Support IAM account alias (#1088)

tests/test_iam/test_iam_account_aliases.py

@@ -0,0 +1,20 @@
+import boto3
+import sure  # noqa
+from moto import mock_iam
+
+
+@mock_iam()
+def test_account_aliases():
+    client = boto3.client('iam', region_name='us-east-1')
+
+    alias = 'my-account-name'
+    aliases = client.list_account_aliases()
+    aliases.should.have.key('AccountAliases').which.should.equal([])
+
+    client.create_account_alias(AccountAlias=alias)
+    aliases = client.list_account_aliases()
+    aliases.should.have.key('AccountAliases').which.should.equal([alias])
+
+    client.delete_account_alias(AccountAlias=alias)
+    aliases = client.list_account_aliases()
+    aliases.should.have.key('AccountAliases').which.should.equal([])