support names in DescribeKeyPairs

moto/ec2/responses/key_pairs.py

@@ -2,6 +2,7 @@ from jinja2 import Template
 from moto.core.responses import BaseResponse
 from moto.ec2.models import ec2_backend
 from moto.ec2.exceptions import InvalidIdError
+from moto.ec2.utils import keypair_names_from_querystring
 
 
 class KeyPairs(BaseResponse):
@@ -23,8 +24,15 @@ class KeyPairs(BaseResponse):
         return Template(DELETE_KEY_PAIR_RESPONSE).render(success=success)
 
     def describe_key_pairs(self):
-        template = Template(DESCRIBE_KEY_PAIRS_RESPONSE)
-        return template.render(keypairs=ec2_backend.describe_key_pairs())
+        names = keypair_names_from_querystring(self.querystring)
+        try:
+            keypairs = ec2_backend.describe_key_pairs(names)
+        except InvalidIdError as exc:
+            template = Template(CREATE_KEY_PAIR_NOT_FOUND)
+            return template.render(keypair_id=exc.id), dict(status=400)
+        else:
+            template = Template(DESCRIBE_KEY_PAIRS_RESPONSE)
+            return template.render(keypairs=keypairs)
 
     def import_key_pair(self):
         raise NotImplementedError('KeyPairs.import_key_pair is not yet implemented')
@@ -58,6 +66,11 @@ CREATE_KEY_PAIR_INVALID_NAME = """<?xml version="1.0" encoding="UTF-8"?>
 """
 
 
+CREATE_KEY_PAIR_NOT_FOUND = """<?xml version="1.0" encoding="UTF-8"?>
+<Response><Errors><Error><Code>InvalidKeyPair.NotFound</Code><Message>The keypair '{{ keypair_id }}' does not exist.</Message></Error></Errors><RequestID>f4f76e81-8ca5-4e61-a6d5-a4a96EXAMPLE</RequestID></Response>
+"""
+
+
 DELETE_KEY_PAIR_RESPONSE = """<DeleteKeyPairResponse xmlns="http://ec2.amazonaws.com/doc/2013-10-15/">
   <requestId>59dbff89-35bd-4eac-99ed-be587EXAMPLE</requestId> 
   <return>{{ success }}</return>

moto/ec2/utils.py

@@ -116,6 +116,15 @@ def filters_from_querystring(querystring_dict):
     return response_values
 
 
+def keypair_names_from_querystring(querystring_dict):
+    keypair_names = []
+    for key, value in querystring_dict.iteritems():
+        if 'KeyName' in key:
+            keypair_names.append(value[0])
+    return keypair_names
+
+
+
 filter_dict_attribute_mapping = {
     'instance-state-name': 'state'
 }

tests/test_ec2/test_key_pairs.py

@@ -31,6 +31,9 @@ def test_key_pairs_create_two():
     assert len(kps) == 2
     assert kps[0].name == 'foo'
     assert kps[1].name == 'bar'
+    kps = conn.get_all_key_pairs('foo')
+    assert len(kps) == 1
+    assert kps[0].name == 'foo'
 
 
 @mock_ec2