chore: update gitignore; feat: 新增customer_agent业务模块与api路由

tests/test_chunk_config.py

@@ -0,0 +1,29 @@
+import unittest
+
+from rag.chunk_config import DEFAULT_CHUNK_OVERLAP, DEFAULT_CHUNK_SIZE, resolve_chunk_config
+
+
+class ChunkConfigTests(unittest.TestCase):
+    def test_uses_project_defaults_without_sys_config(self):
+        config = resolve_chunk_config()
+
+        self.assertEqual(config.size, DEFAULT_CHUNK_SIZE)
+        self.assertEqual(config.overlap, DEFAULT_CHUNK_OVERLAP)
+        self.assertEqual((config.size, config.overlap), (512, 64))
+
+    def test_custom_values_override_defaults_independently(self):
+        config = resolve_chunk_config(chunk_size=256)
+
+        self.assertEqual((config.size, config.overlap), (256, 64))
+
+    def test_rejects_invalid_chunk_values(self):
+        with self.assertRaises(ValueError):
+            resolve_chunk_config(chunk_size=0)
+        with self.assertRaises(ValueError):
+            resolve_chunk_config(chunk_size=64, chunk_overlap=64)
+        with self.assertRaises(ValueError):
+            resolve_chunk_config(chunk_overlap=-1)
+
+
+if __name__ == "__main__":
+    unittest.main()