110 lines
2.8 KiB
Go
110 lines
2.8 KiB
Go
//go:build unit
|
|
|
|
package antigravity
|
|
|
|
import (
|
|
"sync"
|
|
"sync/atomic"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
// --- Task 7: 验证 generateRandomID 和降级碰撞防护 ---
|
|
|
|
func TestGenerateRandomID_Uniqueness(t *testing.T) {
|
|
seen := make(map[string]struct{}, 100)
|
|
for i := 0; i < 100; i++ {
|
|
id := generateRandomID()
|
|
require.Len(t, id, 12, "ID 长度应为 12")
|
|
_, dup := seen[id]
|
|
require.False(t, dup, "第 %d 次调用生成了重复 ID: %s", i, id)
|
|
seen[id] = struct{}{}
|
|
}
|
|
}
|
|
|
|
func TestFallbackCounter_Increments(t *testing.T) {
|
|
// 验证 fallbackCounter 的原子递增行为确保降级分支不会生成相同 seed
|
|
before := atomic.LoadUint64(&fallbackCounter)
|
|
cnt1 := atomic.AddUint64(&fallbackCounter, 1)
|
|
cnt2 := atomic.AddUint64(&fallbackCounter, 1)
|
|
require.Equal(t, before+1, cnt1, "第一次递增应为 before+1")
|
|
require.Equal(t, before+2, cnt2, "第二次递增应为 before+2")
|
|
require.NotEqual(t, cnt1, cnt2, "连续两次递增的计数器值应不同")
|
|
}
|
|
|
|
func TestFallbackCounter_ConcurrentIncrements(t *testing.T) {
|
|
// 验证并发递增的原子性 — 每次递增都应产生唯一值
|
|
const goroutines = 50
|
|
results := make([]uint64, goroutines)
|
|
var wg sync.WaitGroup
|
|
wg.Add(goroutines)
|
|
|
|
for i := 0; i < goroutines; i++ {
|
|
go func(idx int) {
|
|
defer wg.Done()
|
|
results[idx] = atomic.AddUint64(&fallbackCounter, 1)
|
|
}(i)
|
|
}
|
|
wg.Wait()
|
|
|
|
// 所有结果应唯一
|
|
seen := make(map[uint64]bool, goroutines)
|
|
for _, v := range results {
|
|
assert.False(t, seen[v], "并发递增产生了重复值: %d", v)
|
|
seen[v] = true
|
|
}
|
|
}
|
|
|
|
func TestGenerateRandomID_Charset(t *testing.T) {
|
|
const validChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
|
|
validSet := make(map[byte]struct{}, len(validChars))
|
|
for i := 0; i < len(validChars); i++ {
|
|
validSet[validChars[i]] = struct{}{}
|
|
}
|
|
|
|
for i := 0; i < 50; i++ {
|
|
id := generateRandomID()
|
|
for j := 0; j < len(id); j++ {
|
|
_, ok := validSet[id[j]]
|
|
require.True(t, ok, "ID 包含非法字符: %c (ID=%s)", id[j], id)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestGenerateRandomID_Length(t *testing.T) {
|
|
for i := 0; i < 100; i++ {
|
|
id := generateRandomID()
|
|
assert.Len(t, id, 12, "每次生成的 ID 长度应为 12")
|
|
}
|
|
}
|
|
|
|
func TestGenerateRandomID_ConcurrentUniqueness(t *testing.T) {
|
|
// 验证并发调用不会产生重复 ID
|
|
const goroutines = 100
|
|
results := make([]string, goroutines)
|
|
var wg sync.WaitGroup
|
|
wg.Add(goroutines)
|
|
|
|
for i := 0; i < goroutines; i++ {
|
|
go func(idx int) {
|
|
defer wg.Done()
|
|
results[idx] = generateRandomID()
|
|
}(i)
|
|
}
|
|
wg.Wait()
|
|
|
|
seen := make(map[string]bool, goroutines)
|
|
for _, id := range results {
|
|
assert.False(t, seen[id], "并发调用产生了重复 ID: %s", id)
|
|
seen[id] = true
|
|
}
|
|
}
|
|
|
|
func BenchmarkGenerateRandomID(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
_ = generateRandomID()
|
|
}
|
|
}
|