wallet test refactor: add CreateSyncedWallet function

No change in behavior. This just moves some code from the ListCoins test
setup to a reusable util function, so it can be reused in a new test in
the next commit.

build_msvc/test_bitcoin/test_bitcoin.vcxproj

@@ -16,6 +16,7 @@
     <ClCompile Include="..\..\src\test\util\*.cpp" />
     <ClCompile Include="..\..\src\wallet\test\*_fixture.cpp" />
     <ClCompile Include="..\..\src\wallet\test\*_tests.cpp" />
+    <ClCompile Include="..\..\src\wallet\test\util.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\libbitcoinconsensus\libbitcoinconsensus.vcxproj">

src/Makefile.test.include

@@ -170,6 +170,8 @@ endif
 
 
 BITCOIN_TEST_SUITE += \
+  wallet/test/util.cpp \
+  wallet/test/util.h \
   wallet/test/wallet_test_fixture.cpp \
   wallet/test/wallet_test_fixture.h \
   wallet/test/init_test_fixture.cpp \

src/wallet/test/util.cpp

@@ -0,0 +1,38 @@
+// Copyright (c) 2021 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <wallet/test/util.h>
+
+#include <chain.h>
+#include <key.h>
+#include <test/util/setup_common.h>
+#include <wallet/wallet.h>
+#include <wallet/walletdb.h>
+
+#include <boost/test/unit_test.hpp>
+
+#include <memory>
+
+std::unique_ptr<CWallet> CreateSyncedWallet(interfaces::Chain& chain, CChain& cchain, const CKey& key)
+{
+    auto wallet = std::make_unique<CWallet>(&chain, "", CreateMockWalletDatabase());
+    {
+        LOCK2(wallet->cs_wallet, ::cs_main);
+        wallet->SetLastBlockProcessed(cchain.Height(), cchain.Tip()->GetBlockHash());
+    }
+    wallet->LoadWallet();
+    {
+        auto spk_man = wallet->GetOrCreateLegacyScriptPubKeyMan();
+        LOCK2(wallet->cs_wallet, spk_man->cs_KeyStore);
+        spk_man->AddKeyPubKey(key, key.GetPubKey());
+    }
+    WalletRescanReserver reserver(*wallet);
+    reserver.reserve();
+    CWallet::ScanResult result = wallet->ScanForWalletTransactions(cchain.Genesis()->GetBlockHash(), 0 /* start_height */, {} /* max_height */, reserver, false /* update */);
+    BOOST_CHECK_EQUAL(result.status, CWallet::ScanResult::SUCCESS);
+    BOOST_CHECK_EQUAL(result.last_scanned_block, cchain.Tip()->GetBlockHash());
+    BOOST_CHECK_EQUAL(*result.last_scanned_height, cchain.Height());
+    BOOST_CHECK(result.last_failed_block.IsNull());
+    return wallet;
+}

src/wallet/test/util.h

@@ -0,0 +1,19 @@
+// Copyright (c) 2021 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_WALLET_TEST_UTIL_H
+#define BITCOIN_WALLET_TEST_UTIL_H
+
+#include <memory>
+
+class CChain;
+class CKey;
+class CWallet;
+namespace interfaces {
+class Chain;
+} // namespace interfaces
+
+std::unique_ptr<CWallet> CreateSyncedWallet(interfaces::Chain& chain, CChain& cchain, const CKey& key);
+
+#endif // BITCOIN_WALLET_TEST_UTIL_H

src/wallet/test/wallet_tests.cpp

@@ -20,6 +20,7 @@
 #include <util/translation.h>
 #include <validation.h>
 #include <wallet/coincontrol.h>
+#include <wallet/test/util.h>
 #include <wallet/test/wallet_test_fixture.h>
 
 #include <boost/test/unit_test.hpp>
@@ -480,20 +481,7 @@ public:
     ListCoinsTestingSetup()
     {
         CreateAndProcessBlock({}, GetScriptForRawPubKey(coinbaseKey.GetPubKey()));
-        wallet = std::make_unique<CWallet>(m_node.chain.get(), "", CreateMockWalletDatabase());
-        {
-            LOCK2(wallet->cs_wallet, ::cs_main);
-            wallet->SetLastBlockProcessed(m_node.chainman->ActiveChain().Height(), m_node.chainman->ActiveChain().Tip()->GetBlockHash());
-        }
-        wallet->LoadWallet();
-        AddKey(*wallet, coinbaseKey);
-        WalletRescanReserver reserver(*wallet);
-        reserver.reserve();
-        CWallet::ScanResult result = wallet->ScanForWalletTransactions(m_node.chainman->ActiveChain().Genesis()->GetBlockHash(), 0 /* start_height */, {} /* max_height */, reserver, false /* update */);
-        BOOST_CHECK_EQUAL(result.status, CWallet::ScanResult::SUCCESS);
-        BOOST_CHECK_EQUAL(result.last_scanned_block, m_node.chainman->ActiveChain().Tip()->GetBlockHash());
-        BOOST_CHECK_EQUAL(*result.last_scanned_height, m_node.chainman->ActiveChain().Height());
-        BOOST_CHECK(result.last_failed_block.IsNull());
+        wallet = CreateSyncedWallet(*m_node.chain, m_node.chainman->ActiveChain(), coinbaseKey);
     }
 
     ~ListCoinsTestingSetup()