Add test for in-order trades

1 files changed, 10 insertions, 0 deletions

diff --git a/test_trade_queue.py b/test_trade_queue.py
index f43487d..032f864 100644
--- a/test_trade_queue.py
+++ b/test_trade_queue.py
@@ -142,6 +142,16 @@ class TestFIFOQueueRemove(unittest.TestCase):
         self.fifo_queue.add(Decimal("10"), Decimal("100"), "2025-04-18")
         # Duplicate date for testing
 
+    def test_add_in_order(self):
+        """
+        Test whether trades are ordered by date.
+        """
+        self.fifo_queue.add(Decimal("10"), Decimal("100"), "2025-04-01")
+        lt = self.fifo_queue.get_copy()
+        self.assertTrue(
+            all(lt[i].date <= lt[i+1].date for i in range(len(lt) - 1))
+        )
+
     def test_remove_successful(self):
         """
         Test removing a trade successfully using a matching predicate.