From add7da268f692328c67fe78761767f91bc7593cf Mon Sep 17 00:00:00 2001
From: chenyu <chenyu@fastmail.com>
Date: Wed, 14 Jan 2026 21:08:03 -0500
Subject: [PATCH] multiple slice assign test (#14157)

GANing test cases
---
 test/test_assign.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/test/test_assign.py b/test/test_assign.py
index fa43ec67f5..0d7c0df71c 100644
--- a/test/test_assign.py
+++ b/test/test_assign.py
@@ -644,5 +644,19 @@ class TestAssignOrdering(unittest.TestCase):
     self.assertEqual(row0_sum.item(), 4)
     self.assertEqual(row1_sum.item(), 8)
 
+  def test_multiple_slice_assigns_then_read(self):
+    """Multiple non-overlapping slice assigns then read - RAW dependencies must ensure all writes complete before read."""
+    buf = Tensor.zeros(4).contiguous().realize()
+    buf[0:1].assign(Tensor.ones(1))
+    buf[1:2].assign(Tensor.full((1,), 2.0))
+    buf[2:3].assign(Tensor.full((1,), 3.0))
+    self.assertEqual(buf.sum().realize().item(), 0.0)  # TODO: wrong! should be 1 + 2 + 3 + 0 = 6
+
+    buf = Tensor.zeros(4).contiguous().realize()
+    buf[0:1].assign(Tensor.ones(1)).realize()
+    buf[1:2].assign(Tensor.full((1,), 2.0)).realize()
+    buf[2:3].assign(Tensor.full((1,), 3.0)).realize()
+    self.assertEqual(buf.sum().realize().item(), 6.0)
+
 if __name__ == "__main__":
   unittest.main()