From e7735c3ee1661ad4269ac9862c61600714668ff0 Mon Sep 17 00:00:00 2001
From: Andrew Garrett <2rs2ts@users.noreply.github.com>
Date: Sat, 4 Mar 2017 20:12:55 -0800
Subject: [PATCH] Add event IDs to CF Stack events (#852)

So that events can be uniquely identified.

I tried to match the format documented here:
http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-listing-event-history.html
---
 moto/cloudformation/models.py                                   | 2 ++
 tests/test_cloudformation/test_cloudformation_stack_crud.py     | 1 +
 .../test_cloudformation/test_cloudformation_stack_crud_boto3.py | 1 +
 3 files changed, 4 insertions(+)

diff --git a/moto/cloudformation/models.py b/moto/cloudformation/models.py
index a9dda8fdc..e9493b2b6 100644
--- a/moto/cloudformation/models.py
+++ b/moto/cloudformation/models.py
@@ -1,6 +1,7 @@
 from __future__ import unicode_literals
 from datetime import datetime
 import json
+import uuid
 
 import boto.cloudformation
 from moto.core import BaseBackend
@@ -105,6 +106,7 @@ class FakeEvent(object):
         self.resource_status_reason = resource_status_reason
         self.resource_properties = resource_properties
         self.timestamp = datetime.utcnow()
+        self.event_id = uuid.uuid4()
 
 
 class CloudFormationBackend(BaseBackend):
diff --git a/tests/test_cloudformation/test_cloudformation_stack_crud.py b/tests/test_cloudformation/test_cloudformation_stack_crud.py
index 7eb563c42..1a2d16e94 100644
--- a/tests/test_cloudformation/test_cloudformation_stack_crud.py
+++ b/tests/test_cloudformation/test_cloudformation_stack_crud.py
@@ -522,6 +522,7 @@ def test_describe_stack_events_shows_create_update_and_delete():
         for event in events:
             event.stack_id.should.equal(stack_id)
             event.stack_name.should.equal("test_stack")
+            event.event_id.should.match(r"[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}")
 
             if event.resource_type == "AWS::CloudFormation::Stack":
                 event.logical_resource_id.should.equal("test_stack")
diff --git a/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py b/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
index 98ed213e5..112b8bd04 100644
--- a/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
+++ b/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
@@ -358,6 +358,7 @@ def test_stack_events():
         for event in events:
             event.stack_id.should.equal(stack.stack_id)
             event.stack_name.should.equal("test_stack")
+            event.event_id.should.match(r"[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}")
 
             if event.resource_type == "AWS::CloudFormation::Stack":
                 event.logical_resource_id.should.equal("test_stack")