v1: executing-plans 模式生成，54 文件 1320 行 Python

tests/comparator/test_rounding.py

@@ -0,0 +1,24 @@
+import sys, os
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..")))
+from comparator.rounding_detect import detect_rounding, RoundingResult
+
+
+def test_truncation_detected():
+    r = detect_rounding("1500000", "1499999")
+    assert r.mode in ("TRUNCATE", "HALF_UP")
+
+
+def test_exact_match():
+    r = detect_rounding("1500000", "1500000")
+    assert r.mode == "EXACT"
+    assert r.confidence == 1.0
+
+
+def test_low_confidence_small_diff():
+    r = detect_rounding("1500", "1498")
+    assert r.confidence < 1.0
+
+
+def test_suggestion_generated():
+    r = detect_rounding("1500000", "1499999")
+    assert len(r.suggestion) > 0