Merge #18195: test: Add cost_of_change parameter assertions to bnb_search_test

c72a11a1a030036eb1fe4472086a9733731961ce test: Add cost_of_change parameter assertions to bnb_search_test (Yancy Ribbens)

Pull request description:

  If the `cost_of_change` variable is removed from the method body `SelectCoinsBnB`, there are currently no failing unit tests.  This PR adds assertions about the behavior of the `cost_of_change`:  If the cost of creating a change output is greater than what's leftover, then consume the output and create no change, otherwise, don't consume the output (no match found).

ACKs for top commit:
  achow101:
    ACK c72a11a1a030036eb1fe4472086a9733731961ce

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MarcoFalke 2020-02-29 00:39:50 +07:00 committed by Pasta
parent fae0e0b9aa
commit 44aef1f053
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@ -177,6 +177,19 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
actual_selection.clear();
selection.clear();
// Cost of change is greater than the difference between target value and utxo sum
add_coin(1 * CENT, 1, actual_selection);
BOOST_CHECK(SelectCoinsBnB(GroupCoins(utxo_pool), 0.9 * CENT, 0.5 * CENT, selection, value_ret, not_input_fees));
BOOST_CHECK_EQUAL(value_ret, 1 * CENT);
BOOST_CHECK(equal_sets(selection, actual_selection));
actual_selection.clear();
selection.clear();
// Cost of change is less than the difference between target value and utxo sum
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 0.9 * CENT, 0, selection, value_ret, not_input_fees));
actual_selection.clear();
selection.clear();
// Select 10 Cent
add_coin(5 * CENT, 5, utxo_pool);
add_coin(4 * CENT, 4, actual_selection);