[inotify] Fix not equality implementation for InotifyEvent

Credits goes to @JanzenLiu.

Closes #848.

changelog.rst

@@ -9,7 +9,8 @@ Changelog
 2021-xx-xx • `full history <https://github.com/gorakhargosh/watchdog/compare/v2.1.6...master>`__
 
 - Eliminate timeout in waiting on event queue. (`#861 <https://github.com/gorakhargosh/watchdog/pull/861>`_)
-- Thanks to our beloved contributors: @sattlerc
+- [inotify] Fix ``not`` equality implementation for ``InotifyEvent``. (`#848 <https://github.com/gorakhargosh/watchdog/pull/848>`_)
+- Thanks to our beloved contributors: @sattlerc, @JanzenLiu, @BoboTiG
 
 2.1.6
 ~~~~~

src/watchdog/observers/inotify_c.py

@@ -541,7 +541,7 @@ def __eq__(self, inotify_event):
         return self.key == inotify_event.key
 
     def __ne__(self, inotify_event):
-        return self.key == inotify_event.key
+        return self.key != inotify_event.key
 
     def __hash__(self):
         return hash(self.key)

tests/test_inotify_c.py

@@ -17,7 +17,7 @@
 from watchdog.events import DirCreatedEvent, DirDeletedEvent, DirModifiedEvent
 from watchdog.observers.api import ObservedWatch
 from watchdog.observers.inotify import InotifyFullEmitter, InotifyEmitter
-from watchdog.observers.inotify_c import Inotify, InotifyConstants
+from watchdog.observers.inotify_c import Inotify, InotifyConstants, InotifyEvent
 
 from .shell import mkdtemp, rm
 
@@ -187,3 +187,18 @@ def test_watch_file():
         os.remove(path)
         event, _ = event_queue.get(timeout=5)
         assert repr(event)
+
+
+def test_event_equality():
+    wd_parent_dir = 42
+    filename = "file.ext"
+    full_path = p(filename)
+    event1 = InotifyEvent(
+        wd_parent_dir, InotifyConstants.IN_CREATE, 0, filename, full_path)
+    event2 = InotifyEvent(
+        wd_parent_dir, InotifyConstants.IN_CREATE, 0, filename, full_path)
+    event3 = InotifyEvent(
+        wd_parent_dir, InotifyConstants.IN_ACCESS, 0, filename, full_path)
+    assert event1 == event2
+    assert event1 != event3
+    assert event2 != event3