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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package rand_test
import (
. "math/rand/v2"
"sync"
"testing"
)
// TestConcurrent exercises the rand API concurrently, triggering situations
// where the race detector is likely to detect issues.
func TestConcurrent(t *testing.T) {
const (
numRoutines = 10
numCycles = 10
)
var wg sync.WaitGroup
defer wg.Wait()
wg.Add(numRoutines)
for i := 0; i < numRoutines; i++ {
go func(i int) {
defer wg.Done()
var seed int64
for j := 0; j < numCycles; j++ {
seed += int64(ExpFloat64())
seed += int64(Float32())
seed += int64(Float64())
seed += int64(IntN(Int()))
seed += int64(Int32N(Int32()))
seed += int64(Int64N(Int64()))
seed += int64(NormFloat64())
seed += int64(Uint32())
seed += int64(Uint64())
for _, p := range Perm(10) {
seed += int64(p)
}
}
_ = seed
}(i)
}
}
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