Add tests on SettingValidator class for major methods

solves #58

tests/settings/test_validator.py

@@ -0,0 +1,57 @@
+#-*- coding: utf-8 -*-
+
+import unittest
+from unittest import mock
+from unittest.mock import patch
+
+from lodel.exceptions import *
+from lodel.settings.validator import *
+
+class SettingValidatorTestCase(unittest.TestCase):
+    
+    def test_init_basic(self):
+        """ Testing the SettingsValidator class instanciation"""
+        valid = SettingValidator('string')
+        #trying to call it
+        valid('test')
+
+    def test_init_badname(self):
+        """ Testing SettingValidator instanciation with non existing validator
+            name"""
+        with self.assertRaises(LodelFatalError):
+            SettingValidator('qklfhsdufgsdyfugigsdfsdlcknsdp')
+
+    def test_noneswitch(self):
+        """ Testing the none_is_valid switch given at validator instanciation
+        """
+        none_invalid = SettingValidator('int')
+        none_valid = SettingValidator('int', none_is_valid = True)
+
+        none_valid(None)
+        with self.assertRaises(SettingsValidationError):
+            none_invalid(None)
+
+    def test_validator_registration(self):
+        """ Testing the register_validator method of SettingValidator """
+        mockfun = mock.MagicMock()
+        vname = 'lfkjdshfkuhsdygsuuyfsduyf'
+        testval = 'foo'
+        SettingValidator.register_validator(vname, mockfun, 'test validator')
+        #Using registered validator
+        valid = SettingValidator(vname)
+        valid(testval)
+        mockfun.assert_called_once_with(testval)
+
+    def test_validator_optargs_forwarding(self):
+        """ Testing the ability for SettingValidator to forward optional
+            arguments """
+        mockfun = mock.MagicMock()
+        vname = 'lkjdsfhsdiufhisduguig'
+        testval = 'azertyuiop'
+        SettingValidator.register_validator(vname, mockfun, 'test validator')
+        #Using registered validator with more arguments
+        valid = SettingValidator(vname,
+            arga = 'a', argb = 42, argc = '1337')
+        valid(testval)
+        mockfun.assert_called_once_with(
+            testval, arga='a', argb=42, argc='1337')