[Test] Introduce PoS testing suite.

src/Makefile.test.include

@@ -84,7 +84,9 @@ BITCOIN_TEST_SUITE = \
 if ENABLE_WALLET
 BITCOIN_TEST_SUITE += \
   wallet/test/wallet_test_fixture.cpp \
-  wallet/test/wallet_test_fixture.h
+  wallet/test/wallet_test_fixture.h \
+  wallet/test/pos_test_fixture.cpp \
+  wallet/test/pos_test_fixture.h
 endif
 
 # test_pivx binary #

src/test/CMakeLists.txt

@@ -88,6 +88,8 @@ set(BITCOIN_TEST_SUITE
         ${CMAKE_CURRENT_SOURCE_DIR}/librust/sapling_test_fixture.cpp
         ${CMAKE_SOURCE_DIR}/src/wallet/test/wallet_test_fixture.h
         ${CMAKE_SOURCE_DIR}/src/wallet/test/wallet_test_fixture.cpp
+        ${CMAKE_SOURCE_DIR}/src/wallet/test/pos_test_fixture.h
+        ${CMAKE_SOURCE_DIR}/src/wallet/test/pos_test_fixture.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/librust/utiltest.h
         ${CMAKE_CURRENT_SOURCE_DIR}/librust/utiltest.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/librust/json_test_vectors.h

src/wallet/test/pos_test_fixture.cpp

@@ -0,0 +1,40 @@
+// Copyright (c) 2021 The PIVX developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://www.opensource.org/licenses/mit-license.php.
+
+#include "wallet/test/pos_test_fixture.h"
+#include "wallet/wallet.h"
+
+#include <boost/test/unit_test.hpp>
+
+TestPoSChainSetup::TestPoSChainSetup() : TestChainSetup(0)
+{
+    initZKSNARKS(); // init zk-snarks lib
+
+    bool fFirstRun;
+    pwalletMain = std::make_unique<CWallet>("testWallet", CWalletDBWrapper::CreateMock());
+    pwalletMain->LoadWallet(fFirstRun);
+    RegisterValidationInterface(pwalletMain.get());
+
+    {
+        LOCK(pwalletMain->cs_wallet);
+        pwalletMain->SetMinVersion(FEATURE_SAPLING);
+        gArgs.ForceSetArg("-keypool", "5");
+        pwalletMain->SetupSPKM(true);
+
+        // import coinbase key used to generate the 100-blocks chain
+        BOOST_CHECK(pwalletMain->AddKeyPubKey(coinbaseKey, coinbaseKey.GetPubKey()));
+    }
+
+    int posActivation = Params().GetConsensus().vUpgrades[Consensus::UPGRADE_POS].nActivationHeight - 1;
+    for (int i = 0; i < posActivation; i++) {
+        CBlock b = CreateAndProcessBlock({}, coinbaseKey);
+        coinbaseTxns.emplace_back(*b.vtx[0]);
+    }
+}
+
+TestPoSChainSetup::~TestPoSChainSetup()
+{
+    SyncWithValidationInterfaceQueue();
+    UnregisterValidationInterface(pwalletMain.get());
+}

src/wallet/test/pos_test_fixture.h

@@ -0,0 +1,24 @@
+// Copyright (c) 2021 The PIVX developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://www.opensource.org/licenses/mit-license.php.
+
+#ifndef PIVX_POS_TEST_FIXTURE_H
+#define PIVX_POS_TEST_FIXTURE_H
+
+#include "test/test_pivx.h"
+
+class CWallet;
+
+/*
+ * A text fixture with a preloaded 250-blocks regtest chain running running on PoS
+ * and a wallet containing the key used for the coinbase outputs.
+ */
+struct TestPoSChainSetup: public TestChainSetup
+{
+    std::unique_ptr<CWallet> pwalletMain;
+
+    TestPoSChainSetup();
+    ~TestPoSChainSetup();
+};
+
+#endif // PIVX_POS_TEST_FIXTURE_H