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// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package whisperv5

import (
    "bytes"
    "encoding/json"
    "testing"
    "time"

    "github.com/ethereum/go-ethereum/common"
)

func TestBasic(t *testing.T) {
    var id string = "test"
    w := New()
    api := NewPublicWhisperAPI(w)
    if api == nil {
        t.Fatalf("failed to create API.")
    }

    ver, err := api.Version()
    if err != nil {
        t.Fatalf("failed generateFilter: %s.", err)
    }

    if uint64(ver) != ProtocolVersion {
        t.Fatalf("wrong version: %d.", ver)
    }

    mail := api.GetFilterChanges("non-existent-id")
    if len(mail) != 0 {
        t.Fatalf("failed GetFilterChanges: premature result")
    }

    exist, err := api.HasIdentity(id)
    if err != nil {
        t.Fatalf("failed initial HasIdentity: %s.", err)
    }
    if exist {
        t.Fatalf("failed initial HasIdentity: false positive.")
    }

    err = api.DeleteIdentity(id)
    if err != nil {
        t.Fatalf("failed DeleteIdentity: %s.", err)
    }

    pub, err := api.NewIdentity()
    if err != nil {
        t.Fatalf("failed NewIdentity: %s.", err)
    }
    if len(pub) == 0 {
        t.Fatalf("failed NewIdentity: empty")
    }

    exist, err = api.HasIdentity(pub)
    if err != nil {
        t.Fatalf("failed HasIdentity: %s.", err)
    }
    if !exist {
        t.Fatalf("failed HasIdentity: false negative.")
    }

    err = api.DeleteIdentity(pub)
    if err != nil {
        t.Fatalf("failed to delete second identity: %s.", err)
    }

    exist, err = api.HasIdentity(pub)
    if err != nil {
        t.Fatalf("failed HasIdentity(): %s.", err)
    }
    if exist {
        t.Fatalf("failed HasIdentity(): false positive.")
    }

    id = "arbitrary text"
    id2 := "another arbitrary string"

    exist, err = api.HasSymKey(id)
    if err != nil {
        t.Fatalf("failed HasSymKey: %s.", err)
    }
    if exist {
        t.Fatalf("failed HasSymKey: false positive.")
    }

    err = api.GenerateSymKey(id)
    if err != nil {
        t.Fatalf("failed GenerateSymKey: %s.", err)
    }

    exist, err = api.HasSymKey(id)
    if err != nil {
        t.Fatalf("failed HasSymKey(): %s.", err)
    }
    if !exist {
        t.Fatalf("failed HasSymKey(): false negative.")
    }

    err = api.AddSymKey(id, []byte("some stuff here"))
    if err == nil {
        t.Fatalf("failed AddSymKey: %s.", err)
    }

    err = api.AddSymKey(id2, []byte("some stuff here"))
    if err != nil {
        t.Fatalf("failed AddSymKey: %s.", err)
    }

    exist, err = api.HasSymKey(id2)
    if err != nil {
        t.Fatalf("failed HasSymKey(id2): %s.", err)
    }
    if !exist {
        t.Fatalf("failed HasSymKey(id2): false negative.")
    }

    err = api.DeleteSymKey(id)
    if err != nil {
        t.Fatalf("failed DeleteSymKey(id): %s.", err)
    }

    exist, err = api.HasSymKey(id)
    if err != nil {
        t.Fatalf("failed HasSymKey(id): %s.", err)
    }
    if exist {
        t.Fatalf("failed HasSymKey(id): false positive.")
    }
}

func TestUnmarshalFilterArgs(t *testing.T) {
    s := []byte(`{
    "to":"0x70c87d191324e6712a591f304b4eedef6ad9bb9d",
    "from":"0x9b2055d370f73ec7d8a03e965129118dc8f5bf83",
    "keyname":"testname",
    "pow":2.34,
    "topics":["0x00000000", "0x007f80ff", "0xff807f00", "0xf26e7779"],
    "p2p":true
    }`)

    var f WhisperFilterArgs
    err := f.UnmarshalJSON(s)
    if err != nil {
        t.Fatalf("failed UnmarshalJSON: %s.", err)
    }

    if f.To != "0x70c87d191324e6712a591f304b4eedef6ad9bb9d" {
        t.Fatalf("wrong To: %x.", f.To)
    }
    if f.From != "0x9b2055d370f73ec7d8a03e965129118dc8f5bf83" {
        t.Fatalf("wrong From: %x.", f.To)
    }
    if f.KeyName != "testname" {
        t.Fatalf("wrong KeyName: %s.", f.KeyName)
    }
    if f.PoW != 2.34 {
        t.Fatalf("wrong pow: %f.", f.PoW)
    }
    if !f.AcceptP2P {
        t.Fatalf("wrong AcceptP2P: %v.", f.AcceptP2P)
    }
    if len(f.Topics) != 4 {
        t.Fatalf("wrong topics number: %d.", len(f.Topics))
    }

    i := 0
    if f.Topics[i] != (TopicType{0x00, 0x00, 0x00, 0x00}) {
        t.Fatalf("wrong topic[%d]: %x.", i, f.Topics[i])
    }

    i++
    if f.Topics[i] != (TopicType{0x00, 0x7f, 0x80, 0xff}) {
        t.Fatalf("wrong topic[%d]: %x.", i, f.Topics[i])
    }

    i++
    if f.Topics[i] != (TopicType{0xff, 0x80, 0x7f, 0x00}) {
        t.Fatalf("wrong topic[%d]: %x.", i, f.Topics[i])
    }

    i++
    if f.Topics[i] != (TopicType{0xf2, 0x6e, 0x77, 0x79}) {
        t.Fatalf("wrong topic[%d]: %x.", i, f.Topics[i])
    }
}

func TestUnmarshalPostArgs(t *testing.T) {
    s := []byte(`{
    "ttl":12345,
    "from":"0x70c87d191324e6712a591f304b4eedef6ad9bb9d",
    "to":"0x9b2055d370f73ec7d8a03e965129118dc8f5bf83",
    "keyname":"shh_test",
    "topic":"0xf26e7779",
    "padding":"0x74686973206973206D79207465737420737472696E67",
    "payload":"0x7061796C6F61642073686F756C642062652070736575646F72616E646F6D",
    "worktime":777,
    "pow":3.1416,
    "filterid":"test-filter-id",
    "peerid":"0xf26e7779"
    }`)

    var a PostArgs
    err := json.Unmarshal(s, &a)
    if err != nil {
        t.Fatalf("failed UnmarshalJSON: %s.", err)
    }

    if a.TTL != 12345 {
        t.Fatalf("wrong ttl: %d.", a.TTL)
    }
    if a.From != "0x70c87d191324e6712a591f304b4eedef6ad9bb9d" {
        t.Fatalf("wrong From: %x.", a.To)
    }
    if a.To != "0x9b2055d370f73ec7d8a03e965129118dc8f5bf83" {
        t.Fatalf("wrong To: %x.", a.To)
    }
    if a.KeyName != "shh_test" {
        t.Fatalf("wrong KeyName: %s.", a.KeyName)
    }
    if a.Topic != (TopicType{0xf2, 0x6e, 0x77, 0x79}) {
        t.Fatalf("wrong topic: %x.", a.Topic)
    }
    if string(a.Padding) != "this is my test string" {
        t.Fatalf("wrong Padding: %s.", string(a.Padding))
    }
    if string(a.Payload) != "payload should be pseudorandom" {
        t.Fatalf("wrong Payload: %s.", string(a.Payload))
    }
    if a.WorkTime != 777 {
        t.Fatalf("wrong WorkTime: %d.", a.WorkTime)
    }
    if a.PoW != 3.1416 {
        t.Fatalf("wrong pow: %f.", a.PoW)
    }
    if a.FilterID != "test-filter-id" {
        t.Fatalf("wrong FilterID: %s.", a.FilterID)
    }
    if !bytes.Equal(a.PeerID[:], a.Topic[:]) {
        t.Fatalf("wrong PeerID: %x.", a.PeerID)
    }
}

func waitForMessage(api *PublicWhisperAPI, id string, target int) bool {
    for i := 0; i < 64; i++ {
        all := api.GetMessages(id)
        if len(all) >= target {
            return true
        }
        time.Sleep(time.Millisecond * 16)
    }

    // timeout 1024 milliseconds
    return false
}

func TestIntegrationAsym(t *testing.T) {
    w := New()
    api := NewPublicWhisperAPI(w)
    if api == nil {
        t.Fatalf("failed to create API.")
    }

    api.Start()
    defer api.Stop()

    sig, err := api.NewIdentity()
    if err != nil {
        t.Fatalf("failed NewIdentity: %s.", err)
    }
    if len(sig) == 0 {
        t.Fatalf("wrong signature")
    }

    exist, err := api.HasIdentity(sig)
    if err != nil {
        t.Fatalf("failed HasIdentity: %s.", err)
    }
    if !exist {
        t.Fatalf("failed HasIdentity: false negative.")
    }

    key, err := api.NewIdentity()
    if err != nil {
        t.Fatalf("failed NewIdentity(): %s.", err)
    }
    if len(key) == 0 {
        t.Fatalf("wrong key")
    }

    var topics [2]TopicType
    topics[0] = TopicType{0x00, 0x64, 0x00, 0xff}
    topics[1] = TopicType{0xf2, 0x6e, 0x77, 0x79}
    var f WhisperFilterArgs
    f.To = key
    f.From = sig
    f.Topics = topics[:]
    f.PoW = MinimumPoW / 2
    f.AcceptP2P = true

    id, err := api.NewFilter(f)
    if err != nil {
        t.Fatalf("failed to create new filter: %s.", err)
    }

    var p PostArgs
    p.TTL = 2
    p.From = f.From
    p.To = f.To
    p.Padding = []byte("test string")
    p.Payload = []byte("extended test string")
    p.PoW = MinimumPoW
    p.Topic = TopicType{0xf2, 0x6e, 0x77, 0x79}
    p.WorkTime = 2

    err = api.Post(p)
    if err != nil {
        t.Errorf("failed to post message: %s.", err)
    }

    ok := waitForMessage(api, id, 1)
    if !ok {
        t.Fatalf("failed to receive first message: timeout.")
    }

    mail := api.GetFilterChanges(id)
    if len(mail) != 1 {
        t.Fatalf("failed to GetFilterChanges: got %d messages.", len(mail))
    }

    text := string(common.FromHex(mail[0].Payload))
    if text != string("extended test string") {
        t.Fatalf("failed to decrypt first message: %s.", text)
    }

    p.Padding = []byte("new value")
    p.Payload = []byte("extended new value")
    err = api.Post(p)
    if err != nil {
        t.Fatalf("failed to post next message: %s.", err)
    }

    ok = waitForMessage(api, id, 2)
    if !ok {
        t.Fatalf("failed to receive second message: timeout.")
    }

    mail = api.GetFilterChanges(id)
    if len(mail) != 1 {
        t.Fatalf("failed to GetFilterChanges: got %d messages.", len(mail))
    }

    text = string(common.FromHex(mail[0].Payload))
    if text != string("extended new value") {
        t.Fatalf("failed to decrypt second message: %s.", text)
    }
}

func TestIntegrationSym(t *testing.T) {
    w := New()
    api := NewPublicWhisperAPI(w)
    if api == nil {
        t.Fatalf("failed to create API.")
    }

    api.Start()
    defer api.Stop()

    keyname := "schluessel"
    err := api.GenerateSymKey(keyname)
    if err != nil {
        t.Fatalf("failed GenerateSymKey: %s.", err)
    }

    sig, err := api.NewIdentity()
    if err != nil {
        t.Fatalf("failed NewIdentity: %s.", err)
    }
    if len(sig) == 0 {
        t.Fatalf("wrong signature")
    }

    exist, err := api.HasIdentity(sig)
    if err != nil {
        t.Fatalf("failed HasIdentity: %s.", err)
    }
    if !exist {
        t.Fatalf("failed HasIdentity: false negative.")
    }

    var topics [2]TopicType
    topics[0] = TopicType{0x00, 0x7f, 0x80, 0xff}
    topics[1] = TopicType{0xf2, 0x6e, 0x77, 0x79}
    var f WhisperFilterArgs
    f.KeyName = keyname
    f.Topics = topics[:]
    f.PoW = 0.324
    f.From = sig
    f.AcceptP2P = false

    id, err := api.NewFilter(f)
    if err != nil {
        t.Fatalf("failed to create new filter: %s.", err)
    }

    var p PostArgs
    p.TTL = 1
    p.KeyName = keyname
    p.From = f.From
    p.Padding = []byte("test string")
    p.Payload = []byte("extended test string")
    p.PoW = MinimumPoW
    p.Topic = TopicType{0xf2, 0x6e, 0x77, 0x79}
    p.WorkTime = 2

    err = api.Post(p)
    if err != nil {
        t.Fatalf("failed to post first message: %s.", err)
    }

    ok := waitForMessage(api, id, 1)
    if !ok {
        t.Fatalf("failed to receive first message: timeout.")
    }

    mail := api.GetFilterChanges(id)
    if len(mail) != 1 {
        t.Fatalf("failed GetFilterChanges: got %d messages.", len(mail))
    }

    text := string(common.FromHex(mail[0].Payload))
    if text != string("extended test string") {
        t.Fatalf("failed to decrypt first message: %s.", text)
    }

    p.Padding = []byte("new value")
    p.Payload = []byte("extended new value")
    err = api.Post(p)
    if err != nil {
        t.Fatalf("failed to post second message: %s.", err)
    }

    ok = waitForMessage(api, id, 2)
    if !ok {
        t.Fatalf("failed to receive second message: timeout.")
    }

    mail = api.GetFilterChanges(id)
    if len(mail) != 1 {
        t.Fatalf("failed second GetFilterChanges: got %d messages.", len(mail))
    }

    text = string(common.FromHex(mail[0].Payload))
    if text != string("extended new value") {
        t.Fatalf("failed to decrypt second message: %s.", text)
    }
}

func TestIntegrationSymWithFilter(t *testing.T) {
    w := New()
    api := NewPublicWhisperAPI(w)
    if api == nil {
        t.Fatalf("failed to create API.")
    }

    api.Start()
    defer api.Stop()

    keyname := "schluessel"
    err := api.GenerateSymKey(keyname)
    if err != nil {
        t.Fatalf("failed to GenerateSymKey: %s.", err)
    }

    sig, err := api.NewIdentity()
    if err != nil {
        t.Fatalf("failed NewIdentity: %s.", err)
    }
    if len(sig) == 0 {
        t.Fatalf("wrong signature.")
    }

    exist, err := api.HasIdentity(sig)
    if err != nil {
        t.Fatalf("failed HasIdentity: %s.", err)
    }
    if !exist {
        t.Fatalf("failed HasIdentity: does not exist.")
    }

    var topics [2]TopicType
    topics[0] = TopicType{0x00, 0x7f, 0x80, 0xff}
    topics[1] = TopicType{0xf2, 0x6e, 0x77, 0x79}
    var f WhisperFilterArgs
    f.KeyName = keyname
    f.Topics = topics[:]
    f.PoW = 0.324
    f.From = sig
    f.AcceptP2P = false

    id, err := api.NewFilter(f)
    if err != nil {
        t.Fatalf("failed to create new filter: %s.", err)
    }

    var p PostArgs
    p.TTL = 1
    p.FilterID = id
    p.From = sig
    p.Padding = []byte("test string")
    p.Payload = []byte("extended test string")
    p.PoW = MinimumPoW
    p.Topic = TopicType{0xf2, 0x6e, 0x77, 0x79}
    p.WorkTime = 2

    err = api.Post(p)
    if err != nil {
        t.Fatalf("failed to post message: %s.", err)
    }

    ok := waitForMessage(api, id, 1)
    if !ok {
        t.Fatalf("failed to receive first message: timeout.")
    }

    mail := api.GetFilterChanges(id)
    if len(mail) != 1 {
        t.Fatalf("failed to GetFilterChanges: got %d messages.", len(mail))
    }

    text := string(common.FromHex(mail[0].Payload))
    if text != string("extended test string") {
        t.Fatalf("failed to decrypt first message: %s.", text)
    }

    p.Padding = []byte("new value")
    p.Payload = []byte("extended new value")
    err = api.Post(p)
    if err != nil {
        t.Fatalf("failed to post next message: %s.", err)
    }

    ok = waitForMessage(api, id, 2)
    if !ok {
        t.Fatalf("failed to receive second message: timeout.")
    }

    mail = api.GetFilterChanges(id)
    if len(mail) != 1 {
        t.Fatalf("failed to GetFilterChanges: got %d messages.", len(mail))
    }

    text = string(common.FromHex(mail[0].Payload))
    if text != string("extended new value") {
        t.Fatalf("failed to decrypt second message: %s.", text)
    }
}