fixes

tests/test_llm.py

@@ -1,5 +1,11 @@
 from evanescere.schemas import ClipCandidate
-from evanescere.services.llm import dedupe_and_rank_candidates, parse_clip_response
+from evanescere.services.llm import (
+    TranscriptChunk,
+    candidate_quota_per_chunk,
+    dedupe_and_rank_candidates,
+    parse_clip_response,
+    render_user_prompt,
+)
 
 
 def test_parse_clip_response():
@@ -62,3 +68,55 @@ def test_dedupe_and_rank_candidates_filters_short_and_overlapping():
     ranked = dedupe_and_rank_candidates(candidates)
     assert [candidate.title_zh for candidate in ranked] == ["best", "second"]
 
+
+def test_candidate_quota_uses_total_budget_across_chunks():
+    assert candidate_quota_per_chunk(1, 20) == 20
+    assert candidate_quota_per_chunk(4, 20) == 5
+    assert candidate_quota_per_chunk(0, 20) == 0
+
+
+def test_dedupe_respects_configured_duration_and_total_cap():
+    candidates = [
+        ClipCandidate(
+            start_sec=index * 240,
+            end_sec=index * 240 + duration,
+            title_zh=f"clip-{index}",
+            summary_zh="",
+            reason="",
+            score=1 - index / 100,
+        )
+        for index, duration in enumerate([60, 180, 181, 90])
+    ]
+    ranked = dedupe_and_rank_candidates(
+        candidates,
+        min_clip_seconds=30,
+        max_clip_seconds=180,
+        max_candidates_total=2,
+    )
+    assert [candidate.title_zh for candidate in ranked] == ["clip-0", "clip-1"]
+
+
+def test_render_user_prompt_inserts_configured_values():
+    prompt = render_user_prompt(
+        "{max_candidates}|{min_clip_seconds}|{max_clip_seconds}|{chunk_start_sec}|{chunk_end_sec}|{transcript}",
+        chunk=TranscriptChunk(12.25, 42.75, "hello"),
+        max_candidates=20,
+        min_clip_seconds=30,
+        max_clip_seconds=180,
+    )
+    assert prompt == "20|30|180|12.2|42.8|hello"
+
+
+def test_render_user_prompt_rejects_unknown_placeholder():
+    try:
+        render_user_prompt(
+            "{unknown}",
+            chunk=TranscriptChunk(0, 1, "hello"),
+            max_candidates=20,
+            min_clip_seconds=30,
+            max_clip_seconds=180,
+        )
+    except ValueError as exc:
+        assert "Unknown placeholder" in str(exc)
+    else:
+        raise AssertionError("Expected unknown placeholder to fail")