storj/pkg/kademlia/queue_test.go

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// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.
package kademlia
import (
"container/heap"
"math/big"
"testing"
"github.com/stretchr/testify/assert"
"storj.io/storj/pkg/pb"
)
func TestPriorityQueue(t *testing.T) {
cases := []struct {
target *big.Int
nodes map[string]*pb.Node
pq PriorityQueue
expected []int
}{
{
target: func() *big.Int {
i, ok := new(big.Int).SetString("0001", 2)
assert.True(t, ok)
return i
}(),
nodes: map[string]*pb.Node{
"1001": &pb.Node{Id: "1001"},
"0100": &pb.Node{Id: "0100"},
"1100": &pb.Node{Id: "1100"},
"0010": &pb.Node{Id: "0010"},
},
pq: make(PriorityQueue, 4),
expected: []int{3, 5, 8, 13},
},
}
for _, v := range cases {
i := 0
for id, value := range v.nodes {
bn, ok := new(big.Int).SetString(id, 2)
assert.True(t, ok)
v.pq[i] = &Item{
value: value,
priority: new(big.Int).Xor(v.target, bn),
index: i,
}
i++
}
heap.Init(&v.pq)
i = 0
for v.pq.Len() > 0 {
item := heap.Pop(&v.pq).(*Item)
assert.Equal(t, big.NewInt(int64(v.expected[i])), item.priority)
i++
}
}
}