Increases test coverage for the common utils

Adds test case for the isotime stuff and removes
unused legacy utility functions

Change-Id: I6fa2bb6e2699b1050039fa03d1c0a5ecbd651d73

glance/common/utils.py

@@ -76,31 +76,6 @@ def import_object(import_str):
         return cls()
 
 
-def abspath(s):
-    return os.path.join(os.path.dirname(__file__), s)
-
-
-def debug(arg):
-    logging.debug('debug in callback: %s', arg)
-    return arg
-
-
-def generate_uid(topic, size=8):
-    return '%s-%s' % (topic, ''.join(
-        [random.choice('01234567890abcdefghijklmnopqrstuvwxyz')
-         for x in xrange(size)]))
-
-
-def generate_mac():
-    mac = [0x02, 0x16, 0x3e, random.randint(0x00, 0x7f),
-           random.randint(0x00, 0xff), random.randint(0x00, 0xff)]
-    return ':'.join(map(lambda x: "%02x" % x, mac))
-
-
-def last_octet(address):
-    return int(address.split(".")[-1])
-
-
 def isotime(at=None):
     if not at:
         at = datetime.datetime.utcnow()
@@ -125,34 +100,3 @@ def safe_remove(path):
     except OSError, e:
         if e.errno != errno.ENOENT:
             raise
-
-
-class LazyPluggable(object):
-    """A pluggable backend loaded lazily based on some value."""
-
-    def __init__(self, pivot, **backends):
-        self.__backends = backends
-        self.__pivot = pivot
-        self.__backend = None
-
-    def __get_backend(self):
-        if not self.__backend:
-            backend_name = self.__pivot.value
-            if backend_name not in self.__backends:
-                raise exception.Error('Invalid backend: %s' % backend_name)
-
-            backend = self.__backends[backend_name]
-            if type(backend) == type(tuple()):
-                name = backend[0]
-                fromlist = backend[1]
-            else:
-                name = backend
-                fromlist = backend
-
-            self.__backend = __import__(name, None, None, fromlist)
-            logging.info('backend %s', self.__backend)
-        return self.__backend
-
-    def __getattr__(self, key):
-        backend = self.__get_backend()
-        return getattr(backend, key)

glance/tests/unit/test_misc.py

@@ -17,6 +17,8 @@
 
 import os
 import commands
+import datetime
+import re
 import unittest
 
 from glance.common import exception
@@ -101,3 +103,26 @@ def test_import_class_or_object(self):
 
         self.assertRaises(exception.ImportFailure, utils.import_object,
                           'os.path.NONEXISTINGOBJECT')
+
+        store_class = utils.import_class('glance.store.s3.Store')
+
+        self.assertTrue(store_class.__name__ == 'Store')
+
+        # Try importing an object by supplying a class and
+        # verify the object's class name is the same as that supplied
+        store_obj = utils.import_object('glance.store.s3.Store')
+
+        self.assertTrue(store_obj.__class__.__name__ == 'Store')
+
+        # Try importing a module itself
+        module_obj = utils.import_object('glance.registry')
+
+        self.assertEqual('glance.registry', module_obj.__package__)
+
+    def test_isotime(self):
+        dt1 = datetime.datetime(2001, 11, 10, 1, 2, 3)
+        self.assertEqual('2001-11-10T01:02:03Z', utils.isotime(dt1))
+
+        iso_re = re.compile(r'^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z')
+        now_iso = utils.isotime()
+        self.assertTrue(iso_re.match(now_iso) is not None)