test: Add basic balance coverage to wallet_assumeutxo.py

Author: fjahr

test/functional/wallet_assumeutxo.py

@@ -11,7 +11,9 @@
 - TODO: test loading a wallet (backup) on a pruned node
 
 """
+from test_framework.address import address_to_scriptpubkey
 from test_framework.test_framework import BitcoinTestFramework
+from test_framework.messages import COIN
 from test_framework.util import (
     assert_equal,
     assert_raises_rpc_error,
@@ -65,10 +67,12 @@ def run_test(self):
         # Create a wallet that we will create a backup for later (at snapshot height)
         n0.createwallet('w')
         w = n0.get_wallet_rpc("w")
+        w_address = w.getnewaddress()
 
         # Create another wallet and backup now (before snapshot height)
         n0.createwallet('w2')
         w2 = n0.get_wallet_rpc("w2")
+        w2_address = w2.getnewaddress()
         w2.backupwallet("backup_w2.dat")
 
         # Generate a series of blocks that `n0` will have in the snapshot,
@@ -111,7 +115,13 @@ def run_test(self):
 
         # Mine more blocks on top of the snapshot that n1 hasn't yet seen. This
         # will allow us to test n1's sync-to-tip on top of a snapshot.
-        self.generate(n0, nblocks=100, sync_fun=self.no_op)
+        w_skp = address_to_scriptpubkey(w_address)
+        w2_skp = address_to_scriptpubkey(w2_address)
+        for i in range(100):
+            if i % 3 == 0:
+                self.mini_wallet.send_to(from_node=n0, scriptPubKey=w_skp, amount=1 * COIN)
+                self.mini_wallet.send_to(from_node=n0, scriptPubKey=w2_skp, amount=10 * COIN)
+            self.generate(n0, nblocks=1, sync_fun=self.no_op)
 
         assert_equal(n0.getblockcount(), FINAL_HEIGHT)
         assert_equal(n1.getblockcount(), START_HEIGHT)
@@ -136,6 +146,8 @@ def run_test(self):
 
         self.log.info("Backup from the snapshot height can be loaded during background sync")
         n1.restorewallet("w", "backup_w.dat")
+        # Balance of w wallet is still still 0 because n1 has not synced yet
+        assert_equal(n1.getbalance(), 0)
 
         self.log.info("Backup from before the snapshot height can't be loaded during background sync")
         assert_raises_rpc_error(-4, "Wallet loading failed. Error loading wallet. Wallet requires blocks to be downloaded, and software does not currently support loading wallets while blocks are being downloaded out of order when using assumeutxo snapshots. Wallet should be able to load successfully after node sync reaches height 299", n1.restorewallet, "w2", "backup_w2.dat")
@@ -172,6 +184,13 @@ def run_test(self):
 
         self.log.info("Ensuring wallet can be restored from a backup that was created before the snapshot height")
         n1.restorewallet("w2", "backup_w2.dat")
+        # Check balance of w2 wallet
+        assert_equal(n1.getbalance(), 340)
+
+        # Check balance of w wallet after node is synced
+        n1.loadwallet("w")
+        w = n1.get_wallet_rpc("w")
+        assert_equal(w.getbalance(), 34)
 
 
 if __name__ == '__main__':