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feat(P1/P2): 完成TDD开发及P1/P2设计文档

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## 设计文档
- multi_role_permission_design: 多角色权限设计 (CONDITIONAL GO)
- audit_log_enhancement_design: 审计日志增强 (CONDITIONAL GO)
- routing_strategy_template_design: 路由策略模板 (CONDITIONAL GO)
- sso_saml_technical_research: SSO/SAML调研 (CONDITIONAL GO)
- compliance_capability_package_design: 合规能力包设计 (CONDITIONAL GO)

## TDD开发成果
- IAM模块: supply-api/internal/iam/ (111个测试)
- 审计日志模块: supply-api/internal/audit/ (40+测试)
- 路由策略模块: gateway/internal/router/ (33+测试)
- 合规能力包: gateway/internal/compliance/ + scripts/ci/compliance/

## 规范文档
- parallel_agent_output_quality_standards: 并行Agent产出质量规范
- project_experience_summary: 项目经验总结 (v2)
- 2026-04-02-p1-p2-tdd-execution-plan: TDD执行计划

## 评审报告
- 5个CONDITIONAL GO设计文档评审报告
- fix_verification_report: 修复验证报告
- full_verification_report: 全面质量验证报告
- tdd_module_quality_verification: TDD模块质量验证
- tdd_execution_summary: TDD执行总结

依据: Superpowers执行框架 + TDD规范
This commit is contained in:
Your Name
2026-04-02 23:35:53 +08:00
parent ed0961d486
commit 89104bd0db
94 changed files with 24738 additions and 5 deletions
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63
gateway/internal/router/engine/routing_engine.go Normal file
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package engine
import (
"context"
"errors"
"lijiaoqiao/gateway/internal/router/strategy"
)
// ErrStrategyNotFound 策略未找到
var ErrStrategyNotFound = errors.New("strategy not found")
// RoutingMetrics 路由指标接口
type RoutingMetrics interface {
// RecordSelection 记录路由选择
RecordSelection(provider string, strategyName string, decision *strategy.RoutingDecision)
}
// RoutingEngine 路由引擎
type RoutingEngine struct {
strategies map[string]strategy.StrategyTemplate
metrics RoutingMetrics
}
// NewRoutingEngine 创建路由引擎
func NewRoutingEngine() *RoutingEngine {
return &RoutingEngine{
strategies: make(map[string]strategy.StrategyTemplate),
metrics: nil,
}
}
// RegisterStrategy 注册路由策略
func (e *RoutingEngine) RegisterStrategy(name string, template strategy.StrategyTemplate) {
e.strategies[name] = template
}
// SetMetrics 设置指标收集器
func (e *RoutingEngine) SetMetrics(metrics RoutingMetrics) {
e.metrics = metrics
}
// SelectProvider 根据策略选择Provider
func (e *RoutingEngine) SelectProvider(ctx context.Context, req *strategy.RoutingRequest, strategyName string) (*strategy.RoutingDecision, error) {
// 查找策略
tpl, ok := e.strategies[strategyName]
if !ok {
return nil, ErrStrategyNotFound
}
// 执行策略选择
decision, err := tpl.SelectProvider(ctx, req)
if err != nil {
return nil, err
}
// 记录指标
if e.metrics != nil && decision != nil {
e.metrics.RecordSelection(decision.Provider, decision.Strategy, decision)
}
return decision, nil
}

154
gateway/internal/router/engine/routing_engine_test.go Normal file
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package engine
import (
"context"
"testing"
"github.com/stretchr/testify/assert"
"lijiaoqiao/gateway/internal/adapter"
"lijiaoqiao/gateway/internal/router/strategy"
)
// TestRoutingEngine_SelectProvider 测试路由引擎根据策略选择provider
func TestRoutingEngine_SelectProvider(t *testing.T) {
engine := NewRoutingEngine()
// 注册策略
costBased := strategy.NewCostBasedTemplate("CostBased", strategy.CostParams{
MaxCostPer1KTokens: 1.0,
})
// 注册providers
costBased.RegisterProvider("ProviderA", &MockProvider{
name: "ProviderA",
costPer1KTokens: 0.5,
available: true,
models: []string{"gpt-4"},
})
costBased.RegisterProvider("ProviderB", &MockProvider{
name: "ProviderB",
costPer1KTokens: 0.3, // 最低成本
available: true,
models: []string{"gpt-4"},
})
engine.RegisterStrategy("cost_based", costBased)
req := &strategy.RoutingRequest{
Model: "gpt-4",
UserID: "user123",
MaxCost: 1.0,
}
decision, err := engine.SelectProvider(context.Background(), req, "cost_based")
assert.NoError(t, err)
assert.NotNil(t, decision)
assert.Equal(t, "ProviderB", decision.Provider, "Should select lowest cost provider")
assert.True(t, decision.TakeoverMark, "TakeoverMark should be true for M-008")
}
// TestRoutingEngine_DecisionMetrics 测试路由决策记录metrics
func TestRoutingEngine_DecisionMetrics(t *testing.T) {
engine := NewRoutingEngine()
// 创建mock metrics collector
engine.metrics = &MockRoutingMetrics{}
// 注册策略
costBased := strategy.NewCostBasedTemplate("CostBased", strategy.CostParams{
MaxCostPer1KTokens: 1.0,
})
costBased.RegisterProvider("ProviderA", &MockProvider{
name: "ProviderA",
costPer1KTokens: 0.5,
available: true,
models: []string{"gpt-4"},
})
engine.RegisterStrategy("cost_based", costBased)
req := &strategy.RoutingRequest{
Model: "gpt-4",
UserID: "user123",
}
decision, err := engine.SelectProvider(context.Background(), req, "cost_based")
assert.NoError(t, err)
assert.NotNil(t, decision)
// 验证metrics被记录
metrics := engine.metrics.(*MockRoutingMetrics)
assert.True(t, metrics.recordCalled, "RecordSelection should be called")
assert.Equal(t, "ProviderA", metrics.lastProvider, "Provider should be recorded")
}
// MockProvider 用于测试的Mock Provider
type MockProvider struct {
name string
costPer1KTokens float64
qualityScore float64
latencyMs int64
available bool
models []string
}
func (m *MockProvider) ChatCompletion(ctx context.Context, model string, messages []adapter.Message, options adapter.CompletionOptions) (*adapter.CompletionResponse, error) {
return nil, nil
}
func (m *MockProvider) ChatCompletionStream(ctx context.Context, model string, messages []adapter.Message, options adapter.CompletionOptions) (<-chan *adapter.StreamChunk, error) {
return nil, nil
}
func (m *MockProvider) GetUsage(response *adapter.CompletionResponse) adapter.Usage {
return adapter.Usage{}
}
func (m *MockProvider) MapError(err error) adapter.ProviderError {
return adapter.ProviderError{}
}
func (m *MockProvider) HealthCheck(ctx context.Context) bool {
return m.available
}
func (m *MockProvider) ProviderName() string {
return m.name
}
func (m *MockProvider) SupportedModels() []string {
return m.models
}
func (m *MockProvider) GetCostPer1KTokens() float64 {
return m.costPer1KTokens
}
func (m *MockProvider) GetQualityScore() float64 {
return m.qualityScore
}
func (m *MockProvider) GetLatencyMs() int64 {
return m.latencyMs
}
// MockRoutingMetrics 用于测试的Mock Metrics
type MockRoutingMetrics struct {
recordCalled bool
lastProvider string
lastStrategy string
takeoverMark bool
}
func (m *MockRoutingMetrics) RecordSelection(provider string, strategyName string, decision *strategy.RoutingDecision) {
m.recordCalled = true
m.lastProvider = provider
m.lastStrategy = strategyName
if decision != nil {
m.takeoverMark = decision.TakeoverMark
}
}

145
gateway/internal/router/fallback/fallback.go Normal file
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package fallback
import (
"context"
"errors"
"lijiaoqiao/gateway/internal/adapter"
"lijiaoqiao/gateway/internal/router/strategy"
)
// ErrAllTiersFailed 所有Fallback层级都失败
var ErrAllTiersFailed = errors.New("all fallback tiers failed")
// ErrRateLimitExceeded 限流错误
var ErrRateLimitExceeded = errors.New("rate limit exceeded")
// FallbackHandler Fallback处理器
type FallbackHandler struct {
tiers []TierConfig
router FallbackRouter
metrics FallbackMetrics
providerGetter ProviderGetter
}
// TierConfig Fallback层级配置
type TierConfig struct {
Tier int
Providers []string
TimeoutMs int64
}
// FallbackMetrics Fallback指标接口
type FallbackMetrics interface {
RecordTakeoverMark(provider string, tier int)
}
// ProviderGetter Provider获取器接口
type ProviderGetter interface {
GetProvider(name string) adapter.ProviderAdapter
}
// FallbackRouter Fallback路由器接口
type FallbackRouter interface {
SelectProvider(ctx context.Context, req *strategy.RoutingRequest, providerName string) (*strategy.RoutingDecision, error)
}
// NewFallbackHandler 创建Fallback处理器
func NewFallbackHandler() *FallbackHandler {
return &FallbackHandler{
tiers: make([]TierConfig, 0),
}
}
// SetTiers 设置Fallback层级
func (h *FallbackHandler) SetTiers(tiers []TierConfig) {
h.tiers = tiers
}
// SetRouter 设置路由器
func (h *FallbackHandler) SetRouter(router FallbackRouter) {
h.router = router
}
// SetMetrics 设置指标收集器
func (h *FallbackHandler) SetMetrics(metrics FallbackMetrics) {
h.metrics = metrics
}
// SetProviderGetter 设置Provider获取器
func (h *FallbackHandler) SetProviderGetter(getter ProviderGetter) {
h.providerGetter = getter
}
// Handle 处理Fallback
func (h *FallbackHandler) Handle(ctx context.Context, req *strategy.RoutingRequest) (*strategy.RoutingDecision, error) {
if len(h.tiers) == 0 {
return nil, ErrAllTiersFailed
}
// 按层级顺序尝试
for _, tier := range h.tiers {
decision, err := h.tryTier(ctx, req, tier)
if err == nil {
// 成功，记录指标
if h.metrics != nil {
h.metrics.RecordTakeoverMark(decision.Provider, tier.Tier)
}
return decision, nil
}
// 检查是否是限流错误
if errors.Is(err, ErrRateLimitExceeded) {
// 限流错误立即返回，不继续降级
return nil, err
}
// 其他错误，尝试下一层级
continue
}
return nil, ErrAllTiersFailed
}
// tryTier 尝试单个层级
func (h *FallbackHandler) tryTier(ctx context.Context, req *strategy.RoutingRequest, tier TierConfig) (*strategy.RoutingDecision, error) {
for _, providerName := range tier.Providers {
decision, err := h.router.SelectProvider(ctx, req, providerName)
if err == nil {
decision.TakeoverMark = true
return decision, nil
}
// 检查是否是限流错误
if isRateLimitError(err) {
return nil, ErrRateLimitExceeded
}
// 其他错误，继续尝试下一个provider
continue
}
return nil, ErrAllTiersFailed
}
// isRateLimitError 判断是否是限流错误
func isRateLimitError(err error) bool {
if err == nil {
return false
}
// 检查错误消息中是否包含rate limit
return containsRateLimit(err.Error())
}
func containsRateLimit(s string) bool {
return len(s) > 0 && (contains(s, "rate limit") || contains(s, "ratelimit") || contains(s, "too many requests"))
}
func contains(s, substr string) bool {
for i := 0; i <= len(s)-len(substr); i++ {
if s[i:i+len(substr)] == substr {
return true
}
}
return false
}

192
gateway/internal/router/fallback/fallback_test.go Normal file
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package fallback
import (
"context"
"errors"
"testing"
"github.com/stretchr/testify/assert"
"lijiaoqiao/gateway/internal/router/strategy"
)
// TestFallback_Tier1_Success 测试Tier1可用时直接返回
func TestFallback_Tier1_Success(t *testing.T) {
fb := NewFallbackHandler()
// 设置Tier1 provider
fb.tiers = []TierConfig{
{
Tier: 1,
Providers: []string{"ProviderA"},
},
}
// 创建mock router
fb.router = &MockFallbackRouter{
providers: map[string]*MockFallbackProvider{
"ProviderA": {
name: "ProviderA",
available: true,
},
},
}
// 设置metrics
fb.metrics = &MockFallbackMetrics{}
req := &strategy.RoutingRequest{
Model: "gpt-4",
UserID: "user123",
}
decision, err := fb.Handle(context.Background(), req)
assert.NoError(t, err)
assert.NotNil(t, decision)
assert.Equal(t, "ProviderA", decision.Provider, "Should select Tier1 provider")
assert.True(t, decision.TakeoverMark, "TakeoverMark should be true")
}
// TestFallback_Tier1_Fail_Tier2 测试Tier1失败时降级到Tier2
func TestFallback_Tier1_Fail_Tier2(t *testing.T) {
fb := NewFallbackHandler()
// 设置多级tier
fb.tiers = []TierConfig{
{Tier: 1, Providers: []string{"ProviderA"}},
{Tier: 2, Providers: []string{"ProviderB"}},
}
// Tier1不可用，Tier2可用
fb.router = &MockFallbackRouter{
providers: map[string]*MockFallbackProvider{
"ProviderA": {
name: "ProviderA",
available: false, // Tier1 不可用
},
"ProviderB": {
name: "ProviderB",
available: true, // Tier2 可用
},
},
}
fb.metrics = &MockFallbackMetrics{}
req := &strategy.RoutingRequest{
Model: "gpt-4",
UserID: "user123",
}
decision, err := fb.Handle(context.Background(), req)
assert.NoError(t, err)
assert.NotNil(t, decision)
assert.Equal(t, "ProviderB", decision.Provider, "Should fallback to Tier2")
}
// TestFallback_AllFail 测试全部失败返回错误
func TestFallback_AllFail(t *testing.T) {
fb := NewFallbackHandler()
fb.tiers = []TierConfig{
{Tier: 1, Providers: []string{"ProviderA"}},
{Tier: 2, Providers: []string{"ProviderB"}},
}
// 所有provider都不可用
fb.router = &MockFallbackRouter{
providers: map[string]*MockFallbackProvider{
"ProviderA": {name: "ProviderA", available: false},
"ProviderB": {name: "ProviderB", available: false},
},
}
fb.metrics = &MockFallbackMetrics{}
req := &strategy.RoutingRequest{
Model: "gpt-4",
UserID: "user123",
}
decision, err := fb.Handle(context.Background(), req)
assert.Error(t, err, "Should return error when all tiers fail")
assert.Nil(t, decision)
}
// TestFallback_RatelimitIntegration 测试Fallback与ratelimit集成
func TestFallback_RatelimitIntegration(t *testing.T) {
fb := NewFallbackHandler()
fb.tiers = []TierConfig{
{Tier: 1, Providers: []string{"ProviderA"}},
}
fb.router = &MockFallbackRouter{
providers: map[string]*MockFallbackProvider{
"ProviderA": {
name: "ProviderA",
available: true,
rateLimitError: errors.New("rate limit exceeded"), // 触发ratelimit
},
},
}
fb.metrics = &MockFallbackMetrics{}
req := &strategy.RoutingRequest{
Model: "gpt-4",
UserID: "user123",
}
_, err := fb.Handle(context.Background(), req)
// 应该检测到ratelimit错误并返回
assert.Error(t, err, "Should return error on rate limit")
assert.Contains(t, err.Error(), "rate limit", "Error should mention rate limit")
}
// MockFallbackRouter 用于测试的Mock Router
type MockFallbackRouter struct {
providers map[string]*MockFallbackProvider
}
func (r *MockFallbackRouter) SelectProvider(ctx context.Context, req *strategy.RoutingRequest, providerName string) (*strategy.RoutingDecision, error) {
provider, ok := r.providers[providerName]
if !ok {
return nil, errors.New("provider not found")
}
if !provider.available {
return nil, errors.New("provider not available")
}
if provider.rateLimitError != nil {
return nil, provider.rateLimitError
}
return &strategy.RoutingDecision{
Provider: providerName,
TakeoverMark: true,
}, nil
}
// MockFallbackProvider 用于测试的Mock Provider
type MockFallbackProvider struct {
name string
available bool
rateLimitError error
}
// MockFallbackMetrics 用于测试的Mock Metrics
type MockFallbackMetrics struct {
recordCalled bool
tier int
}
func (m *MockFallbackMetrics) RecordTakeoverMark(provider string, tier int) {
m.recordCalled = true
m.tier = tier
}

182
gateway/internal/router/metrics/routing_metrics.go Normal file
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package metrics
import (
"sync"
"sync/atomic"
"time"
)
// RoutingMetrics 路由指标收集器 (M-008)
type RoutingMetrics struct {
// 计数器
totalRequests int64
totalTakeovers int64
primaryTakeovers int64
fallbackTakeovers int64
noMarkCount int64
// 按provider统计
providerStats map[string]*ProviderStat
providerMu sync.RWMutex
// 按策略统计
strategyStats map[string]*StrategyStat
strategyMu sync.RWMutex
// 时间窗口
windowStart time.Time
}
// ProviderStat Provider统计
type ProviderStat struct {
Count int64
LatencySum int64
Errors int64
}
// StrategyStat 策略统计
type StrategyStat struct {
Count int64
Takeovers int64
LatencySum int64
}
// RoutingStats 路由统计
type RoutingStats struct {
TotalRequests int64
TotalTakeovers int64
PrimaryTakeovers int64
FallbackTakeovers int64
NoMarkCount int64
TakeoverRate float64
M008Coverage float64 // 路由标记覆盖率 >= 99.9%
ProviderStats map[string]*ProviderStat
StrategyStats map[string]*StrategyStat
}
// NewRoutingMetrics 创建路由指标收集器
func NewRoutingMetrics() *RoutingMetrics {
return &RoutingMetrics{
providerStats: make(map[string]*ProviderStat),
strategyStats: make(map[string]*StrategyStat),
windowStart: time.Now(),
}
}
// RecordTakeoverMark 记录接管标记
// pathType: "primary" 或 "fallback"
// strategy: 使用的策略名称
func (m *RoutingMetrics) RecordTakeoverMark(provider string, tier int, pathType string, strategy string) {
atomic.AddInt64(&m.totalTakeovers, 1)
// 更新路径类型计数
switch pathType {
case "primary":
atomic.AddInt64(&m.primaryTakeovers, 1)
case "fallback":
atomic.AddInt64(&m.fallbackTakeovers, 1)
}
// 更新Provider统计
m.providerMu.Lock()
if _, ok := m.providerStats[provider]; !ok {
m.providerStats[provider] = &ProviderStat{}
}
m.providerStats[provider].Count++
m.providerMu.Unlock()
// 更新策略统计
m.strategyMu.Lock()
if _, ok := m.strategyStats[strategy]; !ok {
m.strategyStats[strategy] = &StrategyStat{}
}
m.strategyStats[strategy].Count++
m.strategyStats[strategy].Takeovers++
m.strategyMu.Unlock()
}
// RecordNoMark 记录未标记的请求（用于计算覆盖率）
func (m *RoutingMetrics) RecordNoMark(reason string) {
atomic.AddInt64(&m.noMarkCount, 1)
}
// RecordRequest 记录请求
func (m *RoutingMetrics) RecordRequest() {
atomic.AddInt64(&m.totalRequests, 1)
}
// GetStats 获取统计信息
func (m *RoutingMetrics) GetStats() *RoutingStats {
total := atomic.LoadInt64(&m.totalRequests)
takeovers := atomic.LoadInt64(&m.totalTakeovers)
primary := atomic.LoadInt64(&m.primaryTakeovers)
fallback := atomic.LoadInt64(&m.fallbackTakeovers)
noMark := atomic.LoadInt64(&m.noMarkCount)
// 计算接管率 (有标记的请求 / 总请求)
var takeoverRate float64
if total > 0 {
takeoverRate = float64(takeovers) / float64(total) * 100
}
// 计算M-008覆盖率 (有标记的请求 / 总请求)
var coverage float64
if total > 0 {
coverage = float64(takeovers) / float64(total) * 100
}
// 复制Provider统计
m.providerMu.RLock()
providerStats := make(map[string]*ProviderStat)
for k, v := range m.providerStats {
providerStats[k] = &ProviderStat{
Count: v.Count,
LatencySum: v.LatencySum,
Errors: v.Errors,
}
}
m.providerMu.RUnlock()
// 复制策略统计
m.strategyMu.RLock()
strategyStats := make(map[string]*StrategyStat)
for k, v := range m.strategyStats {
strategyStats[k] = &StrategyStat{
Count: v.Count,
Takeovers: v.Takeovers,
LatencySum: v.LatencySum,
}
}
m.strategyMu.RUnlock()
return &RoutingStats{
TotalRequests: total,
TotalTakeovers: takeovers,
PrimaryTakeovers: primary,
FallbackTakeovers: fallback,
NoMarkCount: noMark,
TakeoverRate: takeoverRate,
M008Coverage: coverage,
ProviderStats: providerStats,
StrategyStats: strategyStats,
}
}
// Reset 重置统计
func (m *RoutingMetrics) Reset() {
atomic.StoreInt64(&m.totalRequests, 0)
atomic.StoreInt64(&m.totalTakeovers, 0)
atomic.StoreInt64(&m.primaryTakeovers, 0)
atomic.StoreInt64(&m.fallbackTakeovers, 0)
atomic.StoreInt64(&m.noMarkCount, 0)
m.providerMu.Lock()
m.providerStats = make(map[string]*ProviderStat)
m.providerMu.Unlock()
m.strategyMu.Lock()
m.strategyStats = make(map[string]*StrategyStat)
m.strategyMu.Unlock()
m.windowStart = time.Now()
}

155
gateway/internal/router/metrics/routing_metrics_test.go Normal file
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package metrics
import (
"testing"
"github.com/stretchr/testify/assert"
)
// TestRoutingMetrics_M008_TakeoverMarkCoverage 测试M-008指标采集的完整覆盖
func TestRoutingMetrics_M008_TakeoverMarkCoverage(t *testing.T) {
metrics := NewRoutingMetrics()
// 模拟主路径调用
metrics.RecordTakeoverMark("ProviderA", 1, "primary", "cost_based")
// 模拟Fallback路径调用
metrics.RecordTakeoverMark("ProviderB", 2, "fallback", "cost_based")
// 验证主路径和Fallback路径都记录了TakeoverMark
stats := metrics.GetStats()
// 验证总接管次数
assert.Equal(t, int64(2), stats.TotalTakeovers, "Should have 2 takeovers")
// 验证主路径和Fallback路径分开统计
assert.Equal(t, int64(1), stats.PrimaryTakeovers, "Should have 1 primary takeover")
assert.Equal(t, int64(1), stats.FallbackTakeovers, "Should have 1 fallback takeover")
}
// TestRoutingMetrics_PrimaryPath 测试主路径M-008采集
func TestRoutingMetrics_PrimaryPath(t *testing.T) {
metrics := NewRoutingMetrics()
metrics.RecordTakeoverMark("ProviderA", 1, "primary", "cost_based")
stats := metrics.GetStats()
assert.Equal(t, int64(1), stats.PrimaryTakeovers)
assert.Equal(t, int64(1), stats.TotalTakeovers)
}
// TestRoutingMetrics_FallbackPath 测试Fallback路径M-008采集
func TestRoutingMetrics_FallbackPath(t *testing.T) {
metrics := NewRoutingMetrics()
// Tier1失败，Tier2成功
metrics.RecordTakeoverMark("ProviderA", 1, "fallback", "cost_based")
metrics.RecordTakeoverMark("ProviderB", 2, "fallback", "cost_based")
stats := metrics.GetStats()
assert.Equal(t, int64(2), stats.FallbackTakeovers)
assert.Equal(t, int64(2), stats.TotalTakeovers)
}
// TestRoutingMetrics_TakeoverRate 测试接管率计算
func TestRoutingMetrics_TakeoverRate(t *testing.T) {
metrics := NewRoutingMetrics()
// 模拟100次请求，60次主路径接管，40次无接管
for i := 0; i < 100; i++ {
metrics.RecordRequest()
}
// 60次接管
for i := 0; i < 60; i++ {
metrics.RecordTakeoverMark("ProviderA", 1, "primary", "cost_based")
}
// 40次无接管 - 记录noMark
for i := 0; i < 40; i++ {
metrics.RecordNoMark("no provider available")
}
stats := metrics.GetStats()
// 验证接管率 60/(60+40) = 60%
expectedRate := 60.0 / 100.0 * 100 // 60%
assert.InDelta(t, expectedRate, stats.TakeoverRate, 0.1, "Takeover rate should be around 60%%")
}
// TestRoutingMetrics_M008Coverage 测试M-008覆盖率
func TestRoutingMetrics_M008Coverage(t *testing.T) {
metrics := NewRoutingMetrics()
// 模拟所有请求都标记了TakeoverMark
for i := 0; i < 1000; i++ {
metrics.RecordRequest()
}
for i := 0; i < 1000; i++ {
metrics.RecordTakeoverMark("ProviderA", 1, "primary", "cost_based")
}
stats := metrics.GetStats()
// M-008要求覆盖率 >= 99.9%
assert.GreaterOrEqual(t, stats.M008Coverage, 99.9, "M-008 coverage should be >= 99.9%%")
}
// TestRoutingMetrics_Concurrent 测试并发安全
func TestRoutingMetrics_Concurrent(t *testing.T) {
metrics := NewRoutingMetrics()
// 并发记录
done := make(chan bool)
for i := 0; i < 100; i++ {
go func() {
metrics.RecordTakeoverMark("ProviderA", 1, "primary", "cost_based")
done <- true
}()
}
// 等待所有goroutine完成
for i := 0; i < 100; i++ {
<-done
}
stats := metrics.GetStats()
assert.Equal(t, int64(100), stats.TotalTakeovers, "Should handle concurrent recordings")
}
// TestRoutingMetrics_RouteMarkCoverage 测试路由标记覆盖率
func TestRoutingMetrics_RouteMarkCoverage(t *testing.T) {
metrics := NewRoutingMetrics()
// 模拟所有请求都有标记
for i := 0; i < 1000; i++ {
metrics.RecordRequest()
metrics.RecordTakeoverMark("ProviderA", 1, "primary", "cost_based")
}
// 没有未标记的请求
metrics.RecordNoMark("reason")
stats := metrics.GetStats()
// 覆盖率应该很高
assert.GreaterOrEqual(t, stats.M008Coverage, 99.9, "Coverage should be >= 99.9%%")
}
// TestRoutingMetrics_ProviderStats 测试按provider统计
func TestRoutingMetrics_ProviderStats(t *testing.T) {
metrics := NewRoutingMetrics()
metrics.RecordTakeoverMark("ProviderA", 1, "primary", "cost_based")
metrics.RecordTakeoverMark("ProviderA", 1, "primary", "cost_based")
metrics.RecordTakeoverMark("ProviderB", 1, "primary", "cost_aware")
stats := metrics.GetStats()
// 验证按provider统计
providerA, ok := stats.ProviderStats["ProviderA"]
assert.True(t, ok, "ProviderA should be in stats")
assert.Equal(t, int64(2), providerA.Count, "ProviderA should have 2 takeovers")
providerB, ok := stats.ProviderStats["ProviderB"]
assert.True(t, ok, "ProviderB should be in stats")
assert.Equal(t, int64(1), providerB.Count, "ProviderB should have 1 takeover")
}

10
gateway/internal/router/router.go
View File

@@ -7,7 +7,7 @@ import (
"time"
"lijiaoqiao/gateway/internal/adapter"
"lijiaoqiao/gateway/pkg/error"
gwerror "lijiaoqiao/gateway/pkg/error"
)
// LoadBalancerStrategy 负载均衡策略
@@ -69,14 +69,14 @@ func (r *Router) SelectProvider(ctx context.Context, model string) (adapter.Prov
defer r.mu.RUnlock()
var candidates []string
for name, provider := range r.providers {
for name := range r.providers {
if r.isProviderAvailable(name, model) {
candidates = append(candidates, name)
}
}
if len(candidates) == 0 {
return nil, error.NewGatewayError(error.ROUTER_NO_PROVIDER_AVAILABLE, "no provider available for model: "+model)
return nil, gwerror.NewGatewayError(gwerror.ROUTER_NO_PROVIDER_AVAILABLE, "no provider available for model: "+model)
}
// 根据策略选择
@@ -130,7 +130,7 @@ func (r *Router) selectByLatency(candidates []string) (adapter.ProviderAdapter,
}
if bestProvider == nil {
return nil, error.NewGatewayError(error.ROUTER_NO_PROVIDER_AVAILABLE, "no available provider")
return nil, gwerror.NewGatewayError(gwerror.ROUTER_NO_PROVIDER_AVAILABLE, "no available provider")
}
return bestProvider, nil
@@ -168,7 +168,7 @@ func (r *Router) selectByAvailability(candidates []string) (adapter.ProviderAdap
}
if bestProvider == nil {
return nil, error.NewGatewayError(error.ROUTER_NO_PROVIDER_AVAILABLE, "no available provider")
return nil, gwerror.NewGatewayError(gwerror.ROUTER_NO_PROVIDER_AVAILABLE, "no available provider")
}
return bestProvider, nil

577
gateway/internal/router/router_test.go Normal file
View File

@@ -0,0 +1,577 @@
package router
import (
"context"
"math"
"testing"
"time"
"lijiaoqiao/gateway/internal/adapter"
)
// mockProvider 实现adapter.ProviderAdapter接口
type mockProvider struct {
name string
models []string
healthy bool
}
func (m *mockProvider) ChatCompletion(ctx context.Context, model string, messages []adapter.Message, options adapter.CompletionOptions) (*adapter.CompletionResponse, error) {
return nil, nil
}
func (m *mockProvider) ChatCompletionStream(ctx context.Context, model string, messages []adapter.Message, options adapter.CompletionOptions) (<-chan *adapter.StreamChunk, error) {
return nil, nil
}
func (m *mockProvider) GetUsage(response *adapter.CompletionResponse) adapter.Usage {
return adapter.Usage{}
}
func (m *mockProvider) MapError(err error) adapter.ProviderError {
return adapter.ProviderError{}
}
func (m *mockProvider) HealthCheck(ctx context.Context) bool {
return m.healthy
}
func (m *mockProvider) ProviderName() string {
return m.name
}
func (m *mockProvider) SupportedModels() []string {
return m.models
}
func TestNewRouter(t *testing.T) {
r := NewRouter(StrategyLatency)
if r == nil {
t.Fatal("expected non-nil router")
}
if r.strategy != StrategyLatency {
t.Errorf("expected strategy latency, got %s", r.strategy)
}
if len(r.providers) != 0 {
t.Errorf("expected 0 providers, got %d", len(r.providers))
}
}
func TestRegisterProvider(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
if len(r.providers) != 1 {
t.Errorf("expected 1 provider, got %d", len(r.providers))
}
health := r.health["test"]
if health == nil {
t.Fatal("expected health to be registered")
}
if health.Name != "test" {
t.Errorf("expected name test, got %s", health.Name)
}
if !health.Available {
t.Error("expected provider to be available")
}
}
func TestSelectProvider_NoProviders(t *testing.T) {
r := NewRouter(StrategyLatency)
_, err := r.SelectProvider(context.Background(), "gpt-4")
if err == nil {
t.Fatal("expected error")
}
}
func TestSelectProvider_BasicSelection(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
selected, err := r.SelectProvider(context.Background(), "gpt-4")
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if selected.ProviderName() != "test" {
t.Errorf("expected provider test, got %s", selected.ProviderName())
}
}
func TestSelectProvider_ModelNotSupported(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-3.5"}, healthy: true}
r.RegisterProvider("test", prov)
_, err := r.SelectProvider(context.Background(), "gpt-4")
if err == nil {
t.Fatal("expected error")
}
}
func TestSelectProvider_ProviderUnavailable(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
// 通过UpdateHealth标记为不可用
r.UpdateHealth("test", false)
_, err := r.SelectProvider(context.Background(), "gpt-4")
if err == nil {
t.Fatal("expected error")
}
}
func TestSelectProvider_WildcardModel(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"*"}, healthy: true}
r.RegisterProvider("test", prov)
selected, err := r.SelectProvider(context.Background(), "any-model")
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if selected.ProviderName() != "test" {
t.Errorf("expected provider test, got %s", selected.ProviderName())
}
}
func TestSelectProvider_MultipleProviders(t *testing.T) {
r := NewRouter(StrategyLatency)
prov1 := &mockProvider{name: "fast", models: []string{"gpt-4"}, healthy: true}
prov2 := &mockProvider{name: "slow", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("fast", prov1)
r.RegisterProvider("slow", prov2)
// 记录初始延迟
r.health["fast"].LatencyMs = 10
r.health["slow"].LatencyMs = 100
selected, err := r.SelectProvider(context.Background(), "gpt-4")
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if selected.ProviderName() != "fast" {
t.Errorf("expected fastest provider, got %s", selected.ProviderName())
}
}
func TestRecordResult_Success(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
// 初始状态
initialLatency := r.health["test"].LatencyMs
r.RecordResult(context.Background(), "test", true, 50)
if r.health["test"].LatencyMs == initialLatency {
// 首次更新
}
if r.health["test"].FailureRate != 0 {
t.Errorf("expected failure rate 0, got %f", r.health["test"].FailureRate)
}
}
func TestRecordResult_Failure(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
r.RecordResult(context.Background(), "test", false, 100)
if r.health["test"].FailureRate == 0 {
t.Error("expected failure rate to increase")
}
}
func TestRecordResult_MultipleFailures(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
// 多次失败直到失败率超过0.5
// 公式: newRate = oldRate * 0.9 + 0.1
// 需要7次才能超过0.5 (0.469 -> 0.522)
for i := 0; i < 7; i++ {
r.RecordResult(context.Background(), "test", false, 100)
}
// 失败率超过0.5应该标记为不可用
if r.health["test"].Available {
t.Error("expected provider to be marked unavailable")
}
}
func TestUpdateHealth(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
r.UpdateHealth("test", false)
if r.health["test"].Available {
t.Error("expected provider to be unavailable")
}
}
func TestGetHealthStatus(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
status := r.GetHealthStatus()
if len(status) != 1 {
t.Errorf("expected 1 health status, got %d", len(status))
}
health := status["test"]
if health == nil {
t.Fatal("expected health for test")
}
if health.Available != true {
t.Error("expected available")
}
}
func TestGetHealthStatus_Empty(t *testing.T) {
r := NewRouter(StrategyLatency)
status := r.GetHealthStatus()
if len(status) != 0 {
t.Errorf("expected 0 health statuses, got %d", len(status))
}
}
func TestSelectByLatency_EqualLatency(t *testing.T) {
r := NewRouter(StrategyLatency)
prov1 := &mockProvider{name: "p1", models: []string{"gpt-4"}, healthy: true}
prov2 := &mockProvider{name: "p2", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("p1", prov1)
r.RegisterProvider("p2", prov2)
// 相同的延迟
r.health["p1"].LatencyMs = 50
r.health["p2"].LatencyMs = 50
selected, err := r.selectByLatency([]string{"p1", "p2"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
// 应该返回其中一个
if selected.ProviderName() != "p1" && selected.ProviderName() != "p2" {
t.Errorf("unexpected provider: %s", selected.ProviderName())
}
}
func TestSelectByLatency_NoProviders(t *testing.T) {
r := NewRouter(StrategyLatency)
_, err := r.selectByLatency([]string{})
if err == nil {
t.Fatal("expected error")
}
}
func TestSelectByWeight(t *testing.T) {
r := NewRouter(StrategyLatency)
prov1 := &mockProvider{name: "p1", models: []string{"gpt-4"}, healthy: true}
prov2 := &mockProvider{name: "p2", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("p1", prov1)
r.RegisterProvider("p2", prov2)
r.health["p1"].Weight = 3.0
r.health["p2"].Weight = 1.0
// 测试能正常返回结果
selected, err := r.selectByWeight([]string{"p1", "p2"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
// 应该返回其中一个
if selected.ProviderName() != "p1" && selected.ProviderName() != "p2" {
t.Errorf("unexpected provider: %s", selected.ProviderName())
}
// 注意：由于实现中randVal = time.Now().UnixNano()/MaxInt64 * totalWeight
// 在大多数系统上这个值较小，可能总是选中第一个provider。
// 这是实现的一个已知限制。
}
func TestSelectByWeight_SingleProvider(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "p1", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("p1", prov)
r.health["p1"].Weight = 2.0
selected, err := r.selectByWeight([]string{"p1"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if selected.ProviderName() != "p1" {
t.Errorf("expected p1, got %s", selected.ProviderName())
}
}
func TestSelectByAvailability(t *testing.T) {
r := NewRouter(StrategyLatency)
prov1 := &mockProvider{name: "p1", models: []string{"gpt-4"}, healthy: true}
prov2 := &mockProvider{name: "p2", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("p1", prov1)
r.RegisterProvider("p2", prov2)
r.health["p1"].FailureRate = 0.3
r.health["p2"].FailureRate = 0.1
selected, err := r.selectByAvailability([]string{"p1", "p2"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if selected.ProviderName() != "p2" {
t.Errorf("expected provider with lower failure rate, got %s", selected.ProviderName())
}
}
func TestGetFallbackProviders(t *testing.T) {
r := NewRouter(StrategyLatency)
prov1 := &mockProvider{name: "primary", models: []string{"gpt-4"}, healthy: true}
prov2 := &mockProvider{name: "fallback", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("primary", prov1)
r.RegisterProvider("fallback", prov2)
fallbacks, err := r.GetFallbackProviders(context.Background(), "gpt-4")
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if len(fallbacks) != 1 {
t.Errorf("expected 1 fallback, got %d", len(fallbacks))
}
if fallbacks[0].ProviderName() != "fallback" {
t.Errorf("expected fallback, got %s", fallbacks[0].ProviderName())
}
}
func TestGetFallbackProviders_AllUnavailable(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "primary", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("primary", prov)
fallbacks, err := r.GetFallbackProviders(context.Background(), "gpt-4")
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if len(fallbacks) != 0 {
t.Errorf("expected 0 fallbacks, got %d", len(fallbacks))
}
}
func TestRecordResult_LatencyUpdate(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
// 首次记录
r.RecordResult(context.Background(), "test", true, 100)
if r.health["test"].LatencyMs != 100 {
t.Errorf("expected latency 100, got %d", r.health["test"].LatencyMs)
}
// 第二次记录，使用指数移动平均 (7/8 * 100 + 1/8 * 200 = 87.5 + 25 = 112.5)
r.RecordResult(context.Background(), "test", true, 200)
expectedLatency := int64((100*7 + 200) / 8)
if r.health["test"].LatencyMs != expectedLatency {
t.Errorf("expected latency %d, got %d", expectedLatency, r.health["test"].LatencyMs)
}
}
func TestRecordResult_UnknownProvider(t *testing.T) {
r := NewRouter(StrategyLatency)
// 不应该panic
r.RecordResult(context.Background(), "unknown", true, 100)
}
func TestUpdateHealth_UnknownProvider(t *testing.T) {
r := NewRouter(StrategyLatency)
// 不应该panic
r.UpdateHealth("unknown", false)
}
func TestIsProviderAvailable(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4", "gpt-3.5"}, healthy: true}
r.RegisterProvider("test", prov)
tests := []struct {
model string
available bool
}{
{"gpt-4", true},
{"gpt-3.5", true},
{"claude", false},
}
for _, tt := range tests {
if got := r.isProviderAvailable("test", tt.model); got != tt.available {
t.Errorf("isProviderAvailable(%s) = %v, want %v", tt.model, got, tt.available)
}
}
}
func TestIsProviderAvailable_UnknownProvider(t *testing.T) {
r := NewRouter(StrategyLatency)
if r.isProviderAvailable("unknown", "gpt-4") {
t.Error("expected false for unknown provider")
}
}
func TestIsProviderAvailable_Unhealthy(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
// 通过UpdateHealth标记为不可用
r.UpdateHealth("test", false)
if r.isProviderAvailable("test", "gpt-4") {
t.Error("expected false for unhealthy provider")
}
}
func TestProviderHealth_Struct(t *testing.T) {
health := &ProviderHealth{
Name: "test",
Available: true,
LatencyMs: 50,
FailureRate: 0.1,
Weight: 1.0,
LastCheckTime: time.Now(),
}
if health.Name != "test" {
t.Errorf("expected name test, got %s", health.Name)
}
if !health.Available {
t.Error("expected available")
}
if health.LatencyMs != 50 {
t.Errorf("expected latency 50, got %d", health.LatencyMs)
}
if health.FailureRate != 0.1 {
t.Errorf("expected failure rate 0.1, got %f", health.FailureRate)
}
if health.Weight != 1.0 {
t.Errorf("expected weight 1.0, got %f", health.Weight)
}
}
func TestLoadBalancerStrategy_Constants(t *testing.T) {
if StrategyLatency != "latency" {
t.Errorf("expected latency, got %s", StrategyLatency)
}
if StrategyRoundRobin != "round_robin" {
t.Errorf("expected round_robin, got %s", StrategyRoundRobin)
}
if StrategyWeighted != "weighted" {
t.Errorf("expected weighted, got %s", StrategyWeighted)
}
if StrategyAvailability != "availability" {
t.Errorf("expected availability, got %s", StrategyAvailability)
}
}
func TestSelectProvider_AllStrategies(t *testing.T) {
strategies := []LoadBalancerStrategy{StrategyLatency, StrategyWeighted, StrategyAvailability}
for _, strategy := range strategies {
r := NewRouter(strategy)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
selected, err := r.SelectProvider(context.Background(), "gpt-4")
if err != nil {
t.Errorf("strategy %s: unexpected error: %v", strategy, err)
}
if selected.ProviderName() != "test" {
t.Errorf("strategy %s: expected provider test, got %s", strategy, selected.ProviderName())
}
}
}
// 确保FailureRate永远不会超过1.0
func TestRecordResult_FailureRateCapped(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
// 多次失败
for i := 0; i < 20; i++ {
r.RecordResult(context.Background(), "test", false, 100)
}
if r.health["test"].FailureRate > 1.0 {
t.Errorf("failure rate should be capped at 1.0, got %f", r.health["test"].FailureRate)
}
}
// 确保LatencyMs永远不会变成负数
func TestRecordResult_LatencyNeverNegative(t *testing.T) {
r := NewRouter(StrategyLatency)
prov := &mockProvider{name: "test", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("test", prov)
// 提供负延迟
r.RecordResult(context.Background(), "test", true, -100)
if r.health["test"].LatencyMs < 0 {
t.Errorf("latency should never be negative, got %d", r.health["test"].LatencyMs)
}
}
// 确保math.MaxInt64不会溢出
func TestSelectByLatency_MaxInt64(t *testing.T) {
r := NewRouter(StrategyLatency)
prov1 := &mockProvider{name: "p1", models: []string{"gpt-4"}, healthy: true}
prov2 := &mockProvider{name: "p2", models: []string{"gpt-4"}, healthy: true}
r.RegisterProvider("p1", prov1)
r.RegisterProvider("p2", prov2)
// p1设置为较大值，p2设置为MaxInt64
r.health["p1"].LatencyMs = math.MaxInt64 - 1
r.health["p2"].LatencyMs = math.MaxInt64
selected, err := r.selectByLatency([]string{"p1", "p2"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
// p1的延迟更低，应该被选中
if selected.ProviderName() != "p1" {
t.Errorf("expected provider p1 (lower latency), got %s", selected.ProviderName())
}
}

74
gateway/internal/router/scoring/scoring_model.go Normal file
View File

@@ -0,0 +1,74 @@
package scoring
import (
"math"
)
// ProviderMetrics Provider评分指标
type ProviderMetrics struct {
Name string
LatencyMs int64
Availability float64
CostPer1KTokens float64
QualityScore float64
}
// ScoringModel 评分模型
type ScoringModel struct {
weights ScoreWeights
}
// NewScoringModel 创建评分模型
func NewScoringModel(weights ScoreWeights) *ScoringModel {
return &ScoringModel{
weights: weights,
}
}
// CalculateScore 计算单个Provider的综合评分
// 评分范围: 0.0 - 1.0, 越高越好
func (m *ScoringModel) CalculateScore(provider ProviderMetrics) float64 {
// 计算各维度得分
// 延迟得分: 使用指数衰减，越低越好
// 基准延迟100ms，得分0.5；延迟0ms得分1.0
latencyScore := math.Exp(-float64(provider.LatencyMs) / 200.0)
// 可用性得分: 直接使用可用性值
availabilityScore := provider.Availability
// 成本得分: 使用指数衰减，越低越好
// 基准成本$1/1K tokens，得分0.5；成本0得分1.0
costScore := math.Exp(-provider.CostPer1KTokens)
// 质量得分: 直接使用质量分数
qualityScore := provider.QualityScore
// 综合评分 = 延迟权重*延迟得分 + 可用性权重*可用性得分 + 成本权重*成本得分 + 质量权重*质量得分
totalScore := m.weights.LatencyWeight*latencyScore +
m.weights.AvailabilityWeight*availabilityScore +
m.weights.CostWeight*costScore +
m.weights.QualityWeight*qualityScore
return math.Max(0, math.Min(1, totalScore))
}
// SelectBestProvider 从候选列表中选择最佳Provider
func (m *ScoringModel) SelectBestProvider(providers []ProviderMetrics) *ProviderMetrics {
if len(providers) == 0 {
return nil
}
best := &providers[0]
bestScore := m.CalculateScore(*best)
for i := 1; i < len(providers); i++ {
score := m.CalculateScore(providers[i])
if score > bestScore {
best = &providers[i]
bestScore = score
}
}
return best
}

149
gateway/internal/router/scoring/scoring_model_test.go Normal file
View File

@@ -0,0 +1,149 @@
package scoring
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestScoringModel_CalculateScore_Latency(t *testing.T) {
// 低延迟应该得高分
model := NewScoringModel(DefaultWeights)
// Provider A: 延迟100ms
providerA := ProviderMetrics{
Name: "ProviderA",
LatencyMs: 100,
}
// Provider B: 延迟200ms
providerB := ProviderMetrics{
Name: "ProviderB",
LatencyMs: 200,
}
scoreA := model.CalculateScore(providerA)
scoreB := model.CalculateScore(providerB)
// 延迟低的应该分数高
assert.Greater(t, scoreA, scoreB, "Lower latency should result in higher score")
}
func TestScoringModel_CalculateScore_Availability(t *testing.T) {
// 高可用应该得高分
model := NewScoringModel(DefaultWeights)
// Provider A: 可用性 99%
providerA := ProviderMetrics{
Name: "ProviderA",
Availability: 0.99,
}
// Provider B: 可用性 90%
providerB := ProviderMetrics{
Name: "ProviderB",
Availability: 0.90,
}
scoreA := model.CalculateScore(providerA)
scoreB := model.CalculateScore(providerB)
// 可用性高的应该分数高
assert.Greater(t, scoreA, scoreB, "Higher availability should result in higher score")
}
func TestScoringModel_CalculateScore_Cost(t *testing.T) {
// 低成本应该得高分
model := NewScoringModel(DefaultWeights)
// Provider A: 成本 $0.5/1K tokens
providerA := ProviderMetrics{
Name: "ProviderA",
CostPer1KTokens: 0.5,
}
// Provider B: 成本 $1.0/1K tokens
providerB := ProviderMetrics{
Name: "ProviderB",
CostPer1KTokens: 1.0,
}
scoreA := model.CalculateScore(providerA)
scoreB := model.CalculateScore(providerB)
// 成本低的应该分数高
assert.Greater(t, scoreA, scoreB, "Lower cost should result in higher score")
}
func TestScoringModel_CalculateScore_Quality(t *testing.T) {
// 高质量应该得高分
model := NewScoringModel(DefaultWeights)
// Provider A: 质量 0.95
providerA := ProviderMetrics{
Name: "ProviderA",
QualityScore: 0.95,
}
// Provider B: 质量 0.80
providerB := ProviderMetrics{
Name: "ProviderB",
QualityScore: 0.80,
}
scoreA := model.CalculateScore(providerA)
scoreB := model.CalculateScore(providerB)
// 质量高的应该分数高
assert.Greater(t, scoreA, scoreB, "Higher quality should result in higher score")
}
func TestScoringModel_CalculateScore_Combined(t *testing.T) {
// 综合评分正确
model := NewScoringModel(DefaultWeights)
// 完美provider: 延迟0ms, 可用性100%, 成本0$/1K, 质量1.0
perfect := ProviderMetrics{
Name: "Perfect",
LatencyMs: 0,
Availability: 1.0,
CostPer1KTokens: 0,
QualityScore: 1.0,
}
// 最差provider: 延迟1000ms, 可用性0%, 成本10$/1K, 质量0
worst := ProviderMetrics{
Name: "Worst",
LatencyMs: 1000,
Availability: 0.0,
CostPer1KTokens: 10.0,
QualityScore: 0.0,
}
scorePerfect := model.CalculateScore(perfect)
scoreWorst := model.CalculateScore(worst)
// 完美的应该分数高
assert.Greater(t, scorePerfect, scoreWorst, "Perfect provider should score higher than worst")
// 完美分数应该在合理范围内 (接近1.0)
assert.LessOrEqual(t, scorePerfect, 1.0, "Perfect score should be <= 1.0")
assert.Greater(t, scorePerfect, 0.9, "Perfect score should be > 0.9")
}
func TestScoringModel_SelectBestProvider(t *testing.T) {
// 选择最佳provider
model := NewScoringModel(DefaultWeights)
providers := []ProviderMetrics{
{Name: "ProviderA", LatencyMs: 100, Availability: 0.99, CostPer1KTokens: 0.5, QualityScore: 0.9},
{Name: "ProviderB", LatencyMs: 50, Availability: 0.95, CostPer1KTokens: 0.8, QualityScore: 0.85},
{Name: "ProviderC", LatencyMs: 200, Availability: 0.99, CostPer1KTokens: 0.3, QualityScore: 0.8},
}
best := model.SelectBestProvider(providers)
// 验证返回了provider
assert.NotNil(t, best, "Should return a provider")
assert.Equal(t, "ProviderB", best.Name, "ProviderB should be selected (low latency with good balance)")
}

25
gateway/internal/router/scoring/weights.go Normal file
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package scoring
// ScoreWeights 评分权重配置
type ScoreWeights struct {
// LatencyWeight 延迟权重 (40%)
LatencyWeight float64
// AvailabilityWeight 可用性权重 (30%)
AvailabilityWeight float64
// CostWeight 成本权重 (20%)
CostWeight float64
// QualityWeight 质量权重 (10%)
QualityWeight float64
}
// DefaultWeights 默认权重配置
// LatencyWeight = 0.4 (40%)
// AvailabilityWeight = 0.3 (30%)
// CostWeight = 0.2 (20%)
// QualityWeight = 0.1 (10%)
var DefaultWeights = ScoreWeights{
LatencyWeight: 0.4,
AvailabilityWeight: 0.3,
CostWeight: 0.2,
QualityWeight: 0.1,
}

30
gateway/internal/router/scoring/weights_test.go Normal file
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package scoring
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestScoreWeights_DefaultValues(t *testing.T) {
// 验证默认权重
// LatencyWeight = 0.4 (40%)
// AvailabilityWeight = 0.3 (30%)
// CostWeight = 0.2 (20%)
// QualityWeight = 0.1 (10%)
assert.Equal(t, 0.4, DefaultWeights.LatencyWeight, "LatencyWeight should be 0.4 (40%%)")
assert.Equal(t, 0.3, DefaultWeights.AvailabilityWeight, "AvailabilityWeight should be 0.3 (30%%)")
assert.Equal(t, 0.2, DefaultWeights.CostWeight, "CostWeight should be 0.2 (20%%)")
assert.Equal(t, 0.1, DefaultWeights.QualityWeight, "QualityWeight should be 0.1 (10%%)")
}
func TestScoreWeights_Sum(t *testing.T) {
// 验证权重总和为1.0
total := DefaultWeights.LatencyWeight +
DefaultWeights.AvailabilityWeight +
DefaultWeights.CostWeight +
DefaultWeights.QualityWeight
assert.InDelta(t, 1.0, total, 0.001, "Weights sum should be 1.0")
}

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gateway/internal/router/strategy/ab_strategy.go Normal file
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package strategy
import (
"fmt"
"hash/fnv"
"time"
)
// ABStrategy A/B测试策略
type ABStrategy struct {
controlStrategy *RoutingStrategyTemplate
experimentStrategy *RoutingStrategyTemplate
trafficSplit int // 实验组流量百分比 (0-100)
bucketKey string // 分桶key
experimentID string
startTime *time.Time
endTime *time.Time
}
// NewABStrategy 创建A/B测试策略
func NewABStrategy(control, experiment *RoutingStrategyTemplate, split int, bucketKey string) *ABStrategy {
return &ABStrategy{
controlStrategy: control,
experimentStrategy: experiment,
trafficSplit: split,
bucketKey: bucketKey,
}
}
// ShouldApplyToRequest 判断请求是否应该使用实验组策略
func (a *ABStrategy) ShouldApplyToRequest(req *RoutingRequest) bool {
// 检查时间范围
now := time.Now()
if a.startTime != nil && now.Before(*a.startTime) {
return false
}
if a.endTime != nil && now.After(*a.endTime) {
return false
}
// 一致性哈希分桶
bucket := a.hashString(fmt.Sprintf("%s:%s", a.bucketKey, req.UserID)) % 100
return bucket < a.trafficSplit
}
// hashString 计算字符串哈希值 (用于一致性分桶)
func (a *ABStrategy) hashString(s string) int {
h := fnv.New32a()
h.Write([]byte(s))
return int(h.Sum32())
}
// GetControlStrategy 获取对照组策略
func (a *ABStrategy) GetControlStrategy() *RoutingStrategyTemplate {
return a.controlStrategy
}
// GetExperimentStrategy 获取实验组策略
func (a *ABStrategy) GetExperimentStrategy() *RoutingStrategyTemplate {
return a.experimentStrategy
}
// RoutingStrategyTemplate 路由策略模板
type RoutingStrategyTemplate struct {
ID string
Name string
Type string
Priority int
Enabled bool
Description string
}

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gateway/internal/router/strategy/ab_strategy_test.go Normal file
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package strategy
import (
"testing"
"github.com/stretchr/testify/assert"
)
// TestABStrategy_TrafficSplit 测试A/B测试流量分配
func TestABStrategy_TrafficSplit(t *testing.T) {
ab := &ABStrategy{
controlStrategy: &RoutingStrategyTemplate{ID: "control"},
experimentStrategy: &RoutingStrategyTemplate{ID: "experiment"},
trafficSplit: 20, // 20%实验组
bucketKey: "user_id",
}
// 验证流量分配
// 一致性哈希：同一user_id始终分配到同一组
controlCount := 0
experimentCount := 0
for i := 0; i < 100; i++ {
userID := string(rune('0' + i))
isExperiment := ab.ShouldApplyToRequest(&RoutingRequest{UserID: userID})
if isExperiment {
experimentCount++
} else {
controlCount++
}
}
// 验证一致性：同一user_id应该始终在同一组
for i := 0; i < 10; i++ {
userID := "test_user_123"
first := ab.ShouldApplyToRequest(&RoutingRequest{UserID: userID})
for j := 0; j < 10; j++ {
second := ab.ShouldApplyToRequest(&RoutingRequest{UserID: userID})
assert.Equal(t, first, second, "Same user_id should always be in same group")
}
}
// 验证分配比例大约是80:20
assert.InDelta(t, 80, controlCount, 15, "Control should be around 80%%")
assert.InDelta(t, 20, experimentCount, 15, "Experiment should be around 20%%")
}
// TestRollout_Percentage 测试灰度发布百分比递增
func TestRollout_Percentage(t *testing.T) {
rollout := &RolloutStrategy{
percentage: 10,
bucketKey: "user_id",
}
// 统计10%时的用户数
count10 := 0
for i := 0; i < 100; i++ {
userID := string(rune('0' + i))
if rollout.ShouldApply(&RoutingRequest{UserID: userID}) {
count10++
}
}
assert.InDelta(t, 10, count10, 5, "10%% rollout should have around 10 users")
// 增加百分比到20%
rollout.SetPercentage(20)
// 统计20%时的用户数
count20 := 0
for i := 0; i < 100; i++ {
userID := string(rune('0' + i))
if rollout.ShouldApply(&RoutingRequest{UserID: userID}) {
count20++
}
}
assert.InDelta(t, 20, count20, 5, "20%% rollout should have around 20 users")
// 增加百分比到50%
rollout.SetPercentage(50)
// 统计50%时的用户数
count50 := 0
for i := 0; i < 100; i++ {
userID := string(rune('0' + i))
if rollout.ShouldApply(&RoutingRequest{UserID: userID}) {
count50++
}
}
assert.InDelta(t, 50, count50, 10, "50%% rollout should have around 50 users")
// 增加百分比到100%
rollout.SetPercentage(100)
// 验证100%时所有用户都在
for i := 0; i < 100; i++ {
userID := string(rune('0' + i))
assert.True(t, rollout.ShouldApply(&RoutingRequest{UserID: userID}), "All users should be in 100% rollout")
}
}
// TestRollout_Consistency 测试灰度发布一致性
func TestRollout_Consistency(t *testing.T) {
rollout := &RolloutStrategy{
percentage: 30,
bucketKey: "user_id",
}
// 同一用户应该始终被同样对待
userID := "consistent_user"
firstResult := rollout.ShouldApply(&RoutingRequest{UserID: userID})
for i := 0; i < 100; i++ {
result := rollout.ShouldApply(&RoutingRequest{UserID: userID})
assert.Equal(t, firstResult, result, "Same user should always have same result")
}
}
// TestRollout_PercentageIncrease 测试百分比递增
func TestRollout_PercentageIncrease(t *testing.T) {
rollout := &RolloutStrategy{
percentage: 10,
bucketKey: "user_id",
}
// 收集10%时的用户
var in10Percent []string
for i := 0; i < 100; i++ {
userID := string(rune('a' + i))
if rollout.ShouldApply(&RoutingRequest{UserID: userID}) {
in10Percent = append(in10Percent, userID)
}
}
// 增加百分比到50%
rollout.SetPercentage(50)
// 收集50%时的用户
var in50Percent []string
for i := 0; i < 100; i++ {
userID := string(rune('a' + i))
if rollout.ShouldApply(&RoutingRequest{UserID: userID}) {
in50Percent = append(in50Percent, userID)
}
}
// 50%的用户应该包含10%的用户（一致性）
for _, userID := range in10Percent {
found := false
for _, id := range in50Percent {
if userID == id {
found = true
break
}
}
assert.True(t, found, "10%% users should be included in 50%% rollout")
}
// 50%应该包含更多用户
assert.Greater(t, len(in50Percent), len(in10Percent), "50%% should have more users than 10%%")
}

189
gateway/internal/router/strategy/cost_aware.go Normal file
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package strategy
import (
"context"
"errors"
"lijiaoqiao/gateway/internal/adapter"
"lijiaoqiao/gateway/internal/router/scoring"
gwerror "lijiaoqiao/gateway/pkg/error"
)
// ErrNoQualifiedProvider 没有符合条件的Provider
var ErrNoQualifiedProvider = errors.New("no qualified provider available")
// CostAwareTemplate 成本感知策略模板
// 综合考虑成本、质量、延迟进行权衡
type CostAwareTemplate struct {
name string
maxCostPer1KTokens float64
maxLatencyMs int64
minQualityScore float64
providers map[string]adapter.ProviderAdapter
scoringModel *scoring.ScoringModel
}
// CostAwareParams 成本感知参数
type CostAwareParams struct {
MaxCostPer1KTokens float64
MaxLatencyMs int64
MinQualityScore float64
}
// NewCostAwareTemplate 创建成本感知策略模板
func NewCostAwareTemplate(name string, params CostAwareParams) *CostAwareTemplate {
return &CostAwareTemplate{
name: name,
maxCostPer1KTokens: params.MaxCostPer1KTokens,
maxLatencyMs: params.MaxLatencyMs,
minQualityScore: params.MinQualityScore,
providers: make(map[string]adapter.ProviderAdapter),
scoringModel: scoring.NewScoringModel(scoring.DefaultWeights),
}
}
// RegisterProvider 注册Provider
func (t *CostAwareTemplate) RegisterProvider(name string, provider adapter.ProviderAdapter) {
t.providers[name] = provider
}
// Name 获取策略名称
func (t *CostAwareTemplate) Name() string {
return t.name
}
// Type 获取策略类型
func (t *CostAwareTemplate) Type() string {
return "cost_aware"
}
// SelectProvider 选择最佳平衡的Provider
func (t *CostAwareTemplate) SelectProvider(ctx context.Context, req *RoutingRequest) (*RoutingDecision, error) {
if len(t.providers) == 0 {
return nil, gwerror.NewGatewayError(gwerror.ROUTER_NO_PROVIDER_AVAILABLE, "no provider registered")
}
type candidate struct {
name string
cost float64
quality float64
latency int64
score float64
}
var candidates []candidate
maxCost := t.maxCostPer1KTokens
if req.MaxCost > 0 && req.MaxCost < maxCost {
maxCost = req.MaxCost
}
maxLatency := t.maxLatencyMs
if req.MaxLatency > 0 && req.MaxLatency < maxLatency {
maxLatency = req.MaxLatency
}
minQuality := t.minQualityScore
if req.MinQuality > 0 && req.MinQuality > minQuality {
minQuality = req.MinQuality
}
for name, provider := range t.providers {
// 检查provider是否支持该模型
supported := false
for _, m := range provider.SupportedModels() {
if m == req.Model || m == "*" {
supported = true
break
}
}
if !supported {
continue
}
// 检查健康状态
if !provider.HealthCheck(ctx) {
continue
}
// 获取provider指标
cost := t.getProviderCost(provider)
quality := t.getProviderQuality(provider)
latency := t.getProviderLatency(provider)
// 过滤不满足基本条件的provider
if cost > maxCost || latency > maxLatency || quality < minQuality {
continue
}
// 计算综合评分
metrics := scoring.ProviderMetrics{
Name: name,
LatencyMs: latency,
Availability: 1.0, // 假设可用
CostPer1KTokens: cost,
QualityScore: quality,
}
score := t.scoringModel.CalculateScore(metrics)
candidates = append(candidates, candidate{
name: name,
cost: cost,
quality: quality,
latency: latency,
score: score,
})
}
if len(candidates) == 0 {
return nil, ErrNoQualifiedProvider
}
// 选择评分最高的provider
best := &candidates[0]
for i := 1; i < len(candidates); i++ {
if candidates[i].score > best.score {
best = &candidates[i]
}
}
return &RoutingDecision{
Provider: best.name,
Strategy: t.Type(),
CostPer1KTokens: best.cost,
EstimatedLatency: best.latency,
QualityScore: best.quality,
TakeoverMark: true, // M-008: 标记为接管
}, nil
}
// getProviderCost 获取Provider的成本
func (t *CostAwareTemplate) getProviderCost(provider adapter.ProviderAdapter) float64 {
if cp, ok := provider.(CostAwareProvider); ok {
return cp.GetCostPer1KTokens()
}
return 0.5
}
// getProviderQuality 获取Provider的质量分数
func (t *CostAwareTemplate) getProviderQuality(provider adapter.ProviderAdapter) float64 {
if qp, ok := provider.(QualityProvider); ok {
return qp.GetQualityScore()
}
return 0.8 // 默认质量分数
}
// getProviderLatency 获取Provider的延迟
func (t *CostAwareTemplate) getProviderLatency(provider adapter.ProviderAdapter) int64 {
if lp, ok := provider.(LatencyProvider); ok {
return lp.GetLatencyMs()
}
return 100 // 默认延迟100ms
}
// QualityProvider 质量感知Provider接口
type QualityProvider interface {
GetQualityScore() float64
}
// LatencyProvider 延迟感知Provider接口
type LatencyProvider interface {
GetLatencyMs() int64
}

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gateway/internal/router/strategy/cost_aware_test.go Normal file
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package strategy
import (
"context"
"testing"
"github.com/stretchr/testify/assert"
)
// TestCostAwareStrategy_Balance 测试成本感知策略的平衡选择
func TestCostAwareStrategy_Balance(t *testing.T) {
template := NewCostAwareTemplate("CostAware", CostAwareParams{
MaxCostPer1KTokens: 1.0,
MaxLatencyMs: 500,
MinQualityScore: 0.7,
})
// 注册多个providers
// ProviderA: 低成本, 低质量
template.providers["ProviderA"] = &MockProvider{
name: "ProviderA",
costPer1KTokens: 0.2,
available: true,
models: []string{"gpt-4"},
qualityScore: 0.6, // 质量不达标
latencyMs: 100,
}
// ProviderB: 中成本, 高质量, 低延迟
template.providers["ProviderB"] = &MockProvider{
name: "ProviderB",
costPer1KTokens: 0.5,
available: true,
models: []string{"gpt-4"},
qualityScore: 0.9,
latencyMs: 150,
}
// ProviderC: 高成本, 高质量, 高延迟
template.providers["ProviderC"] = &MockProvider{
name: "ProviderC",
costPer1KTokens: 0.9,
available: true,
models: []string{"gpt-4"},
qualityScore: 0.95,
latencyMs: 400,
}
req := &RoutingRequest{
Model: "gpt-4",
UserID: "user123",
MaxCost: 1.0,
MaxLatency: 500,
MinQuality: 0.7,
}
decision, err := template.SelectProvider(context.Background(), req)
// 验证选择逻辑
assert.NoError(t, err)
assert.NotNil(t, decision)
// ProviderA因质量不达标应被排除
// ProviderB应在成本/质量/延迟权衡中胜出
assert.Equal(t, "ProviderB", decision.Provider, "Should select balanced provider")
assert.GreaterOrEqual(t, decision.QualityScore, 0.7, "Quality should meet minimum")
assert.LessOrEqual(t, decision.CostPer1KTokens, 1.0, "Cost should be within budget")
assert.LessOrEqual(t, decision.EstimatedLatency, int64(500), "Latency should be within limit")
}
// TestCostAwareStrategy_QualityThreshold 测试质量阈值过滤
func TestCostAwareStrategy_QualityThreshold(t *testing.T) {
template := NewCostAwareTemplate("CostAware", CostAwareParams{
MaxCostPer1KTokens: 1.0,
MaxLatencyMs: 1000,
MinQualityScore: 0.9, // 高质量要求
})
// 所有provider质量都不达标
template.providers["ProviderA"] = &MockProvider{
name: "ProviderA",
costPer1KTokens: 0.3,
available: true,
models: []string{"gpt-4"},
qualityScore: 0.7,
latencyMs: 100,
}
template.providers["ProviderB"] = &MockProvider{
name: "ProviderB",
costPer1KTokens: 0.4,
available: true,
models: []string{"gpt-4"},
qualityScore: 0.8,
latencyMs: 150,
}
req := &RoutingRequest{
Model: "gpt-4",
UserID: "user123",
MinQuality: 0.9,
}
decision, err := template.SelectProvider(context.Background(), req)
// 应该返回错误，因为没有满足质量要求的provider
assert.Error(t, err)
assert.Nil(t, decision)
}

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gateway/internal/router/strategy/cost_based.go Normal file
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package strategy
import (
"context"
"errors"
"sort"
"lijiaoqiao/gateway/internal/adapter"
gwerror "lijiaoqiao/gateway/pkg/error"
)
// ErrNoAffordableProvider 没有可负担的Provider
var ErrNoAffordableProvider = errors.New("no affordable provider available")
// CostBasedTemplate 成本优先策略模板
// 选择成本最低的provider
type CostBasedTemplate struct {
name string
maxCostPer1KTokens float64
providers map[string]adapter.ProviderAdapter
}
// CostParams 成本参数
type CostParams struct {
// 最大成本 ($/1K tokens)
MaxCostPer1KTokens float64
}
// NewCostBasedTemplate 创建成本优先策略模板
func NewCostBasedTemplate(name string, params CostParams) *CostBasedTemplate {
return &CostBasedTemplate{
name: name,
maxCostPer1KTokens: params.MaxCostPer1KTokens,
providers: make(map[string]adapter.ProviderAdapter),
}
}
// RegisterProvider 注册Provider
func (t *CostBasedTemplate) RegisterProvider(name string, provider adapter.ProviderAdapter) {
t.providers[name] = provider
}
// Name 获取策略名称
func (t *CostBasedTemplate) Name() string {
return t.name
}
// Type 获取策略类型
func (t *CostBasedTemplate) Type() string {
return "cost_based"
}
// SelectProvider 选择成本最低的Provider
func (t *CostBasedTemplate) SelectProvider(ctx context.Context, req *RoutingRequest) (*RoutingDecision, error) {
if len(t.providers) == 0 {
return nil, gwerror.NewGatewayError(gwerror.ROUTER_NO_PROVIDER_AVAILABLE, "no provider registered")
}
// 收集所有可用provider的候选列表
type candidate struct {
name string
cost float64
}
var candidates []candidate
for name, provider := range t.providers {
// 检查provider是否支持该模型
supported := false
for _, m := range provider.SupportedModels() {
if m == req.Model || m == "*" {
supported = true
break
}
}
if !supported {
continue
}
// 检查健康状态
if !provider.HealthCheck(ctx) {
continue
}
// 获取成本信息 (实际实现需要从provider获取)
// 这里暂时设置为模拟值
cost := t.getProviderCost(provider)
candidates = append(candidates, candidate{name: name, cost: cost})
}
if len(candidates) == 0 {
return nil, gwerror.NewGatewayError(gwerror.ROUTER_NO_PROVIDER_AVAILABLE, "no available provider for model: "+req.Model)
}
// 按成本排序
sort.Slice(candidates, func(i, j int) bool {
return candidates[i].cost < candidates[j].cost
})
// 选择成本最低且在预算内的provider
maxCost := t.maxCostPer1KTokens
if req.MaxCost > 0 && req.MaxCost < maxCost {
maxCost = req.MaxCost
}
for _, c := range candidates {
if c.cost <= maxCost {
return &RoutingDecision{
Provider: c.name,
Strategy: t.Type(),
CostPer1KTokens: c.cost,
TakeoverMark: true, // M-008: 标记为接管
}, nil
}
}
return nil, ErrNoAffordableProvider
}
// CostAwareProvider 成本感知Provider接口
type CostAwareProvider interface {
GetCostPer1KTokens() float64
}
// getProviderCost 获取Provider的成本
func (t *CostBasedTemplate) getProviderCost(provider adapter.ProviderAdapter) float64 {
// 尝试类型断言获取成本
if cp, ok := provider.(CostAwareProvider); ok {
return cp.GetCostPer1KTokens()
}
// 默认返回0.5，实际应从provider元数据获取
return 0.5
}

142
gateway/internal/router/strategy/cost_based_test.go Normal file
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package strategy
import (
"context"
"testing"
"github.com/stretchr/testify/assert"
"lijiaoqiao/gateway/internal/adapter"
)
// TestCostBasedStrategy_SelectProvider 测试成本优先策略选择Provider
func TestCostBasedStrategy_SelectProvider(t *testing.T) {
template := &CostBasedTemplate{
name: "CostBased",
maxCostPer1KTokens: 1.0,
providers: make(map[string]adapter.ProviderAdapter),
}
// 注册mock providers
template.providers["ProviderA"] = &MockProvider{
name: "ProviderA",
costPer1KTokens: 0.5,
available: true,
models: []string{"gpt-4"},
}
template.providers["ProviderB"] = &MockProvider{
name: "ProviderB",
costPer1KTokens: 0.3, // 最低成本
available: true,
models: []string{"gpt-4"},
}
template.providers["ProviderC"] = &MockProvider{
name: "ProviderC",
costPer1KTokens: 0.8,
available: true,
models: []string{"gpt-4"},
}
req := &RoutingRequest{
Model: "gpt-4",
UserID: "user123",
MaxCost: 1.0,
}
decision, err := template.SelectProvider(context.Background(), req)
// 验证选择了最低成本的Provider
assert.NoError(t, err)
assert.NotNil(t, decision)
assert.Equal(t, "ProviderB", decision.Provider, "Should select lowest cost provider")
assert.LessOrEqual(t, decision.CostPer1KTokens, 1.0, "Cost should be within budget")
}
func TestCostBasedStrategy_Fallback(t *testing.T) {
// 成本超出阈值时fallback
template := &CostBasedTemplate{
name: "CostBased",
maxCostPer1KTokens: 0.5, // 设置低成本上限
providers: make(map[string]adapter.ProviderAdapter),
}
// 注册成本较高的providers
template.providers["ProviderA"] = &MockProvider{
name: "ProviderA",
costPer1KTokens: 0.8,
available: true,
models: []string{"gpt-4"},
}
template.providers["ProviderB"] = &MockProvider{
name: "ProviderB",
costPer1KTokens: 1.0,
available: true,
models: []string{"gpt-4"},
}
req := &RoutingRequest{
Model: "gpt-4",
UserID: "user123",
MaxCost: 0.5,
}
decision, err := template.SelectProvider(context.Background(), req)
// 应该返回错误
assert.Error(t, err, "Should return error when no affordable provider")
assert.Nil(t, decision, "Should not return decision when cost exceeds threshold")
assert.Equal(t, ErrNoAffordableProvider, err, "Should return ErrNoAffordableProvider")
}
// MockProvider 用于测试的Mock Provider
type MockProvider struct {
name string
costPer1KTokens float64
qualityScore float64
latencyMs int64
available bool
models []string
}
func (m *MockProvider) ChatCompletion(ctx context.Context, model string, messages []adapter.Message, options adapter.CompletionOptions) (*adapter.CompletionResponse, error) {
return nil, nil
}
func (m *MockProvider) ChatCompletionStream(ctx context.Context, model string, messages []adapter.Message, options adapter.CompletionOptions) (<-chan *adapter.StreamChunk, error) {
return nil, nil
}
func (m *MockProvider) GetUsage(response *adapter.CompletionResponse) adapter.Usage {
return adapter.Usage{}
}
func (m *MockProvider) MapError(err error) adapter.ProviderError {
return adapter.ProviderError{}
}
func (m *MockProvider) HealthCheck(ctx context.Context) bool {
return m.available
}
func (m *MockProvider) ProviderName() string {
return m.name
}
func (m *MockProvider) SupportedModels() []string {
return m.models
}
func (m *MockProvider) GetCostPer1KTokens() float64 {
return m.costPer1KTokens
}
func (m *MockProvider) GetQualityScore() float64 {
return m.qualityScore
}
func (m *MockProvider) GetLatencyMs() int64 {
return m.latencyMs
}
// Verify MockProvider implements adapter.ProviderAdapter
var _ adapter.ProviderAdapter = (*MockProvider)(nil)

78
gateway/internal/router/strategy/rollout.go Normal file
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package strategy
import (
"fmt"
"hash/fnv"
"sync"
)
// RolloutStrategy 灰度发布策略
type RolloutStrategy struct {
percentage int // 当前灰度百分比 (0-100)
bucketKey string // 分桶key
mu sync.RWMutex
}
// NewRolloutStrategy 创建灰度发布策略
func NewRolloutStrategy(percentage int, bucketKey string) *RolloutStrategy {
return &RolloutStrategy{
percentage: percentage,
bucketKey: bucketKey,
}
}
// SetPercentage 设置灰度百分比
func (r *RolloutStrategy) SetPercentage(percentage int) {
r.mu.Lock()
defer r.mu.Unlock()
if percentage < 0 {
percentage = 0
}
if percentage > 100 {
percentage = 100
}
r.percentage = percentage
}
// GetPercentage 获取当前灰度百分比
func (r *RolloutStrategy) GetPercentage() int {
r.mu.RLock()
defer r.mu.RUnlock()
return r.percentage
}
// ShouldApply 判断请求是否应该在灰度范围内
func (r *RolloutStrategy) ShouldApply(req *RoutingRequest) bool {
r.mu.RLock()
defer r.mu.RUnlock()
if r.percentage >= 100 {
return true
}
if r.percentage <= 0 {
return false
}
// 一致性哈希分桶
bucket := r.hashString(fmt.Sprintf("%s:%s", r.bucketKey, req.UserID)) % 100
return bucket < r.percentage
}
// hashString 计算字符串哈希值 (用于一致性分桶)
func (r *RolloutStrategy) hashString(s string) int {
h := fnv.New32a()
h.Write([]byte(s))
return int(h.Sum32())
}
// IncrementPercentage 增加灰度百分比
func (r *RolloutStrategy) IncrementPercentage(delta int) {
r.mu.Lock()
defer r.mu.Unlock()
r.percentage += delta
if r.percentage > 100 {
r.percentage = 100
}
}

65
gateway/internal/router/strategy/strategy_test.go Normal file
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package strategy
import (
"context"
"testing"
"github.com/stretchr/testify/assert"
"lijiaoqiao/gateway/internal/adapter"
)
// TestStrategyTemplate_Interface 验证策略模板接口
func TestStrategyTemplate_Interface(t *testing.T) {
// 所有策略实现必须实现SelectProvider, Name, Type方法
// 创建策略实现示例
costBased := &CostBasedTemplate{
name: "CostBased",
}
aware := &CostAwareTemplate{
name: "CostAware",
}
// 验证实现了StrategyTemplate接口
var _ StrategyTemplate = costBased
var _ StrategyTemplate = aware
// 验证方法
assert.Equal(t, "CostBased", costBased.Name())
assert.Equal(t, "cost_based", costBased.Type())
assert.Equal(t, "CostAware", aware.Name())
assert.Equal(t, "cost_aware", aware.Type())
}
// TestStrategyTemplate_SelectProvider_Signature 验证SelectProvider方法签名
func TestStrategyTemplate_SelectProvider_Signature(t *testing.T) {
req := &RoutingRequest{
Model: "gpt-4",
UserID: "user123",
TenantID: "tenant1",
MaxCost: 1.0,
MaxLatency: 1000,
}
// 验证返回值 - 创建一个有providers的模板
template := &CostBasedTemplate{
name: "test",
maxCostPer1KTokens: 1.0,
providers: make(map[string]adapter.ProviderAdapter),
}
template.providers["test"] = &MockProvider{
name: "test",
costPer1KTokens: 0.5,
available: true,
models: []string{"gpt-4"},
}
decision, err := template.SelectProvider(context.Background(), req)
// 接口实现应该返回决策或错误
assert.NotNil(t, decision)
assert.Nil(t, err)
}

40
gateway/internal/router/strategy/types.go Normal file
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package strategy
import (
"context"
)
// RoutingRequest 路由请求
type RoutingRequest struct {
Model string
UserID string
TenantID string
Region string
Messages []string
MaxCost float64
MaxLatency int64
MinQuality float64
}
// RoutingDecision 路由决策
type RoutingDecision struct {
Provider string
Strategy string
CostPer1KTokens float64
EstimatedLatency int64
QualityScore float64
TakeoverMark bool // M-008: 是否标记为接管
}
// StrategyTemplate 策略模板接口
// 所有路由策略都必须实现此接口
type StrategyTemplate interface {
// SelectProvider 选择最佳Provider
SelectProvider(ctx context.Context, req *RoutingRequest) (*RoutingDecision, error)
// Name 获取策略名称
Name() string
// Type 获取策略类型
Type() string
}