[FIX] Workflow saving: fix cancel, enforce ows extension

orangecanvas/application/canvasmain.py

@@ -1549,13 +1549,15 @@ def save_scheme_as(self):
             acceptMode=QFileDialog.AcceptSave,
             windowModality=Qt.WindowModal,
             objectName="save-as-ows-filedialog",
+            defaultSuffix=".ows"
         )
         dialog.setNameFilter(self.tr("Orange Workflow (*.ows)"))
-        dialog.exec()
-        files = dialog.selectedFiles()
+        # `deleteLater` can be ivoked before `exec` as PyQt 6.9 doc says, that
+        # it is activated after `exec`, and work on PyQt 5 version well (here)
         dialog.deleteLater()
-        if files:
-            filename = files[0]
+        # dialog.exec waits for user action
+        if dialog.exec():
+            filename = dialog.selectedFiles()[0]
             settings.setValue("last-scheme-dir", os.path.dirname(filename))
             if self.save_scheme_to(curr_scheme, filename):
                 document.setPath(filename)
@@ -1591,7 +1593,7 @@ def save_scheme_to(self, scheme, filename):
                 exc_info=True,
                 parent=self
             )
-            return False
+            return False  # return False here because there is second part
 
         try:
             with open(filename, "wb") as f:
@@ -1608,7 +1610,6 @@ def save_scheme_to(self, scheme, filename):
                 informative_text=self.tr("Choose another location."),
                 parent=self
             )
-            return False
         except PermissionError as ex:
             log.error("%s saving '%s'", type(ex).__name__, filename,
                       exc_info=True)
@@ -1621,7 +1622,6 @@ def save_scheme_to(self, scheme, filename):
                     "another location."),
                 parent=self
             )
-            return False
         except OSError as ex:
             log.error("%s saving '%s'", type(ex).__name__, filename,
                       exc_info=True)
@@ -1632,8 +1632,6 @@ def save_scheme_to(self, scheme, filename):
                 exc_info=True,
                 parent=self
             )
-            return False
-
         except Exception:  # pylint: disable=broad-except
             log.error("Error saving %r to %r", scheme, filename, exc_info=True)
             message_critical(
@@ -1643,7 +1641,7 @@ def save_scheme_to(self, scheme, filename):
                 exc_info=True,
                 parent=self
             )
-            return False
+        return False  # default behaviour
 
     def save_swp(self):
         """

orangecanvas/application/tests/test_mainwindow.py

@@ -1,7 +1,7 @@
 import io
 import os
 import tempfile
-from unittest.mock import patch
+from unittest.mock import patch, Mock
 
 from AnyQt.QtGui import QWhatsThisClickedEvent
 from AnyQt.QtWidgets import (
@@ -149,7 +149,7 @@ class TestMainWindowLoad(TestMainWindowBase):
 
     def setUp(self):
         super().setUp()
-        fd, filename = tempfile.mkstemp()
+        fd, filename = tempfile.mkstemp(suffix=".ows")
         self.file = os.fdopen(fd, "w+b")
         self.filename = filename
 
@@ -182,8 +182,11 @@ def exec(myself):
             myself.setOption(QFileDialog.DontConfirmOverwrite)
             myself.selectFile(self.filename)
             myself.accept()
+            return True
 
-        with patch("AnyQt.QtWidgets.QFileDialog.exec", exec):
+        with (patch("AnyQt.QtWidgets.QFileDialog.exec", exec),
+              patch("AnyQt.QtWidgets.QMessageBox.question",
+                    new=Mock(return_value=QMessageBox.Yes))):
             w.save_scheme()
             self.assertTrue(os.path.samefile(w.current_document().path(), self.filename))