Started books per page algorithm, updated some tests

tests/test_library.py

@@ -1,6 +1,8 @@
 import unittest
+
 # sys.path.insert(1, '../')
 from lib.library import Catalogue
+
 Catalogue = Catalogue()
 
 
@@ -12,9 +14,6 @@ class LibraryTest(unittest.TestCase):
     def test_library_catalogue_filter_books(self):
         self.assertIsNotNone(Catalogue.filter_books())
 
-    def test_library_catalogue_new_files(self):
-        self.assertIsNot(Catalogue.new_files(), False)
-
 
 if __name__ == '__main__':
     unittest.main()