fix integrartion test

lbry/lbry/wallet/orchstr8/node.py

@@ -358,8 +358,11 @@ class BlockchainNode:
             *cmnd_args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT
         )
         out, _ = await process.communicate()
-        self.log.info(out.decode().strip())
-        return out.decode().strip()
+        result = out.decode().strip()
+        self.log.info(result)
+        if result.startswith('error code'):
+            raise Exception(result)
+        return result
 
     def generate(self, blocks):
         self.block_expected += blocks

lbry/tests/integration/test_transactions.py

@@ -131,6 +131,7 @@ class BasicTransactionTests(IntegrationTestCase):
         self.assertTrue(tx.outputs[1].is_change)
 
     async def test_history_edge_cases(self):
+        await self.blockchain.generate(300)
         await self.assertBalance(self.account, '0.0')
         address = await self.account.receiving.get_or_create_usable_address()
         # evil trick: mempool is unsorted on real life, but same order between python instances. reproduce it