[wallet] Add regression test for vValue sort order

- [wallet] Add regression test for vValue sort order
- [trivial] Merge test cases and replace CENT with COIN

Github-Pull: #7293
Rebased-From: fa3c7e6 faf538b

Author: MarcoFalke

src/wallet/test/wallet_tests.cpp

@@ -328,23 +328,36 @@ BOOST_AUTO_TEST_CASE(coin_selection_tests)
     empty_wallet();
 }
 
-BOOST_AUTO_TEST_CASE(pruning_in_ApproximateBestSet)
+BOOST_AUTO_TEST_CASE(ApproximateBestSubset)
 {
     CoinSet setCoinsRet;
     CAmount nValueRet;
 
     LOCK(wallet.cs_wallet);
 
     empty_wallet();
+
+    // Test vValue sort order
+    for (int i = 0; i < 1000; i++)
+        add_coin(1000 * COIN);
+    add_coin(3 * COIN);
+
+    BOOST_CHECK(wallet.SelectCoinsMinConf(1003 * COIN, 1, 6, vCoins, setCoinsRet, nValueRet));
+    BOOST_CHECK_EQUAL(nValueRet, 1003 * COIN);
+    BOOST_CHECK_EQUAL(setCoinsRet.size(), 2U);
+
+    empty_wallet();
+
+    // Test trimming
     for (int i = 0; i < 100; i++)
-        add_coin(10 * CENT);
+        add_coin(10 * COIN);
     for (int i = 0; i < 100; i++)
-        add_coin(1000 * CENT);
+        add_coin(1000 * COIN);
 
-    BOOST_CHECK(wallet.SelectCoinsMinConf(100001 * CENT, 1, 6, vCoins, setCoinsRet, nValueRet));
+    BOOST_CHECK(wallet.SelectCoinsMinConf(100001 * COIN, 1, 6, vCoins, setCoinsRet, nValueRet));
     // We need all 100 larger coins and exactly one small coin.
-    // Superfluous small coins must be pruned:
-    BOOST_CHECK_EQUAL(nValueRet, 100010 * CENT);
+    // Superfluous small coins must be trimmed from the set:
+    BOOST_CHECK_EQUAL(nValueRet, 100010 * COIN);
     BOOST_CHECK_EQUAL(setCoinsRet.size(), 101);
 }