Fix tests and add test for reloading

test/test_plugins.py

@@ -10,7 +10,8 @@
 sys.path.append(str(TEST_DATA_DIR))
 importlib.invalidate_caches()
 
-from yt_dlp.plugins import PACKAGE_NAME, directories, load_plugins
+from yt_dlp.plugins import PACKAGE_NAME, PluginType, directories, load_plugins
+from yt_dlp.globals import extractors, postprocessors
 
 
 class TestPlugins(unittest.TestCase):
@@ -24,7 +25,7 @@ def test_extractor_classes(self):
         for module_name in tuple(sys.modules):
             if module_name.startswith(f'{PACKAGE_NAME}.extractor'):
                 del sys.modules[module_name]
-        plugins_ie = load_plugins('extractor', 'IE')
+        plugins_ie = load_plugins(PluginType.EXTRACTORS)
 
         self.assertIn(f'{PACKAGE_NAME}.extractor.normal', sys.modules.keys())
         self.assertIn('NormalPluginIE', plugins_ie.keys())
@@ -43,7 +44,7 @@ def test_extractor_classes(self):
         self.assertIn('InAllPluginIE', plugins_ie.keys())
 
     def test_postprocessor_classes(self):
-        plugins_pp = load_plugins('postprocessor', 'PP')
+        plugins_pp = load_plugins(PluginType.POSTPROCESSORS)
         self.assertIn('NormalPluginPP', plugins_pp.keys())
 
     def test_importing_zipped_module(self):
@@ -57,10 +58,10 @@ def test_importing_zipped_module(self):
                 package = importlib.import_module(f'{PACKAGE_NAME}.{plugin_type}')
                 self.assertIn(zip_path / PACKAGE_NAME / plugin_type, map(Path, package.__path__))
 
-            plugins_ie = load_plugins('extractor', 'IE')
+            plugins_ie = load_plugins(PluginType.EXTRACTORS)
             self.assertIn('ZippedPluginIE', plugins_ie.keys())
 
-            plugins_pp = load_plugins('postprocessor', 'PP')
+            plugins_pp = load_plugins(PluginType.POSTPROCESSORS)
             self.assertIn('ZippedPluginPP', plugins_pp.keys())
 
         finally:
@@ -68,6 +69,45 @@ def test_importing_zipped_module(self):
             os.remove(zip_path)
             importlib.invalidate_caches()  # reset the import caches
 
+    def test_reloading_plugins(self):
+        reload_plugins_path = TEST_DATA_DIR / 'reload_plugins'
+
+        for plugin_type in ('extractor', 'postprocessor'):
+            package = importlib.import_module(f'{PACKAGE_NAME}.{plugin_type}')
+        load_plugins(PluginType.EXTRACTORS)
+        load_plugins(PluginType.POSTPROCESSORS)
+
+        # Remove default folder and add reload_plugin path
+        sys.path.remove(str(TEST_DATA_DIR))
+        sys.path.append(str(reload_plugins_path))
+        importlib.invalidate_caches()
+        try:
+            for plugin_type in ('extractor', 'postprocessor'):
+                package = importlib.import_module(f'{PACKAGE_NAME}.{plugin_type}')
+                self.assertIn(reload_plugins_path / PACKAGE_NAME / plugin_type, map(Path, package.__path__))
+
+            plugins_ie = load_plugins(PluginType.EXTRACTORS)
+            self.assertIn('NormalPluginIE', plugins_ie.keys())
+            self.assertTrue(
+                plugins_ie['NormalPluginIE'].REPLACED,
+                msg='Reloading has not replaced original extractor plugin')
+            self.assertTrue(
+                extractors.get()['NormalPluginIE'].REPLACED,
+                msg='Reloading has not replaced original extractor plugin globally')
+
+            plugins_pp = load_plugins(PluginType.POSTPROCESSORS)
+            self.assertIn('NormalPluginPP', plugins_pp.keys())
+            self.assertTrue(plugins_pp['NormalPluginPP'].REPLACED,
+                            msg='Reloading has not replaced original postprocessor plugin')
+            self.assertTrue(
+                postprocessors.get()['NormalPluginPP'].REPLACED,
+                msg='Reloading has not replaced original postprocessor plugin globally')
+
+        finally:
+            sys.path.remove(str(reload_plugins_path))
+            sys.path.append(str(TEST_DATA_DIR))
+            importlib.invalidate_caches()
+
 
 if __name__ == '__main__':
     unittest.main()

test/testdata/reload_plugins/yt_dlp_plugins/extractor/normal.py

@@ -0,0 +1,9 @@
+from yt_dlp.extractor.common import InfoExtractor
+
+
+class NormalPluginIE(InfoExtractor):
+    REPLACED = True
+
+
+class _IgnoreUnderscorePluginIE(InfoExtractor):
+    pass

test/testdata/reload_plugins/yt_dlp_plugins/postprocessor/normal.py

@@ -0,0 +1,5 @@
+from yt_dlp.postprocessor.common import PostProcessor
+
+
+class NormalPluginPP(PostProcessor):
+    REPLACED = True

test/testdata/yt_dlp_plugins/extractor/normal.py

@@ -2,7 +2,7 @@
 
 
 class NormalPluginIE(InfoExtractor):
-    pass
+    REPLACED = False
 
 
 class _IgnoreUnderscorePluginIE(InfoExtractor):

test/testdata/yt_dlp_plugins/postprocessor/normal.py

@@ -2,4 +2,4 @@
 
 
 class NormalPluginPP(PostProcessor):
-    pass
+    REPLACED = False