correctly refresh exceptions cache

medusa/scene_exceptions.py

@@ -41,7 +41,10 @@ def refresh_exceptions_cache(series_obj=None):
     logger.info('Updating exception_cache and exception_season_cache')
 
     # Empty the module level variables
-    exceptions_cache.clear()
+    if not series_obj:
+        exceptions_cache.clear()
+    else:
+        exceptions_cache[(series_obj.indexer, series_obj.series_id)].clear()
 
     main_db_con = db.DBConnection()
     query = """

tests/test_scene_exceptions.py

@@ -0,0 +1,46 @@
+# coding=utf-8
+"""Tests for medusa.scene_exceptions module."""
+
+from medusa.scene_exceptions import refresh_exceptions_cache, get_season_from_name
+
+def test_referesh_series(monkeypatch_function_return, create_tvshow):
+    series1 = create_tvshow(indexerid=1, name='series1')
+    series2 = create_tvshow(indexerid=2, name='series2')
+
+    # do an initial load of all exceptions
+    initial_exceptions = [('medusa.db.DBConnection.select', [
+        {
+                'indexer': 1,
+                'series_id': 1,
+                'season': 1,
+                'title': 'exception1',
+                'custom': False
+        },
+        {
+                'indexer': 1,
+                'series_id': 2,
+                'season': 1,
+                'title': 'exception2',
+                'custom': False
+        }])]
+    monkeypatch_function_return(initial_exceptions)
+    refresh_exceptions_cache()
+
+    assert get_season_from_name(series1, 'exception1') == 1
+    assert get_season_from_name(series2, 'exception2') == 1
+
+    # only refresh series2
+    series_exceptions = [('medusa.db.DBConnection.select', [
+        {
+                'indexer': 1,
+                'series_id': 2,
+                'season': 2,
+                'title': 'exception2 modified',
+                'custom': False
+        }])]
+    monkeypatch_function_return(series_exceptions)
+    refresh_exceptions_cache(series_obj=series2)
+
+    # both series should be present in the exceptions cache
+    assert get_season_from_name(series1, 'exception1') == 1
+    assert get_season_from_name(series2, 'exception2 modified') == 2