Rename lib.py to utils.py and add test cases for natural sort

tests/test_lib.py

@@ -1,15 +0,0 @@
-import os
-import sys
-import unittest
-from libs.lib import struct, newAction, newIcon, addActions, fmtShortcut, generateColorByText
-
-class TestLib(unittest.TestCase):
-
-    def test_generateColorByGivingUniceText_noError(self):
-        res = generateColorByText(u'\u958B\u555F\u76EE\u9304')
-        self.assertTrue(res.green() >= 0)
-        self.assertTrue(res.red() >= 0)
-        self.assertTrue(res.blue() >= 0)
-
-if __name__ == '__main__':
-    unittest.main()

tests/test_utils.py

@@ -0,0 +1,22 @@
+import os
+import sys
+import unittest
+from libs.utils import struct, newAction, newIcon, addActions, fmtShortcut, generateColorByText, natural_sort
+
+class TestUtils(unittest.TestCase):
+
+    def test_generateColorByGivingUniceText_noError(self):
+        res = generateColorByText(u'\u958B\u555F\u76EE\u9304')
+        self.assertTrue(res.green() >= 0)
+        self.assertTrue(res.red() >= 0)
+        self.assertTrue(res.blue() >= 0)
+
+    def test_nautalSort_noError(self):
+        l1 = ['f1', 'f11', 'f3' ]
+        exptected_l1 = ['f1', 'f3', 'f11']
+        natural_sort(l1)
+        for idx, val in enumerate(l1):
+            self.assertTrue(val == exptected_l1[idx])
+
+if __name__ == '__main__':
+    unittest.main()