fix(data-process): 发布精确三路数据切分

backend/tests/test_data_process_algorithms.py

@@ -35,6 +35,7 @@ from app.modules.data_process.algorithms import (
     remove_document_noise,
     score_quality,
     stable_split,
+    stable_split_assignments,
 )
 
 
@@ -859,6 +860,17 @@ def test_stable_split_is_reproducible_and_validates_ratios() -> None:
         stable_split("record", {"train": 80, "validation": 10, "test": 9})
 
 
+def test_stable_split_assignments_use_exact_deterministic_quotas() -> None:
+    values = [f"record-{index}" for index in range(28)]
+    first = stable_split_assignments(values, seed="task-1")
+    second = stable_split_assignments(values, seed="task-1")
+
+    assert first == second
+    assert first.count("train") == 22
+    assert first.count("validation") == 3
+    assert first.count("test") == 3
+
+
 def test_generate_standard_records_supports_json_qa_and_stable_variants() -> None:
     previews = [
         {