Extend the DESCRIBE_SNAPSHOTS_RESPONSE to include the tagSet as documented by AWS. Also refactor the names of the tests I introduced in previous commits to be more descriptive. Finally some code cleanup, removing the get_tags method from classes and instead inherit from the TaggedEC2Resource class.

moto/ec2/responses/elastic_block_store.py

@@ -197,6 +197,14 @@ DESCRIBE_SNAPSHOTS_RESPONSE = """<DescribeSnapshotsResponse xmlns="http://ec2.am
              <volumeSize>{{ snapshot.volume.size }}</volumeSize>
              <description>{{ snapshot.description }}</description>
              <tagSet>
+               {% for tag in snapshot.get_tags() %}
+                 <item>
+                   <resourceId>{{ tag.resource_id }}</resourceId>
+                   <resourceType>{{ tag.resource_type }}</resourceType>
+                   <key>{{ tag.key }}</key>
+                   <value>{{ tag.value }}</value>
+                 </item>
+               {% endfor %}
              </tagSet>
           </item>
       {% endfor %}