From 7e3aa7c8eea6d6bbe5fb02e84863c5e6632f71fc Mon Sep 17 00:00:00 2001
From: zmsmith <zach@yipit.com>
Date: Tue, 19 Feb 2013 20:39:04 -0500
Subject: [PATCH] Adding describe table end point

---
 moto/dynamodb/models.py              | 47 ++++++++++++++++++++++++++--
 moto/dynamodb/responses.py           |  6 ++++
 moto/dynamodb/utils.py               |  6 ++++
 tests/test_dynamodb/test_dynamodb.py | 43 ++++++++++++++++++++++++-
 4 files changed, 99 insertions(+), 3 deletions(-)
 create mode 100644 moto/dynamodb/utils.py

diff --git a/moto/dynamodb/models.py b/moto/dynamodb/models.py
index 46199e625..880e73a8d 100644
--- a/moto/dynamodb/models.py
+++ b/moto/dynamodb/models.py
@@ -1,4 +1,47 @@
+import datetime
+
 from moto.core import BaseBackend
+from .utils import unix_time
+
+
+class Table(object):
+
+    def __init__(self, name, hash_key_attr=None, hash_key_type=None,
+        range_key_attr=None, range_key_type=None, read_capacity=None,
+            write_capacity=None):
+        self.name = name
+        self.hash_key_attr = hash_key_attr
+        self.hash_key_type = hash_key_type
+        self.range_key_attr = range_key_attr
+        self.range_key_type = range_key_type
+        self.read_capacity = read_capacity
+        self.write_capacity = write_capacity
+        self.created_at = datetime.datetime.now()
+
+    @property
+    def describe(self):
+        return {"Table": {
+            "CreationDateTime": unix_time(self.created_at),
+            "KeySchema": {
+                "HashKeyElement": {
+                    "AttributeName": self.hash_key_attr,
+                    "AttributeType": self.hash_key_type
+                },
+                "RangeKeyElement": {
+                    "AttributeName": self.range_key_attr,
+                    "AttributeType": self.range_key_type
+                }
+            },
+            "ProvisionedThroughput": {
+                "ReadCapacityUnits": self.read_capacity,
+                "WriteCapacityUnits": self.write_capacity
+            },
+            "TableName": self.name,
+            "TableStatus": "ACTIVE",
+            "ItemCount": 0,
+            "TableSizeBytes": 0,
+        }
+    }
 
 
 class DynamoDBBackend(BaseBackend):
@@ -6,7 +49,7 @@ class DynamoDBBackend(BaseBackend):
     def __init__(self):
         self.tables = {}
 
-    def create_table(self, name):
-        self.tables[name] = None
+    def create_table(self, name, **params):
+        self.tables[name] = Table(name, **params)
 
 dynamodb_backend = DynamoDBBackend()
diff --git a/moto/dynamodb/responses.py b/moto/dynamodb/responses.py
index 9fc616741..74417c4dc 100644
--- a/moto/dynamodb/responses.py
+++ b/moto/dynamodb/responses.py
@@ -1,5 +1,6 @@
 import re
 import json
+
 from .models import dynamodb_backend
 
 
@@ -28,6 +29,11 @@ class DynamoHandler(object):
         response = {"TableNames": tables}
         return json.dumps(response)
 
+    def DescribeTable(self, uri, body, headers):
+        name = json.loads(body)['TableName']
+        table = dynamodb_backend.tables[name]
+        return json.dumps(table.describe)
+
 
 def handler(uri, body, headers):
     return DynamoHandler(uri, body, headers).dispatch()
diff --git a/moto/dynamodb/utils.py b/moto/dynamodb/utils.py
new file mode 100644
index 000000000..0c11c10cf
--- /dev/null
+++ b/moto/dynamodb/utils.py
@@ -0,0 +1,6 @@
+import datetime
+
+def unix_time(dt):
+    epoch = datetime.datetime.utcfromtimestamp(0)
+    delta = dt - epoch
+    return delta.total_seconds()
diff --git a/tests/test_dynamodb/test_dynamodb.py b/tests/test_dynamodb/test_dynamodb.py
index fc815bfdf..837090aa9 100644
--- a/tests/test_dynamodb/test_dynamodb.py
+++ b/tests/test_dynamodb/test_dynamodb.py
@@ -1,12 +1,53 @@
 import boto
 
+from freezegun import freeze_time
+
 from moto import mock_dynamodb
 from moto.dynamodb import dynamodb_backend
 
 
 @mock_dynamodb
 def test_list_tables():
-    name = "TestTable"
+    name = 'TestTable'
     dynamodb_backend.create_table(name)
     conn = boto.connect_dynamodb('the_key', 'the_secret')
     assert conn.list_tables() == ['TestTable']
+
+
+@freeze_time("2012-01-14")
+@mock_dynamodb
+def test_describe_table():
+    dynamodb_backend.create_table('messages',
+        hash_key_attr='forum_name',
+        hash_key_type='S',
+        range_key_attr='subject',
+        range_key_type='S',
+        read_capacity=10,
+        write_capacity=10,
+    )
+    conn = boto.connect_dynamodb('the_key', 'the_secret')
+    expected = {
+                'Table': {
+                    'CreationDateTime': 1326499200.0,
+                    'ItemCount': 0,
+                    'KeySchema': {
+                        'HashKeyElement': {
+                            'AttributeName': 'forum_name',
+                            'AttributeType': 'S'
+                        },
+                        'RangeKeyElement': {
+                            'AttributeName': 'subject',
+                            'AttributeType': 'S'
+                        }
+                    },
+                    'ProvisionedThroughput': {
+                        'ReadCapacityUnits': 10,
+                        'WriteCapacityUnits': 10
+                    },
+                    'TableName': 'messages',
+                    'TableSizeBytes': 0,
+                    'TableStatus': 'ACTIVE'
+                }
+            }
+    import pdb; pdb.set_trace()
+    assert conn.describe_table('messages') == expected