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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 fuzzer
import (
"testing"
"github.com/stretchr/testify/assert"
"golang.org/x/sync/errgroup"
)
func TestPriority(t *testing.T) {
assert.True(t, priority{1, 2}.greaterThan(priority{1, 1}))
assert.True(t, priority{3, 2}.greaterThan(priority{2, 3}))
assert.True(t, priority{1, -5}.greaterThan(priority{1, -10}))
assert.True(t, priority{1}.greaterThan(priority{1, -1}))
assert.False(t, priority{1}.greaterThan(priority{1, 1}))
}
func TestPrioQueueOrder(t *testing.T) {
pq := makePriorityQueue[int]()
assert.Nil(t, pq.tryPop())
pq.push(&priorityQueueItem[int]{value: 1, prio: priority{1}})
pq.push(&priorityQueueItem[int]{value: 3, prio: priority{3}})
pq.push(&priorityQueueItem[int]{value: 2, prio: priority{2}})
assert.Equal(t, 3, pq.tryPop().value)
assert.Equal(t, 2, pq.tryPop().value)
assert.Equal(t, 1, pq.tryPop().value)
assert.Nil(t, pq.tryPop())
assert.Zero(t, pq.Len())
}
func TestPrioQueueRace(t *testing.T) {
var eg errgroup.Group
pq := makePriorityQueue[int]()
// Two writers.
for writer := 0; writer < 2; writer++ {
eg.Go(func() error {
for i := 0; i < 1000; i++ {
pq.push(&priorityQueueItem[int]{value: 10, prio: priority{1}})
}
return nil
})
}
// Two readers.
for reader := 0; reader < 2; reader++ {
eg.Go(func() error {
for i := 0; i < 1000; i++ {
pq.tryPop()
}
return nil
})
}
eg.Wait()
}
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