test: Add test for diffrent signet data directories

- Added a test to verify the Signet data directory when -signetchallenge=51 is correctly set to 'signet_da1745e9'.
- Added a test to verify the main Signet data directory is correctly set to 'signet'.

test/functional/feature_signet.py

@@ -5,6 +5,7 @@
 """Test basic signet functionality"""
 
 from decimal import Decimal
+from os import path
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
@@ -73,6 +74,12 @@ def run_test(self):
 
         assert_equal(self.nodes[4].submitblock(signet_blocks[0]), 'bad-signet-blksig')
 
+        self.log.info("Test that the signet data directory with -signetchallenge=51 is 'signet_da1745e9'")
+        assert_equal(path.basename(self.nodes[0].chain_path), "signet_da1745e9")
+
+        self.log.info("Test that the main signet data directory is 'signet'")
+        assert_equal(path.basename(self.nodes[3].chain_path), "signet")
+
         self.log.info("test that signet logs the network magic on node start")
         with self.nodes[0].assert_debug_log(["Signet derived magic (message start)"]):
             self.restart_node(0)