Add Layer2.delete_vault

This allow layer2 to be used to both create and
delete vaults.  I've also added the start of integration tests for
layer2 that will create, retrieve, and delete a vault.

boto/glacier/layer2.py

@@ -45,6 +45,25 @@ def create_vault(self, name):
         self.layer1.create_vault(name)
         return self.get_vault(name)
 
+    def delete_vault(self, name):
+        """Delete a vault.
+
+        This operation deletes a vault. Amazon Glacier will delete a
+        vault only if there are no archives in the vault as per the
+        last inventory and there have been no writes to the vault
+        since the last inventory. If either of these conditions is not
+        satisfied, the vault deletion fails (that is, the vault is not
+        removed) and Amazon Glacier returns an error.
+
+        This operation is idempotent, you can send the same request
+        multiple times and it has no further effect after the first
+        time Amazon Glacier delete the specified vault.
+
+        :type vault_name: str
+        :param vault_name: The name of the vault to delete.
+        """
+        return self.layer1.delete_vault(name)
+
     def get_vault(self, name):
         """
         Get an object representing a named vault from Glacier. This

tests/integration/glacier/test_layer2.py

@@ -0,0 +1,45 @@
+# Copyright (c) 2012 Amazon.com, Inc. or its affiliates.  All Rights Reserved
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish, dis-
+# tribute, sublicense, and/or sell copies of the Software, and to permit
+# persons to whom the Software is furnished to do so, subject to the fol-
+# lowing conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
+# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+#
+import time
+from tests.unit import unittest
+
+from boto.glacier.layer2 import Layer1, Layer2
+
+
+class TestGlacierLayer2(unittest.TestCase):
+    glacier = True
+
+    def setUp(self):
+        self.layer2 = Layer2()
+        self.vault_name = 'testvault%s' % int(time.time())
+
+    def test_create_delete_vault(self):
+        vault = self.layer2.create_vault(self.vault_name)
+        retrieved_vault = self.layer2.get_vault(self.vault_name)
+        self.layer2.delete_vault(self.vault_name)
+        self.assertEqual(vault.name, retrieved_vault.name)
+        self.assertEqual(vault.arn, retrieved_vault.arn)
+        self.assertEqual(vault.creation_date, retrieved_vault.creation_date)
+        self.assertEqual(vault.last_inventory_date,
+                         retrieved_vault.last_inventory_date)
+        self.assertEqual(vault.number_of_archives,
+                         retrieved_vault.number_of_archives)