From b99d87fd6fc9914379cfc46586116618e66a28b1 Mon Sep 17 00:00:00 2001
From: Lucas Biaggi <lucas.biaggi@codethink.co.uk>
Date: Wed, 13 Mar 2024 23:47:48 +0000
Subject: [PATCH] Tests related to loading settings from a given file

---
 doorstop/cli/tests/test_main.py | 11 ++++++++++-
 doorstop/core/tests/__init__.py |  9 +++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/doorstop/cli/tests/test_main.py b/doorstop/cli/tests/test_main.py
index ab304cb5b..4c061ceb7 100644
--- a/doorstop/cli/tests/test_main.py
+++ b/doorstop/cli/tests/test_main.py
@@ -9,7 +9,7 @@
 
 from doorstop import settings
 from doorstop.cli import main
-from doorstop.cli.tests import SettingsTestCase
+from doorstop.cli.tests import FILES, SettingsTestCase
 
 
 class TestMain(SettingsTestCase):
@@ -84,3 +84,12 @@ def test_main(self):
             spec.loader.exec_module(runpy)
             # Assert
             self.assertIsNotNone(runpy)
+
+    @patch("doorstop.cli.commands.run", Mock())
+    def test_run_modified_settings_through_file(self):
+        """Verify --settings has override settings."""
+        main.main(args=["--settings", f"{FILES}/settings_modified.py"])
+        self.assertEqual(settings.MAX_LINE_LENGTH, 20)
+        # rollback to the original value to not impact an item test
+        settings.MAX_LINE_LENGTH = 79
+        self.assertEqual(settings.MAX_LINE_LENGTH, 79)
diff --git a/doorstop/core/tests/__init__.py b/doorstop/core/tests/__init__.py
index be0a50f96..16d8d5d6a 100644
--- a/doorstop/core/tests/__init__.py
+++ b/doorstop/core/tests/__init__.py
@@ -103,6 +103,15 @@ def set_items(self, items):
         self._items = items
 
 
+class MockSimpleDocumentExtensions(MockSimpleDocument):
+    """Mock Document class that enable extensions."""
+
+    def __init__(self, **kwargs):
+        super().__init__()
+        for k, v in kwargs.items():
+            self.extensions[k] = v
+
+
 class MockDocumentSkip(MockDocument):  # pylint: disable=W0223,R0902
     """Mock Document class that is always skipped in tree placement."""