ModelTranslator: 减面 ratio/容差纯逻辑（TDD）

2026-07-16 10:36:01 +08:00
parent da935926c7
commit 8ede09f859
2 changed files with 64 additions and 0 deletions
@@ -0,0 +1,40 @@
+import os
+import sys
+import unittest
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+import bl_decimate as bd
+
+
+class TestDecimateRatio(unittest.TestCase):
+    def test_normal_reduction(self):
+        self.assertAlmostEqual(bd.decimate_ratio(5000, 1500000), 5000 / 1500000.0)
+
+    def test_current_below_target_returns_one(self):
+        self.assertEqual(bd.decimate_ratio(5000, 3000), 1.0)
+
+    def test_current_equal_target_returns_one(self):
+        self.assertEqual(bd.decimate_ratio(5000, 5000), 1.0)
+
+    def test_zero_current_returns_one(self):
+        self.assertEqual(bd.decimate_ratio(5000, 0), 1.0)
+
+
+class TestWithinTolerance(unittest.TestCase):
+    def test_exact_hit(self):
+        self.assertTrue(bd.within_tolerance(5000, 5000))
+
+    def test_within_3_percent(self):
+        self.assertTrue(bd.within_tolerance(5000, 5150))   # +3%
+        self.assertTrue(bd.within_tolerance(5000, 4850))   # -3%
+
+    def test_outside_3_percent(self):
+        self.assertFalse(bd.within_tolerance(5000, 5200))
+        self.assertFalse(bd.within_tolerance(5000, 4700))
+
+    def test_zero_target_is_false(self):
+        self.assertFalse(bd.within_tolerance(0, 0))
+
+
+if __name__ == "__main__":
+    unittest.main()