Adding intitial DynamoDB setup and implementing ListTables target

moto/__init__.py

@@ -1,2 +1,3 @@
+from .dynamodb import mock_dynamodb
 from .ec2 import mock_ec2
 from .s3 import mock_s3

moto/dynamodb/__init__.py

@@ -0,0 +1,2 @@
+from .models import dynamodb_backend
+mock_dynamodb = dynamodb_backend.decorator

moto/dynamodb/models.py

@@ -0,0 +1,11 @@
+from moto.core import BaseBackend
+
+class DynamoDBBackend(BaseBackend):
+    
+    def __init__(self):
+        self.tables = {}
+
+    def create_table(self, name):
+        self.tables[name] = None
+
+dynamodb_backend = DynamoDBBackend()

moto/dynamodb/responses.py

@@ -0,0 +1,32 @@
+import re
+import json
+from .models import dynamodb_backend
+
+class DynamoHandler(object):
+    
+    def __init__(self, uri, body, headers):
+        self.uri = uri
+        self.body = body
+        self.headers = headers
+
+    def get_method_name(self, headers):
+        """Parses request headers and extracts part od the X-Amz-Target
+        that corresponds to a method of DynamoHandler
+
+        ie: X-Amz-Target: DynamoDB_20111205.ListTables -> ListTables
+        """
+        match = re.search(r'X-Amz-Target: \w+\.(\w+)', headers)
+        return match.groups()[0]
+
+    def dispatch(self):
+        method = self.get_method_name(self.headers)
+        return getattr(self, method)(self.uri, self.body, self.headers)
+
+    def ListTables(self, uri, body, headers):
+        tables = dynamodb_backend.tables.keys()
+        response = {"TableNames": tables}
+        return json.dumps(response)
+    
+
+def handler(uri, body, headers):
+    return DynamoHandler(uri, body, headers).dispatch()

moto/dynamodb/urls.py

@@ -0,0 +1,5 @@
+from .responses import handler
+
+urls = {
+    "https://dynamodb.us-east-1.amazonaws.com/": handler,
+}

tests/test_dynamodb/test_dynamodb.py

@@ -0,0 +1,12 @@
+import boto
+
+from moto import mock_dynamodb
+from moto.dynamodb import dynamodb_backend
+
+
+@mock_dynamodb
+def test_create_table():
+    name = "TestTable"
+    dynamodb_backend.create_table(name)
+    conn = boto.connect_dynamodb('the_key', 'the_secret')
+    assert conn.list_tables() == ['TestTable']