Add `OutPoint::fake()` helper.

Signed-off-by: Daira-Emma Hopwood <daira@jacaranda.org>

zcash_client_sqlite/src/testing/pool.rs

@@ -1206,7 +1206,7 @@ pub(crate) fn shield_transparent<T: ShieldedPoolTester>() {
     st.scan_cached_blocks(h, 1);
 
     let utxo = WalletTransparentOutput::from_parts(
-        OutPoint::new([1u8; 32], 1),
+        OutPoint::fake(),
         TxOut {
             value: NonNegativeAmount::const_from_u64(10000),
             script_pubkey: taddr.script(),

zcash_client_sqlite/src/wallet.rs

@@ -2919,7 +2919,7 @@ mod tests {
 
         // Create a fake transparent output.
         let value = NonNegativeAmount::const_from_u64(100000);
-        let outpoint = OutPoint::new([1u8; 32], 1);
+        let outpoint = OutPoint::fake();
         let txout = TxOut {
             value,
             script_pubkey: taddr.script(),
@@ -3098,7 +3098,6 @@ mod tests {
 
         // Create a fake transparent output.
         let value = NonNegativeAmount::from_u64(100000).unwrap();
-        let outpoint = OutPoint::new([1u8; 32], 1);
         let txout = TxOut {
             value,
             script_pubkey: taddr.script(),
@@ -3106,7 +3105,7 @@ mod tests {
 
         // Pretend the output was received in the chain tip.
         let height = st.wallet().chain_height().unwrap().unwrap();
-        let utxo = WalletTransparentOutput::from_parts(outpoint, txout, height).unwrap();
+        let utxo = WalletTransparentOutput::from_parts(OutPoint::fake(), txout, height).unwrap();
         st.wallet_mut()
             .put_received_transparent_utxo(&utxo)
             .unwrap();

zcash_client_sqlite/src/wallet/init/migrations/add_transaction_views.rs

@@ -420,7 +420,7 @@ mod tests {
             BlockHeight::from(3),
             Some(transparent::Bundle {
                 vin: vec![TxIn {
-                    prevout: OutPoint::new([1u8; 32], 1),
+                    prevout: OutPoint::fake(),
                     script_sig: Script(vec![]),
                     sequence: 0,
                 }],

zcash_primitives/src/transaction/components/transparent.rs

@@ -100,6 +100,15 @@ impl OutPoint {
         OutPoint { hash, n }
     }
 
+    /// Constructs a fake `OutPoint` for use in tests.
+    #[cfg(any(test, feature = "test-dependencies"))]
+    pub const fn fake() -> Self {
+        OutPoint {
+            hash: [1u8; 32],
+            n: 1,
+        }
+    }
+
     pub fn read<R: Read>(mut reader: R) -> io::Result<Self> {
         let mut hash = [0u8; 32];
         reader.read_exact(&mut hash)?;