test(starknet_mempool): impl test to verify get_txs returns txs sorte…

…d by secondary priority on tie (#2728)

Co-Authored-By: Mohammad Nassar <mohammad@starkware.co>

crates/starknet_mempool/src/mempool_test.rs

@@ -220,7 +220,7 @@ fn mempool() -> Mempool {
 #[case::test_get_exactly_all_eligible_txs(3)]
 #[case::test_get_more_than_all_eligible_txs(5)]
 #[case::test_get_less_than_all_eligible_txs(2)]
-fn test_get_txs_returns_by_priority_order(#[case] n_requested_txs: usize) {
+fn test_get_txs_returns_by_priority(#[case] n_requested_txs: usize) {
     // Setup.
     let tx_tip_20 = tx!(tx_hash: 1, address: "0x0", tip: 20);
     let tx_tip_30 = tx!(tx_hash: 2, address: "0x1", tip: 30);
@@ -248,6 +248,21 @@ fn test_get_txs_returns_by_priority_order(#[case] n_requested_txs: usize) {
     expected_mempool_content.assert_eq(&mempool);
 }
 
+#[rstest]
+fn test_get_txs_returns_by_secondary_priority_on_tie() {
+    // Setup.
+    let tx_tip_10_hash_9 = tx!(tx_hash: 9, address: "0x2", tip: 10);
+    let tx_tip_10_hash_15 = tx!(tx_hash: 15, address: "0x0", tip: 10);
+
+    let mut mempool = MempoolContentBuilder::new()
+        .with_pool([&tx_tip_10_hash_9, &tx_tip_10_hash_15].map(|tx| tx.clone()))
+        .with_priority_queue([&tx_tip_10_hash_9, &tx_tip_10_hash_15].map(TransactionReference::new))
+        .build_into_mempool();
+
+    // Test and assert.
+    get_txs_and_assert_expected(&mut mempool, 2, &[tx_tip_10_hash_15, tx_tip_10_hash_9]);
+}
+
 #[rstest]
 fn test_get_txs_does_not_return_pending_txs() {
     // Setup.