can retrieve metaconfig/mixconfig/config in a metaconfig/mixconfig

tests/test_metaconfig.py

@@ -1140,3 +1140,12 @@ def test_metaconfig_force_metaconfig_on_freeze_option():
     config.option('dummy1').property.pop('frozen')
     assert config.option('dummy1').value.get() == 'config'
     assert config.option('dummy1').owner.get() == 'config'
+
+
+def test_meta_get_config():
+    od = make_description()
+    meta = MetaConfig(['name1', 'name2'], optiondescription=od)
+    meta.config.new('meta1', type='metaconfig')
+    assert isinstance(meta.config.get('meta1'), MetaConfig)
+    assert isinstance(meta.config.get('name1'), Config)
+    raises(ConfigError, "meta.config.get('unknown')")

tests/test_mixconfig.py

@@ -1129,3 +1129,14 @@ def test_meta_new_mixconfig():
     conf = Config(od, session_id='conf1')
     meta = MetaConfig([conf])
     assert isinstance(meta.config.new('mixconfig', type="mixconfig"), MixConfig)
+
+
+def test_meta_get_mixconfig():
+    od = make_description()
+    conf = Config(od, session_id='conf1')
+    meta = MetaConfig([conf])
+    meta.config.new('mixconfig', type="mixconfig")
+    assert isinstance(meta.config.get('mixconfig'), MixConfig)
+    raises(ConfigError, "meta.config.get('unknown')")
+    meta.config.get('mixconfig').config.add(MixConfig(od, [], session_id='mixconfig2'))
+    assert isinstance(meta.config.get('mixconfig').config.get('mixconfig2'), MixConfig)