API: Validate if plugin has parent in get_command_line_options

- This can happen in our tests.
- In case the plugin doesn't have a parent, we return our default
cli options.
- Also fix failures in a couple of tests related to cli options.

spyder/api/plugins/new_api.py

@@ -16,6 +16,7 @@
 import logging
 import os
 import os.path as osp
+import sys
 from typing import List, Union
 import warnings
 
@@ -33,6 +34,7 @@
 from spyder.api.widgets.main_widget import PluginMainWidget
 from spyder.api.widgets.mixins import SpyderActionMixin
 from spyder.api.widgets.mixins import SpyderWidgetMixin
+from spyder.app.cli_options import get_options
 from spyder.config.gui import get_color_scheme, get_font
 from spyder.config.manager import CONF
 from spyder.config.user import NoDefault
@@ -671,7 +673,12 @@ def get_command_line_options(self):
 
         See app/cli_options.py for the option names.
         """
-        return self._main._cli_options
+        if self._main is not None:
+            return self._main._cli_options
+        else:
+            # This is necessary when the plugin has no parent.
+            sys_argv = [sys.argv[0]]  # Avoid options passed to pytest
+            return get_options(sys_argv)[0]
 
     # --- API: Mandatory methods to define -----------------------------------
     # ------------------------------------------------------------------------

spyder/app/tests/test_mainwindow.py

@@ -930,7 +930,7 @@ def test_window_title(main_window, tmpdir):
     projects.open_project(path=path)
 
     # Set non-ascii window title
-    main_window.window_title = u'اختبار'
+    main_window._cli_options.window_title = u'اختبار'
 
     # Assert window title is computed without errors
     # and has the expected strings

spyder/plugins/preferences/tests/conftest.py

@@ -9,6 +9,8 @@
 Testing utilities to be used with pytest.
 """
 
+# Standard library imports
+import sys
 import types
 from unittest.mock import Mock, MagicMock
 
@@ -20,6 +22,7 @@
 # Local imports
 from spyder.api.plugins import Plugins
 from spyder.api.plugin_registration.registry import PLUGIN_REGISTRY
+from spyder.app.cli_options import get_options
 from spyder.config.manager import CONF
 from spyder.plugins.preferences.plugin import Preferences
 from spyder.utils.icon_manager import ima
@@ -39,6 +42,10 @@ def __init__(self, parent):
 
         self.console = Mock()
 
+        # To provide command line options for plugins that need them
+        sys_argv = [sys.argv[0]]  # Avoid options passed to pytest
+        self._cli_options = get_options(sys_argv)[0]
+
         PLUGIN_REGISTRY.reset()
         PLUGIN_REGISTRY.sig_plugin_ready.connect(self.register_plugin)
         PLUGIN_REGISTRY.register_plugin(self, Preferences)