test: add coverage for rpc error when trying to rescan beyond pruned …

…data

test/functional/feature_pruning.py

@@ -143,6 +143,10 @@ def test_invalid_command_line_options(self):
             extra_args=['-prune=550', '-reindex-chainstate'],
         )
 
+    def test_rescan_blockchain(self):
+        self.restart_node(0, ["-prune=550"])
+        assert_raises_rpc_error(-1, "Can't rescan beyond pruned data. Use RPC call getblockchaininfo to determine your pruned height.", self.nodes[0].rescanblockchain)
+
     def test_height_min(self):
         assert os.path.isfile(os.path.join(self.prunedir, "blk00000.dat")), "blk00000.dat is missing, pruning too early"
         self.log.info("Success")
@@ -480,6 +484,9 @@ def run_test(self):
         self.log.info("Test invalid pruning command line options")
         self.test_invalid_command_line_options()
 
+        self.log.info("Test it's not possible to rescan beyond pruned data")
+        self.test_rescan_blockchain()
+
         self.log.info("Done")
 
 if __name__ == '__main__':