storj/pkg/kademlia/kademlia_test.go
2018-10-16 14:11:39 -04:00

400 lines
9.0 KiB
Go

// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.
// See LICENSE for copying information.
package kademlia
import (
"context"
"net"
"os"
"testing"
"github.com/golang/protobuf/proto"
"github.com/stretchr/testify/assert"
"google.golang.org/grpc"
"storj.io/storj/pkg/dht"
"storj.io/storj/pkg/node"
"storj.io/storj/pkg/pb"
"storj.io/storj/pkg/provider"
)
// helper function to get kademlia base configs without root Config struct
func kadconfig() KadConfig {
return KadConfig{
Alpha: 5,
DefaultIDLength: 256,
DefaultBucketSize: 20,
DefaultReplacementCacheSize: 5,
}
}
// helper function to generate new node identities with
// correct difficulty and concurrency
func newTestIdentity() (*provider.FullIdentity, error) {
fid, err := node.NewFullIdentity(context.Background(), 12, 4)
return fid, err
}
func TestNewKademlia(t *testing.T) {
cases := []struct {
id dht.NodeID
bn []pb.Node
addr string
expectedErr error
setup func() error
}{
{
id: func() *node.ID {
id, err := newTestIdentity()
assert.NoError(t, err)
n := node.ID(id.ID)
return &n
}(),
bn: []pb.Node{pb.Node{Id: "foo"}},
addr: "127.0.0.1:8080",
setup: func() error { return nil },
},
{
id: func() *node.ID {
id, err := newTestIdentity()
assert.NoError(t, err)
n := node.ID(id.ID)
return &n
}(),
bn: []pb.Node{pb.Node{Id: "foo"}},
addr: "127.0.0.1:8080",
setup: func() error { return os.RemoveAll("db") },
},
}
for _, v := range cases {
assert.NoError(t, v.setup())
kc := kadconfig()
ca, err := provider.NewCA(context.Background(), 12, 4)
assert.NoError(t, err)
identity, err := ca.NewIdentity()
assert.NoError(t, err)
actual, err := NewKademlia(v.id, v.bn, v.addr, identity, "db", kc)
assert.Equal(t, v.expectedErr, err)
assert.Equal(t, actual.bootstrapNodes, v.bn)
assert.NotNil(t, actual.nodeClient)
assert.NotNil(t, actual.routingTable)
}
}
func TestLookup(t *testing.T) {
lis, err := net.Listen("tcp", "127.0.0.1:0")
addr := lis.Addr().String()
assert.NoError(t, err)
kc := kadconfig()
srv, mns := newTestServer([]*pb.Node{&pb.Node{Id: "foo"}})
go func() { _ = srv.Serve(lis) }()
defer srv.Stop()
k := func() *Kademlia {
// make new identity
fid, err := newTestIdentity()
assert.NoError(t, err)
fid2, err := newTestIdentity()
assert.NoError(t, err)
// create two new unique identities
id := node.ID(fid.ID)
id2 := node.ID(fid2.ID)
assert.NotEqual(t, id, id2)
kid := dht.NodeID(fid.ID)
k, err := NewKademlia(kid, []pb.Node{pb.Node{Id: id2.String(), Address: &pb.NodeAddress{Address: lis.Addr().String()}}}, lis.Addr().String(), fid, "db", kc)
assert.NoError(t, err)
return k
}()
cases := []struct {
k *Kademlia
target dht.NodeID
opts lookupOpts
expected *pb.Node
expectedErr error
}{
{
k: k,
target: func() *node.ID {
fid, err := newTestIdentity()
id := dht.NodeID(fid.ID)
nid := node.ID(fid.ID)
assert.NoError(t, err)
mns.returnValue = []*pb.Node{&pb.Node{Id: id.String(), Address: &pb.NodeAddress{Address: addr}}}
return &nid
}(),
opts: lookupOpts{amount: 5},
expected: &pb.Node{},
expectedErr: nil,
},
{
k: k,
target: func() *node.ID {
id, err := newTestIdentity()
assert.NoError(t, err)
n := node.ID(id.ID)
return &n
}(),
opts: lookupOpts{amount: 5},
expected: nil,
expectedErr: nil,
},
}
for _, v := range cases {
err := v.k.lookup(context.Background(), v.target, v.opts)
assert.Equal(t, v.expectedErr, err)
}
}
func TestBootstrap(t *testing.T) {
bn, s := testNode(t, []pb.Node{})
defer s.Stop()
n1, s1 := testNode(t, []pb.Node{*bn.routingTable.self})
defer s1.Stop()
err := n1.Bootstrap(context.Background())
assert.NoError(t, err)
n2, s2 := testNode(t, []pb.Node{*bn.routingTable.self})
defer s2.Stop()
err = n2.Bootstrap(context.Background())
assert.NoError(t, err)
nodeIDs, err := n2.routingTable.nodeBucketDB.List(nil, 0)
assert.NoError(t, err)
assert.Len(t, nodeIDs, 3)
}
func testNode(t *testing.T, bn []pb.Node) (*Kademlia, *grpc.Server) {
// new address
lis, err := net.Listen("tcp", "127.0.0.1:0")
assert.NoError(t, err)
// new config
kc := kadconfig()
// new identity
fid, err := newTestIdentity()
id := dht.NodeID(fid.ID)
assert.NoError(t, err)
// new kademlia
k, err := NewKademlia(id, bn, lis.Addr().String(), fid, "db", kc)
assert.NoError(t, err)
s := node.NewServer(k)
// new ident opts
identOpt, err := fid.ServerOption()
assert.NoError(t, err)
grpcServer := grpc.NewServer(identOpt)
pb.RegisterNodesServer(grpcServer, s)
go func() { _ = grpcServer.Serve(lis) }()
return k, grpcServer
}
func TestGetNodes(t *testing.T) {
lis, err := net.Listen("tcp", "127.0.0.1:0")
assert.NoError(t, err)
kc := kadconfig()
srv, _ := newTestServer([]*pb.Node{&pb.Node{Id: "foo"}})
go func() { _ = srv.Serve(lis) }()
defer srv.Stop()
// make new identity
fid, err := newTestIdentity()
assert.NoError(t, err)
fid2, err := newTestIdentity()
assert.NoError(t, err)
fid.ID = "AAAAA"
fid2.ID = "BBBBB"
// create two new unique identities
id := node.ID(fid.ID)
id2 := node.ID(fid2.ID)
assert.NotEqual(t, id, id2)
kid := dht.NodeID(fid.ID)
k, err := NewKademlia(kid, []pb.Node{pb.Node{Id: id2.String(), Address: &pb.NodeAddress{Address: lis.Addr().String()}}}, lis.Addr().String(), fid, "db", kc)
assert.NoError(t, err)
// add nodes
ids := []string{"AAAAA", "BBBBB", "CCCCC", "DDDDD"}
bw := []int64{1, 2, 3, 4}
disk := []int64{4, 3, 2, 1}
nodes := []*pb.Node{}
for i, v := range ids {
n := &pb.Node{
Id: v,
Restrictions: &pb.NodeRestrictions{
FreeBandwidth: bw[i],
FreeDisk: disk[i],
},
}
nodes = append(nodes, n)
err = k.routingTable.ConnectionSuccess(n)
assert.NoError(t, err)
}
cases := []struct {
testID string
start string
limit int
restrictions []pb.Restriction
expected []*pb.Node
}{
{testID: "one",
start: "BBBBB",
limit: 2,
restrictions: []pb.Restriction{
pb.Restriction{
Operator: pb.Restriction_GT,
Operand: pb.Restriction_freeBandwidth,
Value: int64(2),
},
},
expected: nodes[2:],
},
{testID: "two",
start: "AAAAA",
limit: 3,
restrictions: []pb.Restriction{
pb.Restriction{
Operator: pb.Restriction_GT,
Operand: pb.Restriction_freeBandwidth,
Value: int64(2),
},
pb.Restriction{
Operator: pb.Restriction_LT,
Operand: pb.Restriction_freeDisk,
Value: int64(2),
},
},
expected: nodes[3:],
},
{testID: "three",
start: "AAAAA",
limit: 4,
restrictions: []pb.Restriction{},
expected: nodes,
},
}
for _, c := range cases {
t.Run(c.testID, func(t *testing.T) {
ns, err := k.GetNodes(context.Background(), c.start, c.limit, c.restrictions...)
assert.NoError(t, err)
assert.Equal(t, len(c.expected), len(ns))
for i, n := range ns {
assert.True(t, proto.Equal(c.expected[i], n))
}
})
}
}
func TestMeetsRestrictions(t *testing.T) {
cases := []struct {
testID string
r []pb.Restriction
n pb.Node
expect bool
}{
{testID: "pass one",
r: []pb.Restriction{
pb.Restriction{
Operator: pb.Restriction_EQ,
Operand: pb.Restriction_freeBandwidth,
Value: int64(1),
},
},
n: pb.Node{
Restrictions: &pb.NodeRestrictions{
FreeBandwidth: int64(1),
},
},
expect: true,
},
{testID: "pass multiple",
r: []pb.Restriction{
pb.Restriction{
Operator: pb.Restriction_LTE,
Operand: pb.Restriction_freeBandwidth,
Value: int64(2),
},
pb.Restriction{
Operator: pb.Restriction_GTE,
Operand: pb.Restriction_freeDisk,
Value: int64(2),
},
},
n: pb.Node{
Restrictions: &pb.NodeRestrictions{
FreeBandwidth: int64(1),
FreeDisk: int64(3),
},
},
expect: true,
},
{testID: "fail one",
r: []pb.Restriction{
pb.Restriction{
Operator: pb.Restriction_LT,
Operand: pb.Restriction_freeBandwidth,
Value: int64(2),
},
pb.Restriction{
Operator: pb.Restriction_GT,
Operand: pb.Restriction_freeDisk,
Value: int64(2),
},
},
n: pb.Node{
Restrictions: &pb.NodeRestrictions{
FreeBandwidth: int64(2),
FreeDisk: int64(3),
},
},
expect: false,
},
{testID: "fail multiple",
r: []pb.Restriction{
pb.Restriction{
Operator: pb.Restriction_LT,
Operand: pb.Restriction_freeBandwidth,
Value: int64(2),
},
pb.Restriction{
Operator: pb.Restriction_GT,
Operand: pb.Restriction_freeDisk,
Value: int64(2),
},
},
n: pb.Node{
Restrictions: &pb.NodeRestrictions{
FreeBandwidth: int64(2),
FreeDisk: int64(2),
},
},
expect: false,
},
}
for _, c := range cases {
t.Run(c.testID, func(t *testing.T) {
result := meetsRestrictions(c.r, c.n)
assert.Equal(t, c.expect, result)
})
}
}