- can reset directly custom settings for an option: setting[option].reset()

- option properties are now tuple in internal, and change it to set when needed (that coping data)

test/test_option_setting.py

@@ -308,3 +308,59 @@ def test_access_by_get_whith_hide():
     c = Config(descr)
     c.read_write()
     raises(AttributeError, "c.find(byname='b1')")
+
+
+def test_append_properties():
+    descr = make_description()
+    cfg = Config(descr)
+    setting = cfg.cfgimpl_get_settings()
+    option = cfg.cfgimpl_get_description().gc.dummy
+    assert option._properties == tuple()
+    assert not 'test' in setting[option]
+    setting[option].append('test')
+    assert option._properties == tuple()
+    assert 'test' in setting[option]
+
+
+def test_reset_properties():
+    descr = make_description()
+    cfg = Config(descr)
+    setting = cfg.cfgimpl_get_settings()
+    option = cfg.cfgimpl_get_description().gc.dummy
+    assert setting._properties == {}
+    setting.append('frozen')
+    assert setting._properties == {None: set(('frozen', 'expire', 'validator'))}
+    setting.reset()
+    assert setting._properties == {}
+    setting[option].append('test')
+    assert setting._properties == {option: set(('test',))}
+    setting.reset()
+    assert setting._properties == {option: set(('test',))}
+    setting.append('frozen')
+    assert setting._properties == {None: set(('frozen', 'expire', 'validator')), option: set(('test',))}
+    setting.reset(option)
+    assert setting._properties == {None: set(('frozen', 'expire', 'validator'))}
+    setting[option].append('test')
+    assert setting._properties == {None: set(('frozen', 'expire', 'validator')), option: set(('test',))}
+    setting.reset(all_properties=True)
+    assert setting._properties == {}
+    raises(ValueError, 'setting.reset(all_properties=True, opt=option)')
+
+
+def test_reset_multiple():
+    descr = make_description()
+    cfg = Config(descr)
+    setting = cfg.cfgimpl_get_settings()
+    option = cfg.cfgimpl_get_description().gc.dummy
+    setting.append('frozen')
+    setting[option].append('test')
+    setting.reset()
+    setting.reset()
+    setting.append('frozen')
+    setting[option].append('test')
+    setting.reset(option)
+    setting.reset(option)
+    setting.append('frozen')
+    setting[option].append('test')
+    setting.reset(all_properties=True)
+    setting.reset(all_properties=True)