Added test to verify the iteration over owned transactions (#1041)

Added test to cover the iteration over owned transactions.

Ref FuelLabs/fuel-core#1040

tests/tests/tx.rs

@@ -386,6 +386,101 @@ async fn get_transactions() {
     assert!(response.has_previous_page);
 }
 
+#[tokio::test]
+async fn get_transactions_by_owner_forward_and_backward_iterations() {
+    let alice = Address::from([1; 32]);
+    let bob = Address::from([2; 32]);
+
+    let mut context = TestContext::new(100).await;
+    let _ = context.transfer(alice, bob, 1).await.unwrap();
+    let _ = context.transfer(alice, bob, 2).await.unwrap();
+    let _ = context.transfer(alice, bob, 3).await.unwrap();
+    let _ = context.transfer(alice, bob, 4).await.unwrap();
+    let _ = context.transfer(alice, bob, 5).await.unwrap();
+
+    let client = context.client;
+
+    let all_transactions_forward = PaginationRequest {
+        cursor: None,
+        results: 10,
+        direction: PageDirection::Forward,
+    };
+    let response = client
+        .transactions_by_owner(bob.to_string().as_str(), all_transactions_forward)
+        .await
+        .unwrap();
+    let transactions_forward = response
+        .results
+        .into_iter()
+        .map(|tx| {
+            assert!(matches!(tx.status, TransactionStatus::Success { .. }));
+            tx.transaction
+        })
+        .collect_vec();
+    assert_eq!(transactions_forward.len(), 5);
+
+    let all_transactions_backward = PaginationRequest {
+        cursor: None,
+        results: 10,
+        direction: PageDirection::Backward,
+    };
+    let response = client
+        .transactions_by_owner(bob.to_string().as_str(), all_transactions_backward)
+        .await;
+    // Backward request is not supported right now.
+    assert!(response.is_err());
+
+    ///////////////// Iteration
+
+    let forward_iter_three = PaginationRequest {
+        cursor: None,
+        results: 3,
+        direction: PageDirection::Forward,
+    };
+    let response_after_iter_three = client
+        .transactions_by_owner(bob.to_string().as_str(), forward_iter_three)
+        .await
+        .unwrap();
+    let transactions_forward_iter_three = response_after_iter_three
+        .results
+        .into_iter()
+        .map(|tx| {
+            assert!(matches!(tx.status, TransactionStatus::Success { .. }));
+            tx.transaction
+        })
+        .collect_vec();
+    assert_eq!(transactions_forward_iter_three.len(), 3);
+    assert_eq!(transactions_forward_iter_three[0], transactions_forward[0]);
+    assert_eq!(transactions_forward_iter_three[1], transactions_forward[1]);
+    assert_eq!(transactions_forward_iter_three[2], transactions_forward[2]);
+
+    let forward_iter_next_two = PaginationRequest {
+        cursor: response_after_iter_three.cursor.clone(),
+        results: 2,
+        direction: PageDirection::Forward,
+    };
+    let response = client
+        .transactions_by_owner(bob.to_string().as_str(), forward_iter_next_two)
+        .await
+        .unwrap();
+    let transactions_forward_iter_next_two = response
+        .results
+        .into_iter()
+        .map(|tx| {
+            assert!(matches!(tx.status, TransactionStatus::Success { .. }));
+            tx.transaction
+        })
+        .collect_vec();
+    assert_eq!(
+        transactions_forward_iter_next_two[0],
+        transactions_forward[3]
+    );
+    assert_eq!(
+        transactions_forward_iter_next_two[1],
+        transactions_forward[4]
+    );
+}
+
 #[tokio::test]
 async fn get_transactions_from_manual_blocks() {
     let (executor, db) = get_executor_and_db();