feat: 试用过程中的细节优化

server/tests/test_generator_sizes.py

@@ -0,0 +1,22 @@
+"""平台目标比例到供应商尺寸参数的映射。"""
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+
+SERVER_DIR = Path(__file__).resolve().parents[1]
+if str(SERVER_DIR) not in sys.path:
+    sys.path.insert(0, str(SERVER_DIR))
+
+from services.generator import _image_size
+
+
+class ImageSizeTests(unittest.TestCase):
+    def test_pcore_ozon_size_is_exactly_three_to_four(self) -> None:
+        width, height = map(int, _image_size("pcore", "3:4").split("x"))
+        self.assertEqual(width * 4, height * 3)
+
+
+if __name__ == "__main__":
+    unittest.main()