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

backend/internal/service/admin_group_platform_cache_test.go

@@ -0,0 +1,87 @@
+//go:build unit
+
+package service
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// groupPlatformRepoStub 只实现 UpdateGroup 走到的两个方法，其余靠内嵌接口占位。
+type groupPlatformRepoStub struct {
+	GroupRepository
+	group   *Group
+	updated *Group
+}
+
+func (r *groupPlatformRepoStub) GetByID(_ context.Context, _ int64) (*Group, error) {
+	cloned := *r.group
+	return &cloned, nil
+}
+
+func (r *groupPlatformRepoStub) Update(_ context.Context, group *Group) error {
+	r.updated = group
+	return nil
+}
+
+type channelCacheInvalidatorSpy struct {
+	calls int
+}
+
+func (s *channelCacheInvalidatorSpy) InvalidateCache() { s.calls++ }
+
+// 渠道缓存持有 groupID → platform，而渠道定价/模型映射/模型白名单都按平台严格隔离。
+// 改了分组平台却不失效缓存，最长 10 分钟内这些查找仍按旧平台匹配（静默走错价）。
+func TestUpdateGroupInvalidatesChannelCacheOnPlatformChange(t *testing.T) {
+	tests := []struct {
+		name          string
+		fromPlatform  string
+		inputPlatform string
+		wantCalls     int
+	}{
+		{
+			name:          "platform changed invalidates",
+			fromPlatform:  PlatformAnthropic,
+			inputPlatform: PlatformOpenAI,
+			wantCalls:     1,
+		},
+		{
+			name:          "same platform does not invalidate",
+			fromPlatform:  PlatformAnthropic,
+			inputPlatform: PlatformAnthropic,
+			wantCalls:     0,
+		},
+		{
+			// 请求里不带 platform 字段时不应该动缓存
+			name:          "platform omitted does not invalidate",
+			fromPlatform:  PlatformAnthropic,
+			inputPlatform: "",
+			wantCalls:     0,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			repo := &groupPlatformRepoStub{group: &Group{ID: 7, Name: "g", Platform: tt.fromPlatform}}
+			spy := &channelCacheInvalidatorSpy{}
+			svc := &adminServiceImpl{groupRepo: repo, channelCacheInvalidator: spy}
+
+			got, err := svc.UpdateGroup(context.Background(), 7, &UpdateGroupInput{Platform: tt.inputPlatform})
+			require.NoError(t, err)
+			require.NotNil(t, got)
+			require.Equal(t, tt.wantCalls, spy.calls)
+		})
+	}
+}
+
+// 依赖可以不注入（例如测试或裁剪构建），此时不应 panic——缓存靠 TTL 自然重建。
+func TestUpdateGroupWithoutChannelCacheInvalidator(t *testing.T) {
+	repo := &groupPlatformRepoStub{group: &Group{ID: 7, Name: "g", Platform: PlatformAnthropic}}
+	svc := &adminServiceImpl{groupRepo: repo}
+
+	got, err := svc.UpdateGroup(context.Background(), 7, &UpdateGroupInput{Platform: PlatformOpenAI})
+	require.NoError(t, err)
+	require.Equal(t, PlatformOpenAI, got.Platform)
+}