Reinstate start tx setter

chainsyncer/unittest/base.py

@@ -1,5 +1,6 @@
 # standard imports
 import os
+import logging
 
 # external imports
 from hexathon import add_0x
@@ -8,10 +9,12 @@ from hexathon import add_0x
 from chainsyncer.driver import HistorySyncer
 from chainsyncer.error import NoBlockForYou
 
+logg = logging.getLogger().getChild(__name__)
+
 
 class MockTx:
 
-    def __init__(self, tx_hash, index):
+    def __init__(self, index, tx_hash):
         self.hash = tx_hash
         self.index = index
 
@@ -39,21 +42,23 @@ class TestSyncer(HistorySyncer):
         if self.backend.block_height == self.backend.target_block:
             self.running = False
             raise NoBlockForYou()
-        if self.backend.block_height > len(self.tx_counts):
             return []
 
         block_txs = []
-        for i in range(self.tx_counts[self.backend.block_height]):
-            block_txs.append(add_0x(os.urandom(32).hex()))
-      
+        if self.backend.block_height < len(self.tx_counts):
+            for i in range(self.tx_counts[self.backend.block_height]):
+                block_txs.append(add_0x(os.urandom(32).hex()))
+     
+        logg.debug('get tx height {}'.format(self.backend.tx_height))
+        
         return MockBlock(self.backend.block_height, block_txs)
 
 
+    # TODO: implement mock conn instead, and use HeadSyncer.process
     def process(self, conn, block):
         i = 0
         for tx in block.txs:
-            self.process_single(conn, block, tx)
+            self.process_single(conn, block, block.tx(i))
+            self.backend.reset_filter()
             i += 1
         self.backend.set(self.backend.block_height + 1, 0)
-
-