [a for a, b in LANG_DATA])
+def testI18n_Localisation(qtbot, monkeypatch, language, fncPath, fncConf):
+    """test loading the gui with a specific language.
+    """
+    monkeypatch.setattr(QMessageBox, "warning", lambda *a: QMessageBox.Ok)
+    monkeypatch.setattr(QMessageBox, "critical", lambda *a: QMessageBox.Ok)
+    monkeypatch.setattr(QMessageBox, "information", lambda *a: QMessageBox.Ok)
+    monkeypatch.setattr(QMessageBox, "question", lambda *a: QMessageBox.Yes)
+
+    # Set the test langauge
+    monkeypatch.setattr("novelwriter.CONFIG", fncConf)
+    fncConf.guiLocale = language
+    fncConf.initLocalisation(qApp)
+
+    nwGUI = novelwriter.main(["--testmode", f"--config={fncPath}", f"--data={fncPath}"])
+    qtbot.addWidget(nwGUI)
+    nwGUI.show()
+    qtbot.wait(20)
+    nwGUI.closeMain()
+
+    # Reset the app language
+    fncConf.guiLocale = "en_GB"
+    fncConf.initLocalisation(qApp)
+
+# END Test testI18n_Localisation