test: Check that the GUI interactive reindex works

test/functional/feature_reindex_init.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+# Copyright (c) The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test reindex works on init after a db load failure"""
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_equal
+import os
+import shutil
+
+
+class ReindexInitTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 1
+
+    def run_test(self):
+        node = self.nodes[0]
+        self.stop_nodes()
+
+        self.log.info("Removing the block index leads to init error")
+        shutil.rmtree(node.blocks_path / "index")
+        node.assert_start_raises_init_error(
+            expected_msg=f": Error initializing block database.{os.linesep}"
+            "Please restart with -reindex or -reindex-chainstate to recover.",
+        )
+
+        self.log.info("Allowing the reindex should work fine")
+        self.start_node(0, extra_args=["-test=reindex_after_failure_noninteractive_yes"])
+        assert_equal(node.getblockcount(), 200)
+
+
+if __name__ == "__main__":
+    ReindexInitTest(__file__).main()

test/functional/test_runner.py

@@ -289,6 +289,7 @@ BASE_SCRIPTS = [
     'p2p_leak.py',
     'wallet_encryption.py',
     'feature_dersig.py',
+    'feature_reindex_init.py',
     'feature_cltv.py',
     'rpc_uptime.py',
     'feature_discover.py',