path: root/dex/nodetable_test.go

package dex

import (
    "math/rand"
    "testing"
    "time"

    "github.com/dexon-foundation/dexon/common"
    "github.com/dexon-foundation/dexon/p2p/enode"
)

func TestNodeTable(t *testing.T) {
    table := newNodeTable()
    ch := make(chan newMetasEvent)
    table.SubscribeNewMetasEvent(ch)

    metas1 := []*NodeMeta{
        &NodeMeta{ID: randomID()},
        &NodeMeta{ID: randomID()},
    }

    metas2 := []*NodeMeta{
        &NodeMeta{ID: randomID()},
        &NodeMeta{ID: randomID()},
    }

    go table.Add(metas1)

    select {
    case newMetas := <-ch:
        m := map[common.Hash]struct{}{}
        for _, meta := range newMetas.Metas {
            m[meta.Hash()] = struct{}{}
        }

        if len(m) != len(metas1) {
            t.Errorf("len mismatch: got %d, want: %d",
                len(m), len(metas1))
        }

        for _, meta := range metas1 {
            if _, ok := m[meta.Hash()]; !ok {
                t.Errorf("expected meta (%s) not exists", meta.Hash())
            }
        }
    case <-time.After(1 * time.Second):
        t.Error("did not receive new metas event within one second")
    }

    go table.Add(metas2)
    select {
    case newMetas := <-ch:
        m := map[common.Hash]struct{}{}
        for _, meta := range newMetas.Metas {
            m[meta.Hash()] = struct{}{}
        }

        if len(m) != len(metas1) {
            t.Errorf("len mismatch: got %d, want: %d",
                len(m), len(metas2))
        }

        for _, meta := range metas2 {
            if _, ok := m[meta.Hash()]; !ok {
                t.Errorf("expected meta (%s) not exists", meta.Hash())
            }
        }
    case <-time.After(1 * time.Second):
        t.Error("did not receive new metas event within one second")
    }

    var metas []*NodeMeta
    metas = append(metas, metas1...)
    metas = append(metas, metas2...)
    allMetas := table.Metas()
    if len(allMetas) != len(metas) {
        t.Errorf("all metas num mismatch: got %d, want %d",
            len(metas), len(allMetas))
    }

    for _, m := range metas {
        if m.Hash() != table.Get(m.ID).Hash() {
            t.Errorf("meta (%s) mismatch", m.ID.String())
        }
    }
}

func randomID() (id enode.ID) {
    for i := range id {
        id[i] = byte(rand.Intn(255))
    }
    return id
}