1 files changed, 67 insertions, 0 deletions
diff --git a/test_trade_queue.py b/test_trade_queue.py
new file mode 100644
index 0000000..958b830
--- /dev/null
+++ b/test_trade_queue.py
@@ -0,0 +1,67 @@
+import unittest
+from datetime import datetime
+
+from trade_queue import FIFOQueue
+
+class TestFIFOQueue(unittest.TestCase):
+    def setUp(self):
+        """
+        Set up a FIFOQueue instance and some test trades.
+        """
+        self.queue = FIFOQueue()
+        self.queue.add(10.0, 100.0, "2025-04-14")
+        self.queue.add(20.0, 200.0, "2025-04-15")
+        self.queue.add(30.0, 300.0, "2025-04-16")
+
+    def test_add(self):
+        """
+        Test adding trades to the queue.
+        """
+        self.assertEqual(len(self.queue.queue), 3)  # There should be 3 trades in the queue
+        self.assertEqual(self.queue.queue[0].amount, 10.0)  # Check the first trade's amount
+        self.assertEqual(self.queue.queue[1].date, "2025-04-15")  # Check the second trade's date
+
+    def test_remove_exact_amount(self):
+        """
+        Test removing an exact amount from the queue.
+        """
+        trades = self.queue.remove(10.0)
+        self.assertEqual(len(trades), 1)  # One trade should be returned
+        self.assertEqual(trades[0].amount, 10.0)  # Amount should match the request
+        self.assertEqual(len(self.queue.queue), 2)  # Two trades should remain in the queue
+
+    def test_remove_partial_trade(self):
+        """
+        Test removing an amount that partially consumes a trade.
+        """
+        trades = self.queue.remove(5.0)
+        self.assertEqual(len(trades), 1)  # One partial trade should be returned
+        self.assertEqual(trades[0].amount, 5.0)  # Amount should match the request
+        self.assertEqual(self.queue.queue[0].amount, 5.0)  # Remaining trade amount should update
+
+    def test_remove_multiple_trades(self):
+        """
+        Test removing an amount that spans multiple trades.
+        """
+        trades = self.queue.remove(25.0)
+        self.assertEqual(len(trades), 2)  # Two trades should be returned
+        self.assertEqual(trades[0].amount, 10.0)  # The first trade should be fully consumed
+        self.assertEqual(trades[1].amount, 15.0)  # The second trade should be partially consumed
+        self.assertEqual(self.queue.queue[0].amount, 5.0)  # Remaining trade in queue should update
+
+    def test_remove_insufficient_amount(self):
+        """
+        Test trying to remove more than is available in the queue.
+        """
+        with self.assertRaises(ValueError):
+            self.queue.remove(100.0)  # This should raise an exception
+
+    def test_remove_negative_amount(self):
+        """
+        Test trying to remove a negative amount.
+        """
+        with self.assertRaises(ValueError):
+            self.queue.remove(-5.0)  # This should raise an exception
+
+if __name__ == "__main__":
+    unittest.main()