DevSwarm

All runs / 8965aca4d20f

page_count drops the last partial page

Done

/home/devdi/devswarm/evals/tasks/off_by_one_pagination/repo · 2026-11-09 16:19:35 UTC · took 21.8s

  1. Plan (done)
  2. Code (done)
  3. Test (done)
  4. Review (done)
  5. Finish (done)
Cost
$0.0020
Tests
Passed
Iterations
1
Re-plans
0
LLM calls
9
Prompt read from cache
84%

Usage by agent

Cost per agent
planner: $0.0005 planner planner, Cost: $0.0005 $0.0005 coder: $0.0006 coder coder, Cost: $0.0006 $0.0006 tester: $0.0009 tester tester, Cost: $0.0009 $0.0009
Tokens per agent
  • Cache read
  • Cache write
  • Input
  • Output
planner: 6,927 planner planner, Cache read: 5,568 planner, Cache write: 696 planner, Output: 655 6,927 coder: 10.5K coder coder, Cache read: 8,248 coder, Cache write: 1,490 coder, Output: 728 10.5K tester: 12.8K tester tester, Cache read: 9,526 tester, Cache write: 2,279 tester, Output: 992 12.8K
View as table
AgentCostCache readCache writeInputOutput
planner$0.00055,5686968655
coder$0.00068,2481,4908728
tester$0.00099,5262,2798992

Timeline

  1. planner iteration 1 Finished 3 calls · 6,927 tokens · $0.0005 · 6.3s

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  2. coder iteration 1 Finished 3 calls · 10.5K tokens · $0.0006 · 7.1s

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  3. tester iteration 1 Finished 3 calls · 12.8K tokens · $0.0009 · 7.1s

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  4. verify iteration 1 Passed 0.6s 
    ......                                                                   [100%]
6 passed in 0.03s

Final diff

diff --git a/pager.py b/pager.py
index 4ec10a5..cca3998 100644
--- a/pager.py
+++ b/pager.py
@@ -1,5 +1,5 @@
 def page_count(total: int, size: int) -> int:
-    return total // size
+    return (total + size - 1) // size
 
 
 def get_page(items: list, page: int, size: int) -> list:
diff --git a/test_pager.py b/test_pager.py
index 3c51988..37824bb 100644
--- a/test_pager.py
+++ b/test_pager.py
@@ -5,5 +5,26 @@ def test_even_division():
     assert page_count(10, 5) == 2
 
 
+def test_partial_last_page():
+    assert page_count(11, 5) == 3
+
+
+def test_single_item():
+    assert page_count(1, 5) == 1
+
+
+def test_no_items():
+    assert page_count(0, 5) == 0
+
+
+def test_boundary_cases():
+    assert page_count(5, 5) == 1
+    assert page_count(6, 5) == 2
+    assert page_count(6, 3) == 2
+    assert page_count(7, 3) == 3
+    assert page_count(3, 1) == 3
+    assert page_count(1, 1) == 1
+
+
 def test_first_page():
     assert get_page([1, 2, 3, 4], 1, 2) == [1, 2]