fix unit tests to match new decrease calculation

bin/autojump

@@ -239,14 +239,15 @@ def options():
             directory passed as an argument.',
             epilog="Please see autojump(1) man pages for full documentation.")
     parser.add_argument(
-            'directory', metavar='DIR', nargs='*', default='',
+            'directory', metavar='DIRECTORY', nargs='*', default='',
             help='directory to jump to')
     parser.add_argument(
-            '-a', '--add', '--increase', metavar='DIR',
+            '-a', '--add', '--increase', metavar='DIRECTORY',
             help='manually add path to database, or increase path weight for \
             existing paths')
     parser.add_argument(
-            '-d', '--decrease', nargs='?', type=int, const=15, default=False,
+            '-d', '--decrease', metavar='WEIGHT', nargs='?', type=int,
+            const=15, default=False,
             help='manually decrease path weight in database')
     parser.add_argument(
             '-b', '--bash', action="store_true", default=False,

tests/runtests.py

@@ -54,13 +54,12 @@ class TestAutojump(unittest.TestCase):
         self.assertEqual(self.db.get_weight('/2'), 14.142135623730951)
 
     def test_db_decrease(self):
-        self.db.add('/1', 100)
-        self.db.decrease('/a', 42)
-        self.assertTrue(self.db.get_weight('/a') < 100)
+        self.db.add('/1', 10)
+        self.db.decrease('/1', 50)
+        self.assertEquals(self.db.get_weight('/1'), 0)
         self.db.add('/2', 100)
-        self.db.add('/2', 42)
-        self.db.decrease('/2', 42)
-        self.assertEquals(self.db.get_weight('/2'), 100)
+        self.db.decrease('/2', 50)
+        self.assertEquals(self.db.get_weight('/2'), 50)
 
     def test_db_get_weight(self):
         self.assertEqual(self.db.get_weight('/'), 0)