Report on-disk size in gettxoutsetinfo

test/functional/blockchain.py

@@ -50,6 +50,9 @@ class BlockchainTest(BitcoinTestFramework):
         assert_equal(res['height'], 200)
         assert_equal(res['txouts'], 200)
         assert_equal(res['bestblock'], node.getblockhash(200))
+        size = res['disk_size']
+        assert size > 6400
+        assert size < 64000
         assert_equal(len(res['bestblock']), 64)
         assert_equal(len(res['hash_serialized_2']), 64)