P5-703 add support for categories

tests/test_helpers.py

@@ -0,0 +1,20 @@
+# coding=UTF-8
+
+import unittest2
+from api.helpers import slugify
+
+
+class TestHelpers(unittest2.TestCase):
+
+    def test_slugify(self):
+        self.assertEqual(slugify('HELLO'), 'hello')
+        self.assertEqual(slugify('this is a test'), 'this_is_a_test')
+        self.assertEqual(slugify('___This is a test___'), 'this_is_a_test')
+        self.assertEqual(slugify('this-is-a-test'), 'this_is_a_test')
+        self.assertEqual(slugify('this_is_a__test'), 'this_is_a_test')
+        self.assertEqual(slugify('404'), '404')
+        self.assertEqual(slugify('1,000 reasons you are #1'),
+                         '1000_reasons_you_are_1')
+        self.assertEqual(slugify('Nín hǎo'), 'nin_hao')
+        self.assertEqual(slugify('räksmörgås'), 'raksmorgas')
+        self.assertEqual(slugify('RÄKSMÖRGÅS'), 'raksmorgas')