implement get tx by state

tests/base_shep.py

@@ -0,0 +1,35 @@
+# standard imports
+import tempfile
+import unittest
+
+# external imports
+from shep.store.file import SimpleFileStoreFactory
+
+# local imports
+from chainqueue import (
+        Store,
+        Status,
+        )
+
+
+class MockIndexStore:
+
+    def __init__(self):
+        self.store = {}
+
+
+    def put(self, k, v):
+        self.store[k] = v
+
+
+    def get(self, k):
+        return self.store.get(k)
+
+
+class TestShepBase(unittest.TestCase):
+
+    def setUp(self):
+        self.path = tempfile.mkdtemp()
+        factory = SimpleFileStoreFactory(self.path).add
+        self.state = Status(factory)
+        self.store = Store(self.state, MockIndexStore())