Test that BnB is not used when there are preset inputs

src/wallet/test/coinselector_tests.cpp

@@ -4,6 +4,7 @@
 
 #include "wallet/wallet.h"
 #include "wallet/coinselection.h"
+#include "wallet/coincontrol.h"
 #include "amount.h"
 #include "primitives/transaction.h"
 #include "random.h"
@@ -27,7 +28,7 @@ std::vector<std::unique_ptr<CWalletTx>> wtxn;
 typedef std::set<CInputCoin> CoinSet;
 
 static std::vector<COutput> vCoins;
-static const CWallet testWallet("dummy", CWalletDBWrapper::CreateDummy());
+static CWallet testWallet("dummy", CWalletDBWrapper::CreateDummy());
 static CAmount balance = 0;
 
 CoinEligibilityFilter filter_standard(1, 6, 0);
@@ -72,6 +73,7 @@ static void add_coin(const CAmount& nValue, int nAge = 6*24, bool fIsFromMe = fa
     }
     COutput output(wtx.get(), nInput, nAge, true /* spendable */, true /* solvable */, true /* safe */);
     vCoins.push_back(output);
+    testWallet.AddToWallet(*wtx.get());
     wtxn.emplace_back(std::move(wtx));
 }
 
@@ -222,6 +224,18 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
     add_coin(1);
     vCoins.at(0).nInputBytes = 40; // Make sure that it has a negative effective value. The next check should assert if this somehow got through. Otherwise it will fail
     BOOST_CHECK(!testWallet.SelectCoinsMinConf( 1 * CENT, filter_standard, vCoins, setCoinsRet, nValueRet, coin_selection_params_bnb, bnb_used));
+
+    // Make sure that we aren't using BnB when there are preset inputs
+    empty_wallet();
+    add_coin(5 * CENT);
+    add_coin(3 * CENT);
+    add_coin(2 * CENT);
+    CCoinControl coin_control;
+    coin_control.fAllowOtherInputs = true;
+    coin_control.Select(COutPoint(vCoins.at(0).tx->GetHash(), vCoins.at(0).i));
+    BOOST_CHECK(testWallet.SelectCoins(vCoins, 10 * CENT, setCoinsRet, nValueRet, coin_control, coin_selection_params_bnb, bnb_used));
+    BOOST_CHECK(!bnb_used);
+    BOOST_CHECK(!coin_selection_params_bnb.use_bnb);
 }
 
 BOOST_AUTO_TEST_CASE(knapsack_solver_test)

src/wallet/wallet.h

@@ -667,15 +667,6 @@ private:
     std::mutex mutexScanning;
     friend class WalletRescanReserver;
 
-
-    /**
-     * Select a set of coins such that nValueRet >= nTargetValue and at least
-     * all coins from coinControl are selected; Never select unconfirmed coins
-     * if they are not ours
-     */
-    bool SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet,
-                    const CCoinControl& coin_control, CoinSelectionParams& coin_selection_params, bool& bnb_used) const;
-
     CWalletDB *pwalletdbEncryption;
 
     //! the current wallet version: clients below this version are not able to load the wallet
@@ -768,6 +759,14 @@ public:
         return *dbw;
     }
 
+    /**
+     * Select a set of coins such that nValueRet >= nTargetValue and at least
+     * all coins from coinControl are selected; Never select unconfirmed coins
+     * if they are not ours
+     */
+    bool SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet,
+                    const CCoinControl& coin_control, CoinSelectionParams& coin_selection_params, bool& bnb_used) const;
+
     /** Get a name for this wallet for logging/debugging purposes.
      */
     const std::string& GetName() const { return m_name; }