test: add test for utxo-to-sqlite conversion using named pipe

test/functional/tool_utxo_to_sqlite.py

@@ -3,7 +3,7 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test utxo-to-sqlite conversion tool"""
-import os.path
+import os
 try:
     import sqlite3
 except ImportError:
@@ -38,6 +38,20 @@
 from test_framework.wallet import MiniWallet
 
 
+def calculate_muhash_from_sqlite_utxos(filename):
+    muhash = MuHash3072()
+    con = sqlite3.connect(filename)
+    cur = con.cursor()
+    for (txid_hex, vout, value, coinbase, height, spk_hex) in cur.execute("SELECT * FROM utxos"):
+        # serialize UTXO for MuHash (see function `TxOutSer` in the  coinstats module)
+        utxo_ser = COutPoint(int(txid_hex, 16), vout).serialize()
+        utxo_ser += (height * 2 + coinbase).to_bytes(4, 'little')
+        utxo_ser += CTxOut(value, bytes.fromhex(spk_hex)).serialize()
+        muhash.insert(utxo_ser)
+    con.close()
+    return muhash.digest()[::-1].hex()
+
+
 class UtxoToSqliteTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1
@@ -94,21 +108,22 @@ def run_test(self):
                        check=True, stderr=subprocess.STDOUT)
 
         self.log.info('Verify that both UTXO sets match by comparing their MuHash')
-        muhash = MuHash3072()
-        con = sqlite3.connect(output_filename)
-        cur = con.cursor()
-        for (txid_hex, vout, value, coinbase, height, spk_hex) in cur.execute("SELECT * FROM utxos"):
-            # serialize UTXO for MuHash (see function `TxOutSer` in the  coinstats module)
-            utxo_ser = COutPoint(int(txid_hex, 16), vout).serialize()
-            utxo_ser += (height * 2 + coinbase).to_bytes(4, 'little')
-            utxo_ser += CTxOut(value, bytes.fromhex(spk_hex)).serialize()
-            muhash.insert(utxo_ser)
-        con.close()
-
-        muhash_sqlite = muhash.digest()[::-1].hex()
+        muhash_sqlite = calculate_muhash_from_sqlite_utxos(output_filename)
         muhash_compact_serialized = node.gettxoutsetinfo('muhash')['muhash']
         assert_equal(muhash_sqlite, muhash_compact_serialized)
 
+        self.log.info('Convert UTXO set directly (without intermediate dump) via named pipe')
+        fifo_filename = os.path.join(self.options.tmpdir, "utxos.fifo")
+        os.mkfifo(fifo_filename)
+        output_direct_filename = os.path.join(self.options.tmpdir, "utxos_direct.sqlite")
+        p = subprocess.Popen([sys.executable, utxo_to_sqlite_path, fifo_filename, output_direct_filename],
+                             stderr=subprocess.STDOUT)
+        node.dumptxoutset(fifo_filename, "latest")
+        p.wait()
+        muhash_direct_sqlite = calculate_muhash_from_sqlite_utxos(output_direct_filename)
+        assert_equal(muhash_sqlite, muhash_direct_sqlite)
+        os.remove(fifo_filename)
+
 
 if __name__ == "__main__":
     UtxoToSqliteTest(__file__).main()