test: add test_legacy_create_tx_custom_fee_rate()

Author: luisschwab

wallet/tests/wallet.rs

@@ -945,6 +945,20 @@ fn test_create_tx_custom_fee_rate() {
     assert_fee_rate!(psbt, fee.unwrap_or(Amount::ZERO), FeeRate::from_sat_per_vb_unchecked(5), @add_signature);
 }
 
+#[test]
+fn test_legacy_create_tx_custom_fee_rate() {
+    let (mut wallet, _) = get_funded_wallet_single(get_test_pkh());
+    let addr = wallet.next_unused_address(KeychainKind::External);
+    let mut builder = wallet.build_tx();
+    builder
+        .add_recipient(addr.script_pubkey(), Amount::from_sat(25_000))
+        .fee_rate(FeeRate::from_sat_per_vb_unchecked(5));
+    let psbt = builder.finish().unwrap();
+    let fee = check_fee!(wallet, psbt);
+
+    assert_fee_rate_legacy!(psbt, fee.unwrap_or(Amount::ZERO), FeeRate::from_sat_per_vb_unchecked(5), @add_signature);
+}
+
 #[test]
 fn test_create_tx_absolute_fee() {
     let (mut wallet, _) = get_funded_wallet_wpkh();