Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/internal/config/image_storage_env_test.go

@@ -0,0 +1,41 @@
+//go:build unit
+
+package config
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// TestLoadImageStorageFromEnv guards against a viper trap that silently disabled
+// asynchronous image tasks for every environment-variable-only deployment.
+//
+// viper only decodes keys returned by AllKeys(), which unions SetDefault keys,
+// config-file keys and explicit BindEnv keys. AutomaticEnv can override a key
+// that is already in that list, but it never introduces a new one. Credentials
+// such as image_storage.bucket therefore need an (empty) default registered, or
+// IMAGE_STORAGE_BUCKET is dropped on the floor and Active() stays false while
+// image_storage.enabled reads true — the endpoints 404 with no useful signal.
+func TestLoadImageStorageFromEnv(t *testing.T) {
+	resetViperWithJWTSecret(t)
+	t.Setenv("IMAGE_STORAGE_ENABLED", "true")
+	t.Setenv("IMAGE_STORAGE_ENDPOINT", "https://acct.r2.cloudflarestorage.com")
+	t.Setenv("IMAGE_STORAGE_BUCKET", "my-images")
+	t.Setenv("IMAGE_STORAGE_ACCESS_KEY_ID", "ak")
+	t.Setenv("IMAGE_STORAGE_SECRET_ACCESS_KEY", "sk")
+	t.Setenv("IMAGE_STORAGE_PUBLIC_BASE_URL", "https://cdn.example.com")
+
+	cfg, err := Load()
+	require.NoError(t, err)
+
+	require.True(t, cfg.ImageStorage.Enabled)
+	require.Equal(t, "https://acct.r2.cloudflarestorage.com", cfg.ImageStorage.Endpoint)
+	require.Equal(t, "my-images", cfg.ImageStorage.Bucket)
+	require.Equal(t, "ak", cfg.ImageStorage.AccessKeyID)
+	require.Equal(t, "sk", cfg.ImageStorage.SecretAccessKey)
+	require.Equal(t, "https://cdn.example.com", cfg.ImageStorage.PublicBaseURL)
+
+	require.True(t, cfg.ImageStorage.IsConfigured())
+	require.True(t, cfg.ImageStorage.Active(), "async image tasks must be active when every credential is supplied via env")
+}