introduce a new subset_hook_caller instead of remove make_hook_caller

and adapat and refine conftest/global plugin management accordingly

--HG--
branch : more_plugin

testing/test_core.py

@@ -176,25 +176,6 @@ class TestPluginManager:
         l = pm.hook.he_method1.call_extra([he_method1], dict(arg=1))
         assert l == [10]
 
-    def test_make_hook_caller_unregistered(self, pm):
-        class Hooks:
-            def he_method1(self, arg):
-                pass
-        pm.addhooks(Hooks)
-
-        l = []
-        class Plugin:
-            def he_method1(self, arg):
-                l.append(arg * 10)
-        plugin = Plugin()
-        pm.register(plugin)
-        hc = pm.make_hook_caller("he_method1", [plugin])
-        hc(arg=1)
-        assert l == [10]
-        pm.unregister(plugin)
-        hc(arg=2)
-        assert l == [10]
-
     def test_subset_hook_caller(self, pm):
         class Hooks:
             def he_method1(self, arg):
@@ -232,6 +213,11 @@ class TestPluginManager:
         pm.unregister(plugin1)
         hc(arg=2)
         assert l == []
+        l[:] = []
+
+        pm.hook.he_method1(arg=1)
+        assert l == [10]
+
 
 
 class TestAddMethodOrdering: