mirror of
https://gitcode.com/JianFeeeee/ModelRouter.git
synced 2026-11-07 09:47:23 +00:00
test(retry): 钉住声明式重试判据与流式握手重试语义
- config：ShouldRetry/DelayDuration 表驱动（nil/次数=1/状态不匹配/body 不匹配/ 空子串/多信号/非法间隔） - provider：命中策略就重试直到 200、body 不匹配**不许**重试（400 也常用于真错误）、 流式只重试握手（首帧之后不重试，避免重复输出）
This commit is contained in:
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59
internal/config/retry_policy_test.go
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59
internal/config/retry_policy_test.go
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package config
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import (
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"testing"
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"time"
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)
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// ShouldRetry 是纯数据判据：状态码列表 + 响应体子串。它决定"这次失败值不值得
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// 在网关内部等一会儿重试"。厂商知识绝不能进内核，所以判据必须能用一个表格测清楚。
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func TestRetryPolicyShouldRetry(t *testing.T) {
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cases := []struct {
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name string
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policy *RetryPolicy
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status int
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body string
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want bool
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}{
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{"nil policy", nil, 500, "anything", false},
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{"max_attempts=1 disables", &RetryPolicy{OnStatus: []int{400}, MaxAttempts: 1}, 400, "x", false},
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{"status matches, no body filter",
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&RetryPolicy{OnStatus: []int{429}, MaxAttempts: 3}, 429, "", true},
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{"status mismatch",
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&RetryPolicy{OnStatus: []int{429}, MaxAttempts: 3}, 400, "429", false},
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{"status + body match",
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&RetryPolicy{OnStatus: []int{400}, OnBodyContains: []string{"TM.00001041"}, MaxAttempts: 3},
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400, `{"error_code":"TM.00001041"}`, true},
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{"status matches but body does not",
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&RetryPolicy{OnStatus: []int{400}, OnBodyContains: []string{"TM.00001041"}, MaxAttempts: 3},
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400, `{"error_code":"TM.00001005"}`, false},
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{"empty substring never matches",
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&RetryPolicy{OnStatus: []int{400}, OnBodyContains: []string{""}, MaxAttempts: 3}, 400, "x", false},
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{"any of several body signals",
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&RetryPolicy{OnStatus: []int{400, 429}, OnBodyContains: []string{"TM.00001041", "TPM limit"}, MaxAttempts: 3},
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429, `{"message":"TPM limit exceeded"}`, true},
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}
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for _, tc := range cases {
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if got := tc.policy.ShouldRetry(tc.status, tc.body); got != tc.want {
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t.Errorf("%s: ShouldRetry(%d, %q) = %v, want %v", tc.name, tc.status, tc.body, got, tc.want)
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}
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}
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}
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func TestRetryPolicyDelay(t *testing.T) {
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cases := []struct {
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name string
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policy *RetryPolicy
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want time.Duration
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}{
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{"nil", nil, 10 * time.Second},
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{"explicit", &RetryPolicy{Delay: "250ms"}, 250 * time.Millisecond},
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{"garbage falls back", &RetryPolicy{Delay: "not-a-duration"}, 10 * time.Second},
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{"negative falls back", &RetryPolicy{Delay: "-5s"}, 10 * time.Second},
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}
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for _, tc := range cases {
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if got := tc.policy.DelayDuration(); got != tc.want {
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t.Errorf("%s: DelayDuration() = %v, want %v", tc.name, got, tc.want)
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}
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}
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}
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131
internal/provider/retry_policy_test.go
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131
internal/provider/retry_policy_test.go
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package provider
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import (
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"context"
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"fmt"
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"net/http"
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"net/http/httptest"
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"sync/atomic"
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"testing"
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"llmsproxy/internal/config"
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"llmsproxy/internal/types"
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)
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// 上游重试是**内核的通用机制**，判据纯数据（status + body 子串），
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// 目的是让"账号级限流、等一会儿就好"这类拒绝不冒到客户端。
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//
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// 真实事故（2026-10-20）：CodeArts 账户并发会话上限 3 个，连续第 3~4 个请求
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// 回 400 TM.00001041，最后一个请求结束后约 44~60 秒才释放；流式更糟 ——
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// 上游用 HTTP 200 + error 帧表达拒绝，内核只能报 `empty stream`。
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// 参考实现的处理是每 10s 重试一次 chat 直到放行，本测试钉住同一语义。
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func TestChatRetriesDeclaredUpstreamRejection(t *testing.T) {
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var hits int32
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up := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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n := atomic.AddInt32(&hits, 1)
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if n <= 2 {
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w.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(w, `{"error_code":"TM.00001041","error_msg":"并发会话数已达上限(3个)"}`)
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return
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}
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fmt.Fprint(w, `{"choices":[{"message":{"content":"hi"},"finish_reason":"stop"}]}`)
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}))
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defer up.Close()
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s := src("codearts-like", up.URL, "openai", "m1")
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s.Retry = &config.RetryPolicy{
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OnStatus: []int{400},
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OnBodyContains: []string{"TM.00001041"},
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Delay: "1ms",
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MaxAttempts: 4,
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}
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p := newTestProvider(t, s)
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resp, err := p.Chat(context.Background(), &types.ChatRequest{
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Model: "m1",
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Messages: []types.ChatMessage{{Role: "user", Content: types.StringContent("hi")}},
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})
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if err != nil {
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t.Fatalf("命中重试策略后应成功，实得错误: %v", err)
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}
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if resp.Content != "hi" {
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t.Fatalf("content = %q", resp.Content)
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}
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if got := atomic.LoadInt32(&hits); got != 3 {
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t.Fatalf("应恰好尝试 3 次（2 次失败 + 1 次成功），实得 %d", got)
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}
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}
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// 同一状态码但 body 不匹配 ⇒ **不许重试**（400 也常用于真正的请求错误，
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// 无差别重试只会把错误延迟 3 分钟才暴露给用户）。
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func TestChatDoesNotRetryUnmatchedBody(t *testing.T) {
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var hits int32
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up := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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atomic.AddInt32(&hits, 1)
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w.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(w, `{"error_code":"TM.00001005","error_msg":"无正常可用套餐"}`)
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}))
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defer up.Close()
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s := src("codearts-like", up.URL, "openai", "m1")
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s.Retry = &config.RetryPolicy{
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OnStatus: []int{400},
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OnBodyContains: []string{"TM.00001041"},
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Delay: "1ms",
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MaxAttempts: 5,
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}
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p := newTestProvider(t, s)
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_, err := p.Chat(context.Background(), &types.ChatRequest{
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Model: "m1",
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Messages: []types.ChatMessage{{Role: "user", Content: types.StringContent("hi")}},
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})
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if err == nil {
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t.Fatal("不可重试的 body 必须失败")
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}
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if got := atomic.LoadInt32(&hits); got != 1 {
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t.Fatalf("body 不匹配时只能尝试 1 次，实得 %d", got)
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}
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}
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// 流式：只重试**握手**。命中策略 → 重试直到 200 才开始派发；一旦开始流式
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// 就不再重试（重复输出比报错更糟）。
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func TestChatStreamRetriesHandshakeOnly(t *testing.T) {
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var hits int32
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up := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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n := atomic.AddInt32(&hits, 1)
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if n == 1 {
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w.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(w, `{"error_code":"TM.00001041","error_msg":"并发会话数已达上限(3个)"}`)
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return
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}
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w.Header().Set("Content-Type", "text/event-stream")
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fmt.Fprint(w, "data: {\"choices\":[{\"delta\":{\"content\":\"hi\"},\"finish_reason\":\"stop\"}]}\n\n")
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fmt.Fprint(w, "data: [DONE]\n\n")
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}))
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defer up.Close()
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s := src("codearts-like", up.URL, "openai", "m1")
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s.Retry = &config.RetryPolicy{
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OnStatus: []int{400},
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OnBodyContains: []string{"TM.00001041"},
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Delay: "1ms",
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MaxAttempts: 4,
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}
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p := newTestProvider(t, s)
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ch, err := p.ChatStream(context.Background(), &types.ChatRequest{
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Model: "m1",
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Messages: []types.ChatMessage{{Role: "user", Content: types.StringContent("hi")}},
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})
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if err != nil {
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t.Fatalf("握手重试后应成功: %v", err)
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}
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var content string
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for ck := range ch {
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content += ck.Content
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}
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if content != "hi" {
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t.Fatalf("content = %q", content)
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}
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if got := atomic.LoadInt32(&hits); got != 2 {
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t.Fatalf("应握手重试 1 次（共 2 次请求），实得 %d", got)
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}
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}
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