Add interrupt test base

chainsyncer/backend/memory.py

@@ -14,6 +14,8 @@ class MemBackend:
         self.flags = 0
         self.target_block = target_block
         self.db_session = None
+        self.filter_names = []
+        self.filter_values = []
 
 
     def connect(self):
@@ -28,6 +30,8 @@ class MemBackend:
         logg.debug('stateless backend received {} {}'.format(block_height, tx_height))
         self.block_height = block_height
         self.tx_height = tx_height
+        for i in range(len(self.filter_values)):
+            self.filter_values[i] = False
 
 
     def get(self):
@@ -39,11 +43,13 @@ class MemBackend:
 
 
     def register_filter(self, name):
-        pass
+        self.filter_names.append(name)
+        self.filter_values.append(False)
 
 
     def complete_filter(self, n):
-        pass
+        self.filter_values[n-1] = True
+        logg.debug('set filter {}'.format(self.filter_names[n-1]))
 
 
     def __str__(self):

chainsyncer/driver.py

@@ -72,6 +72,11 @@ class Syncer:
         self.backend.register_filter(str(f))
 
 
+    def process_single(self, conn, block, tx, block_height, tx_index):
+        self.backend.set(block_height, tx_index)
+        self.filter.apply(conn, block, tx)
+
+
 class BlockPollSyncer(Syncer):
 
     def __init__(self, backend, pre_callback=None, block_callback=None, post_callback=None):
@@ -120,14 +125,16 @@ class HeadSyncer(BlockPollSyncer):
         while True:
             try:
                 tx = block.tx(i)
-                rcpt = conn.do(receipt(tx.hash))
-                tx.apply_receipt(rcpt)
-                self.backend.set(block.number, i)
-                self.filter.apply(conn, block, tx)
             except IndexError as e:
                 logg.debug('index error syncer rcpt get {}'.format(e))
                 self.backend.set(block.number + 1, 0)
                 break
+
+            rcpt = conn.do(receipt(tx.hash))
+            tx.apply_receipt(rcpt)
+    
+            self.process_single(conn, block, tx, block.number, i)
+                        
             i += 1