tests: Add test for loadblock option

Makefile.am

@@ -45,7 +45,10 @@ DIST_CONTRIB = $(top_srcdir)/contrib/bitcoin-cli.bash-completion \
 	       $(top_srcdir)/contrib/bitcoind.bash-completion \
 	       $(top_srcdir)/contrib/debian/copyright \
 	       $(top_srcdir)/contrib/init \
-	       $(top_srcdir)/contrib/install_db4.sh
+	       $(top_srcdir)/contrib/install_db4.sh \
+	       $(top_srcdir)/contrib/linearize/linearize-data.py \
+	       $(top_srcdir)/contrib/linearize/linearize-hashes.py
+
 DIST_SHARE = \
   $(top_srcdir)/share/genbuild.sh \
   $(top_srcdir)/share/rpcauth

test/functional/feature_loadblock.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+# Copyright (c) 2017-2019 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 loadblock option
+
+Test the option to start a node with the option loadblock which loads
+a serialized blockchain from a file (usually called bootstrap.dat).
+To generate that file this test uses the helper scripts available
+in contrib/linearize.
+"""
+
+import os
+import subprocess
+import sys
+import tempfile
+import urllib
+
+from test_framework.test_framework import (
+    BitcoinTestFramework,
+)
+from test_framework.util import assert_equal, wait_until
+
+
+class LoadblockTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.setup_clean_chain = True
+        self.num_nodes = 2
+
+    def run_test(self):
+        self.nodes[1].setnetworkactive(state=False)
+        self.nodes[0].generate(100)
+
+        # Parsing the url of our node to get settings for config file
+        data_dir = self.nodes[0].datadir
+        node_url = urllib.parse.urlparse(self.nodes[0].url)
+        cfg_file = os.path.join(data_dir, "linearize.cfg")
+        bootstrap_file = os.path.join(self.options.tmpdir, "bootstrap.dat")
+        genesis_block = self.nodes[0].getblockhash(0)
+        blocks_dir = os.path.join(data_dir, "regtest", "blocks")
+        hash_list = tempfile.NamedTemporaryFile(dir=data_dir,
+                                                mode='w',
+                                                delete=False,
+                                                encoding="utf-8")
+
+        self.log.info("Create linearization config file")
+        with open(cfg_file, "a", encoding="utf-8") as cfg:
+            cfg.write("datadir={}\n".format(data_dir))
+            cfg.write("rpcuser={}\n".format(node_url.username))
+            cfg.write("rpcpassword={}\n".format(node_url.password))
+            cfg.write("port={}\n".format(node_url.port))
+            cfg.write("host={}\n".format(node_url.hostname))
+            cfg.write("output_file={}\n".format(bootstrap_file))
+            cfg.write("max_height=100\n")
+            cfg.write("netmagic=fabfb5da\n")
+            cfg.write("input={}\n".format(blocks_dir))
+            cfg.write("genesis={}\n".format(genesis_block))
+            cfg.write("hashlist={}\n".format(hash_list.name))
+
+        base_dir = self.config["environment"]["SRCDIR"]
+        linearize_dir = os.path.join(base_dir, "contrib", "linearize")
+
+        self.log.info("Run linearization of block hashes")
+        linearize_hashes_file = os.path.join(linearize_dir, "linearize-hashes.py")
+        subprocess.run([sys.executable, linearize_hashes_file, cfg_file],
+                       stdout=hash_list,
+                       check=True)
+
+        self.log.info("Run linearization of block data")
+        linearize_data_file = os.path.join(linearize_dir, "linearize-data.py")
+        subprocess.run([sys.executable, linearize_data_file, cfg_file],
+                       check=True)
+
+        self.log.info("Restart second, unsynced node with bootstrap file")
+        self.stop_node(1)
+        self.start_node(1, ["-loadblock=" + bootstrap_file])
+        wait_until(lambda: self.nodes[1].getblockcount() == 100)
+
+        assert_equal(self.nodes[1].getblockchaininfo()['blocks'], 100)
+        assert_equal(self.nodes[0].getbestblockhash(), self.nodes[1].getbestblockhash())
+
+
+if __name__ == '__main__':
+    LoadblockTest().main()

test/functional/test_runner.py

@@ -197,6 +197,7 @@ BASE_SCRIPTS = [
     'feature_uacomment.py',
     'wallet_coinbase_category.py',
     'feature_filelock.py',
+    'feature_loadblock.py',
     'p2p_dos_header_tree.py',
     'p2p_unrequested_blocks.py',
     'feature_includeconf.py',