test: characterize startup with newly added prune and index

test/functional/feature_pruning.py

@@ -20,6 +20,7 @@ from test_framework.script import (
     OP_RETURN,
 )
 from test_framework.test_framework import BitcoinTestFramework
+from test_framework.test_node import ErrorMatch
 from test_framework.util import (
     assert_equal,
     assert_greater_than,
@@ -470,6 +471,17 @@ class PruneTest(BitcoinTestFramework):
         self.connect_nodes(0, 5)
         self.sync_blocks([self.nodes[0], self.nodes[5]], wait=5, timeout=300)
 
+        self.log.info("Test prune with a new index")
+        self.stop_node(0)
+        node = self.nodes[0]
+        # TODO: Starting prune with a new index must sync the index before pruning.
+        node.assert_start_raises_init_error(
+            extra_args=["-prune=550", "-blockfilterindex=1"],
+            expected_msg="basic block filter index best block of the index goes beyond pruned data",
+            match=ErrorMatch.PARTIAL_REGEX,
+        )
+        self.start_node(0, extra_args=["-prune=550"])
+
         if self.is_wallet_compiled():
             self.log.info("Test wallet re-scan")
             self.test_wallet_rescan()