[lambda] Implement ListFunctions, GetFunction, and DeleteFunction

moto/awslambda/models.py

@@ -0,0 +1,82 @@
+from __future__ import unicode_literals
+
+import datetime
+import boto.awslambda
+from moto.core import BaseBackend
+
+
+class LambdaFunction(object):
+
+    def __init__(self, spec):
+        self.function_name = spec['FunctionName']
+        self.run_time = spec['Runtime']
+        self.role = spec['Role']
+        self.handler = spec['Handler']
+        self.description = spec['Description']
+        self.timeout = spec['Timeout']
+        self.memory_size = spec['MemorySize']
+        self.vpc_config = spec.get('VpcConfig', {})
+        self.code = spec['Code']
+
+        self.version = '$LATEST'
+        self.last_modified = datetime.datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S')
+        self.code_size = 210  # hello world function
+        self.code_sha_256 = 'b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9' # hello world function
+        self.function_arn = 'arn:aws:lambda:123456789012:function:{}'.format(self.function_name)
+
+    def __repr__(self):
+        return json.dumps(self.get_configuration())
+
+    def get_configuration(self):
+        return {
+            "CodeSha256": self.code_sha_256,
+            "CodeSize": self.code_size,
+            "Description": self.description,
+            "FunctionArn": self.function_arn,
+            "FunctionName": self.function_name,
+            "Handler": self.handler,
+            "LastModified": self.last_modified,
+            "MemorySize": self.memory_size,
+            "Role": self.role,
+            "Runtime": self.run_time,
+            "Timeout": self.timeout,
+            "Version": self.version,
+            "VpcConfig": self.vpc_config,
+        }
+
+    def get_code(self):
+        return {
+            "Code": {
+                "Location": "s3://lambda-functions.aws.amazon.com/{}".format(self.code['S3Key']),
+                "RepositoryType": "S3"
+            },
+            "Configuration": self.get_configuration(),
+        }
+
+
+class LambdaBackend(BaseBackend):
+
+    def __init__(self):
+        self._functions = {}
+    
+    def has_function(self, function_name):
+        return function_name in self._functions
+
+    def create_function(self, spec):
+        fn = LambdaFunction(spec)
+        self._functions[fn.function_name] = fn
+        return fn
+
+    def get_function(self, function_name):
+        return self._functions[function_name]
+
+    def delete_function(self, function_name):
+        del self._functions[function_name]
+
+    def list_functions(self):
+        return self._functions.values()
+
+
+lambda_backends = {}
+for region in boto.awslambda.regions():
+    lambda_backends[region.name] = LambdaBackend()