Prepare integration test

tests/base_shep.py

@@ -4,6 +4,7 @@ import unittest
 
 # external imports
 from shep.store.file import SimpleFileStoreFactory
+from chainlib.chain import ChainSpec
 
 # local imports
 from chainqueue import (
@@ -11,6 +12,10 @@ from chainqueue import (
         Status,
         )
 
+# test imports
+from tests.common import MockCounter
+
+
 
 class MockContentStore:
 
@@ -26,18 +31,6 @@ class MockContentStore:
         return self.store.get(k)
 
 
-class MockCounter:
-
-    def __init__(self):
-        self.c = 0
-
-
-    def next(self):
-        c = self.c
-        self.c += 1
-        return c
-
-
 class TestShepBase(unittest.TestCase):
 
     def setUp(self):
@@ -46,4 +39,5 @@ class TestShepBase(unittest.TestCase):
         self.state = Status(factory)
         content_store = MockContentStore()
         counter = MockCounter()
-        self.store = Store(self.state, content_store, counter)
+        chain_spec = ChainSpec('foo', 'bar', 42, 'baz')
+        self.store = Store(chain_spec, self.state, content_store, counter)