test: add feature_assumeutxo functional test

Most ideas for test improvements (TODOs) provided by Russ Yanofsky.

1 files changed, 4 insertions, 0 deletions

diff --git a/test/functional/test_framework/test_framework.py b/test/functional/test_framework/test_framework.py
index 73e7516ea7..73635b4397 100755
--- a/test/functional/test_framework/test_framework.py
+++ b/test/functional/test_framework/test_framework.py
@@ -979,3 +979,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
     def is_bdb_compiled(self):
         """Checks whether the wallet module was compiled with BDB support."""
         return self.config["components"].getboolean("USE_BDB")
+
+    def has_blockfile(self, node, filenum: str):
+        blocksdir = os.path.join(node.datadir, self.chain, 'blocks', '')
+        return os.path.isfile(os.path.join(blocksdir, f"blk{filenum}.dat"))