Add support for filtering spot instance requests

moto/ec2/models.py

@@ -1247,6 +1247,16 @@ class SpotInstanceRequest(BotoSpotRequest, TaggedEC2Instance):
             default_group = ec2_backend.get_security_group_from_name("default")
             ls.groups.append(default_group)
 
+    def get_filter_value(self, filter_name):
+        if filter_name == 'state':
+            return self.state
+        elif filter_name.startswith('tag:'):
+            tag_name = filter_name.replace('tag:', '', 1)
+            tags = dict((tag['key'], tag['value']) for tag in self.get_tags())
+            return tags.get(tag_name)
+        else:
+            ec2_backend.raise_not_implemented_error("The filter '{0}' for DescribeSpotInstanceRequests".format(filter_name))
+
 
 @six.add_metaclass(Model)
 class SpotRequestBackend(object):
@@ -1273,8 +1283,14 @@ class SpotRequestBackend(object):
         return requests
 
     @Model.prop('SpotInstanceRequest')
-    def describe_spot_instance_requests(self):
-        return self.spot_instance_requests.values()
+    def describe_spot_instance_requests(self, filters=None):
+        requests = self.spot_instance_requests.values()
+
+        if filters:
+            for (_filter, _filter_value) in filters.items():
+                requests = [ request for request in requests if request.get_filter_value(_filter) in _filter_value ]
+
+        return requests
 
     def cancel_spot_instance_requests(self, request_ids):
         requests = []

moto/ec2/responses/spot_instances.py

@@ -3,6 +3,7 @@ from jinja2 import Template
 
 from moto.core.responses import BaseResponse
 from moto.ec2.models import ec2_backend
+from moto.ec2.utils import filters_from_querystring
 
 
 class SpotInstances(BaseResponse):
@@ -30,7 +31,8 @@ class SpotInstances(BaseResponse):
         raise NotImplementedError('SpotInstances.describe_spot_datafeed_subscription is not yet implemented')
 
     def describe_spot_instance_requests(self):
-        requests = ec2_backend.describe_spot_instance_requests()
+        filters = filters_from_querystring(self.querystring)
+        requests = ec2_backend.describe_spot_instance_requests(filters=filters)
         template = Template(DESCRIBE_SPOT_INSTANCES_TEMPLATE)
         return template.render(requests=requests)
 

tests/test_ec2/test_spot_instances.py

@@ -146,3 +146,37 @@ def test_tag_spot_instance_request():
 
     tag_dict = dict(request.tags)
     tag_dict.should.equal({'tag1' : 'value1', 'tag2' : 'value2'})
+
+
+@mock_ec2
+def test_get_all_spot_instance_requests_filtering():
+    """
+    Test that moto correctly filters spot instance requests
+    """
+    conn = boto.connect_ec2()
+
+    request1 = conn.request_spot_instances(
+        price=0.5, image_id='ami-abcd1234',
+    )
+    request2 = conn.request_spot_instances(
+        price=0.5, image_id='ami-abcd1234',
+    )
+    request3 = conn.request_spot_instances(
+        price=0.5, image_id='ami-abcd1234',
+    )
+    request1[0].add_tag('tag1', 'value1')
+    request1[0].add_tag('tag2', 'value2')
+    request2[0].add_tag('tag1', 'value1')
+    request2[0].add_tag('tag2', 'wrong')
+
+    requests = conn.get_all_spot_instance_requests(filters={'state' : 'active'})
+    requests.should.have.length_of(0)
+
+    requests = conn.get_all_spot_instance_requests(filters={'state' : 'open'})
+    requests.should.have.length_of(3)
+
+    requests = conn.get_all_spot_instance_requests(filters={'tag:tag1' : 'value1'})
+    requests.should.have.length_of(2)
+
+    requests = conn.get_all_spot_instance_requests(filters={'tag:tag1' : 'value1', 'tag:tag2' : 'value2'})
+    requests.should.have.length_of(1)