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chanfunding: add test for a non-zero change

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Bjarne Magnussen 2020-08-19 12:09:35 +02:00
parent 07549d50ff
commit c56457c869
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1 changed files with 21 additions and 0 deletions
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21
lnwallet/chanfunding/coin_select_test.go
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@ -244,6 +244,27 @@ func TestCoinSelectSubtractFees(t *testing.T) {
expectedFundingAmt: 1*btcutil.SatoshiPerBitcoin - fundingFee(feeRate, 1, false),
expectedChange: 0,
},
{
// We have 1.0 BTC available and spend half of it. This
// should lead to a funding TX with a change output.
name: "spend with change",
coins: []Coin{
{
TxOut: wire.TxOut{
PkScript: p2wkhScript,
Value: 1 * btcutil.SatoshiPerBitcoin,
},
},
},
spendValue: 0.5 * btcutil.SatoshiPerBitcoin,
// The one and only input will be selected.
expectedInput: []btcutil.Amount{
1 * btcutil.SatoshiPerBitcoin,
},
expectedFundingAmt: 0.5*btcutil.SatoshiPerBitcoin - fundingFee(feeRate, 1, true),
expectedChange: 0.5 * btcutil.SatoshiPerBitcoin,
},
{
// The total funds available is below the dust limit
// after paying fees.