for a multi mandatory, allow [] with allow_empty_list attribut

test/test_mandatory.py

@@ -16,7 +16,9 @@ def make_description():
                                properties=('mandatory', ))
     stroption3 = StrOption('str3', 'Test string option', multi=True,
                            properties=('mandatory', ))
-    descr = OptionDescription('tiram', '', [stroption, stroption1, stroption2, stroption3])
+    stroption4 = StrOption('str4', 'Test string option', multi=True,
+                           properties=('mandatory', ), allow_empty_list=True)
+    descr = OptionDescription('tiram', '', [stroption, stroption1, stroption2, stroption3, stroption4])
     return descr
 
 
@@ -123,6 +125,17 @@ def test_mandatory_multi_none():
 def test_mandatory_multi_empty():
     descr = make_description()
     config = Config(descr)
+    config.str3 = []
+    assert config.getowner(config.unwrap_from_path('str3')) == 'user'
+    config.read_only()
+    prop = []
+    try:
+        config.str3
+    except PropertiesOptionError as err:
+        prop = err.proptype
+    assert 'mandatory' in prop
+    #
+    config.read_write()
     config.str3 = ['']
     assert config.getowner(config.unwrap_from_path('str3')) == 'user'
     config.read_only()
@@ -132,6 +145,7 @@ def test_mandatory_multi_empty():
     except PropertiesOptionError as err:
         prop = err.proptype
     assert 'mandatory' in prop
+    #
     config.read_write()
     config.str3 = ['yes', '']
     assert config.getowner(config.unwrap_from_path('str3')) == 'user'
@@ -144,6 +158,38 @@ def test_mandatory_multi_empty():
     assert 'mandatory' in prop
 
 
+def test_mandatory_multi_empty_allow_empty_list():
+    descr = make_description()
+    config = Config(descr)
+    config.str4 = []
+    assert config.getowner(config.unwrap_from_path('str4')) == 'user'
+    config.read_only()
+    prop = []
+    config.str4
+    #
+    config.read_write()
+    config.str4 = ['']
+    assert config.getowner(config.unwrap_from_path('str4')) == 'user'
+    config.read_only()
+    prop = []
+    try:
+        config.str4
+    except PropertiesOptionError as err:
+        prop = err.proptype
+    assert 'mandatory' in prop
+    #
+    config.read_write()
+    config.str4 = ['yes', '']
+    assert config.getowner(config.unwrap_from_path('str4')) == 'user'
+    config.read_only()
+    prop = []
+    try:
+        config.str4
+    except PropertiesOptionError as err:
+        prop = err.proptype
+    assert 'mandatory' in prop
+
+
 def test_mandatory_multi_append():
     descr = make_description()
     config = Config(descr)