From d2dfdb999528d57d9b14f88b7c68d11ceb980e45 Mon Sep 17 00:00:00 2001
From: Satchmo <rohenaz@gmail.com>
Date: Tue, 10 Sep 2024 09:28:08 -0400
Subject: [PATCH] add tests for signunsigned

---
 transaction/transaction_test.go | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/transaction/transaction_test.go b/transaction/transaction_test.go
index 90c2c81..c7debac 100644
--- a/transaction/transaction_test.go
+++ b/transaction/transaction_test.go
@@ -101,3 +101,30 @@ func TestUncomputedFee(t *testing.T) {
 	err := tx.Sign()
 	require.Error(t, err)
 }
+
+func TestSignUnsigned(t *testing.T) {
+	tx, err := transaction.NewTransactionFromBEEFHex(BRC62Hex)
+	require.NoError(t, err)
+
+	cloneTx := tx.ShallowClone()
+	pk, _ := ec.NewPrivateKey()
+
+	// Adding a script template with random key so sigs will be different
+	for i := range tx.Inputs {
+		cloneTx.Inputs[i].UnlockingScriptTemplate, err = p2pkh.Unlock(pk, nil)
+		require.NoError(t, err)
+	}
+
+	// This should do nothing because the inputs from hex are already signed
+	err = cloneTx.SignUnsigned()
+	require.NoError(t, err)
+	for i := range cloneTx.Inputs {
+		require.Equal(t, tx.Inputs[i].UnlockingScript, cloneTx.Inputs[i].UnlockingScript)
+	}
+
+	// This should sign the inputs with the incorrect key which should change the sigs
+	cloneTx.Sign()
+	for i := range tx.Inputs {
+		require.NotEqual(t, tx.Inputs[i].UnlockingScript, cloneTx.Inputs[i].UnlockingScript)
+	}
+}