da36506b89
P0 fixes: - ModelError.Is(): use exact matching instead of substring contains() - shouldClearStickySession: add context param for cancellation/tracing P1 fixes: - TODO stubs: return 501 Not Implemented errors - validateInstanceSignature: deduplicate to shared validateCodeSignature() - Error messages: standardize to English only - http.go: remove pseudo if-else with duplicate branches
83 lines
2.4 KiB
Go
83 lines
2.4 KiB
Go
package repository
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import (
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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// --- Task 6.1 验证: math/rand/v2 迁移后 jitteredTTL 行为正确 ---
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func TestJitteredTTL_WithinExpectedRange(t *testing.T) {
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// jitteredTTL 使用减法抖动: billingCacheTTL - [0, billingCacheJitter)
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// 所以结果应在 [billingCacheTTL - billingCacheJitter, billingCacheTTL] 范围内
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lowerBound := billingCacheTTL - billingCacheJitter // 5min - 30s = 4min30s
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upperBound := billingCacheTTL // 5min
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for i := 0; i < 200; i++ {
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ttl := jitteredTTL()
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assert.GreaterOrEqual(t, int64(ttl), int64(lowerBound),
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"TTL 不应低于 %v，实际得到 %v", lowerBound, ttl)
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assert.LessOrEqual(t, int64(ttl), int64(upperBound),
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"TTL 不应超过 %v（上界不变保证），实际得到 %v", upperBound, ttl)
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}
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}
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func TestJitteredTTL_NeverExceedsBase(t *testing.T) {
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// 关键安全性测试：jitteredTTL 使用减法抖动，确保永远不超过 billingCacheTTL
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for i := 0; i < 500; i++ {
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ttl := jitteredTTL()
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assert.LessOrEqual(t, int64(ttl), int64(billingCacheTTL),
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"jitteredTTL 不应超过基础 TTL（上界预期不被打破）")
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}
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}
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func TestJitteredTTL_HasVariance(t *testing.T) {
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// 验证抖动确实产生了不同的值
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results := make(map[time.Duration]bool)
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for i := 0; i < 100; i++ {
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ttl := jitteredTTL()
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results[ttl] = true
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}
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require.Greater(t, len(results), 1,
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"jitteredTTL 应产生不同的值（抖动生效），但 100 次调用结果全部相同")
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}
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func TestJitteredTTL_AverageNearCenter(t *testing.T) {
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// 验证平均值大约在抖动范围中间
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var sum time.Duration
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runs := 1000
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for i := 0; i < runs; i++ {
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sum += jitteredTTL()
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}
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avg := sum / time.Duration(runs)
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expectedCenter := billingCacheTTL - billingCacheJitter/2 // 4min45s
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// 允许 ±5s 的误差
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tolerance := 5 * time.Second
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assert.InDelta(t, float64(expectedCenter), float64(avg), float64(tolerance),
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"平均 TTL 应接近抖动范围中心 %v", expectedCenter)
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}
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func TestBillingKeyGeneration(t *testing.T) {
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t.Run("balance_key", func(t *testing.T) {
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key := billingBalanceKey(12345)
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assert.Equal(t, "billing:balance:12345", key)
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})
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t.Run("sub_key", func(t *testing.T) {
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key := billingSubKey(100, 200)
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assert.Equal(t, "billing:sub:100:200", key)
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})
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}
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func BenchmarkJitteredTTL(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_ = jitteredTTL()
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}
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}
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