Add test for the main error handler

tests/test_error.py

@@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+"""novelWriter Error Tester
+"""
+
+import nw
+import sys
+import pytest
+
+from nwtools import getGuiItem
+
+from PyQt5.QtCore import Qt, QTimer
+from PyQt5.QtWidgets import qApp, QDialogButtonBox
+
+from nw.error import NWErrorMessage, exceptionHandler
+
+@pytest.mark.error
+def testErrorDialog(qtbot, nwFuncTemp, nwTemp):
+    nwGUI = nw.main(["--testmode", "--config=%s" % nwFuncTemp, "--data=%s" % nwTemp])
+    qtbot.addWidget(nwGUI)
+    nwGUI.show()
+    qtbot.waitForWindowShown(nwGUI)
+
+    nwErr = NWErrorMessage(nwGUI)
+    nwErr.show()
+
+    # Invalid Error
+    nwErr.setMessage(Exception, "Faulty Error", 123)
+    assert nwErr.msgBody.toPlainText() == "Failed to generate error report ..."
+
+    # Valid Error
+    nwErr.setMessage(Exception, "First Error", sys.last_traceback)
+    theMessage = nwErr.msgBody.toPlainText()
+    assert theMessage
+    assert "First Error" in theMessage
+    assert "Exception" in theMessage
+    nwErr._doClose()
+    nwErr.close()
+    del nwErr
+
+    # Exception Handler
+    def handleDialog():
+        while not isinstance(nwGUI.activeDialog, NWErrorMessage):
+            qApp.processEvents()
+
+        nwErr = nwGUI.activeDialog
+        theMessage = nwErr.msgBody.toPlainText()
+        assert theMessage
+        assert "Second Error" in theMessage
+        assert "Exception" in theMessage
+        btnClose = nwErr.btnBox.button(QDialogButtonBox.Close)
+        qtbot.mouseClick(btnClose, Qt.LeftButton, delay=1)
+
+    QTimer.singleShot(0, handleDialog)
+    exceptionHandler(Exception, "Second Error", sys.last_traceback)
+
+    nwGUI.closeMain()
+
+    # qtbot.stopForInteraction()