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// Copyright 2024 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package queue
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestDistributor(t *testing.T) {
q := Plain()
dist := Distribute(q)
req := &Request{}
q.Submit(req)
assert.Equal(t, req, dist.Next(0))
q.Submit(req)
assert.Equal(t, req, dist.Next(1))
// Avoid VM 0.
req.Avoid = []ExecutorID{{VM: 0}}
q.Submit(req)
var noReq *Request
assert.Equal(t, noReq, dist.Next(0))
assert.Equal(t, noReq, dist.Next(0))
assert.Equal(t, req, dist.Next(1))
// If only VM 0 queries requests, it should eventually got it.
q.Submit(req)
assert.Equal(t, noReq, dist.Next(0))
for {
got := dist.Next(0)
if got == req {
break
}
assert.Equal(t, noReq, got)
}
// If all active VMs are in the avoid set, then they should get
// the request immidiatly.
assert.Equal(t, noReq, dist.Next(1))
req.Avoid = []ExecutorID{{VM: 0}, {VM: 1}}
q.Submit(req)
assert.Equal(t, req, dist.Next(1))
}
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