初始化

API/internal/storage/cos_test.go

@@ -0,0 +1,14 @@
+// Package storage 验证腾讯云 COS 对象键扩展名处理规则。
+package storage
+
+import "testing"
+
+// TestKeyWithContentTypeMatchesActualMedia 验证远端媒体类型会覆盖错误扩展名。
+func TestKeyWithContentTypeMatchesActualMedia(t *testing.T) {
+	if got := keyWithContentType("folder/result.png", "image/webp"); got != "folder/result.webp" {
+		t.Fatalf("got %s", got)
+	}
+	if got := keyWithContentType("folder/result.mp4", "video/quicktime"); got != "folder/result.mov" {
+		t.Fatalf("got %s", got)
+	}
+}