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test_harness.go
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test_harness.go
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package internal
import (
"fmt"
"net"
"os"
"os/signal"
"time"
"github.com/tendermint/tendermint/crypto/tmhash"
"github.com/tendermint/tendermint/crypto/ed25519"
"github.com/tendermint/tendermint/privval"
"github.com/tendermint/tendermint/state"
cmn "github.com/tendermint/tendermint/libs/common"
"github.com/tendermint/tendermint/libs/log"
"github.com/tendermint/tendermint/types"
)
// Test harness error codes (which act as exit codes when the test harness fails).
const (
NoError int = iota // 0
ErrInvalidParameters // 1
ErrMaxAcceptRetriesReached // 2
ErrFailedToLoadGenesisFile // 3
ErrFailedToCreateListener // 4
ErrFailedToStartListener // 5
ErrInterrupted // 6
ErrOther // 7
ErrTestPublicKeyFailed // 8
ErrTestSignProposalFailed // 9
ErrTestSignVoteFailed // 10
)
var voteTypes = []types.SignedMsgType{types.PrevoteType, types.PrecommitType}
// TestHarnessError allows us to keep track of which exit code should be used
// when exiting the main program.
type TestHarnessError struct {
Code int // The exit code to return
Err error // The original error
Info string // Any additional information
}
var _ error = (*TestHarnessError)(nil)
// TestHarness allows for testing of a remote signer to ensure compatibility
// with this version of Tendermint.
type TestHarness struct {
addr string
spv *privval.SignerValidatorEndpoint
fpv *privval.FilePV
chainID string
acceptRetries int
logger log.Logger
exitWhenComplete bool
exitCode int
}
// TestHarnessConfig provides configuration to set up a remote signer test
// harness.
type TestHarnessConfig struct {
BindAddr string
KeyFile string
StateFile string
GenesisFile string
AcceptDeadline time.Duration
ConnDeadline time.Duration
AcceptRetries int
SecretConnKey ed25519.PrivKeyEd25519
ExitWhenComplete bool // Whether or not to call os.Exit when the harness has completed.
}
// timeoutError can be used to check if an error returned from the netp package
// was due to a timeout.
type timeoutError interface {
Timeout() bool
}
// NewTestHarness will load Tendermint data from the given files (including
// validator public/private keypairs and chain details) and create a new
// harness.
func NewTestHarness(logger log.Logger, cfg TestHarnessConfig) (*TestHarness, error) {
keyFile := ExpandPath(cfg.KeyFile)
stateFile := ExpandPath(cfg.StateFile)
logger.Info("Loading private validator configuration", "keyFile", keyFile, "stateFile", stateFile)
// NOTE: LoadFilePV ultimately calls os.Exit on failure. No error will be
// returned if this call fails.
fpv := privval.LoadFilePV(keyFile, stateFile)
genesisFile := ExpandPath(cfg.GenesisFile)
logger.Info("Loading chain ID from genesis file", "genesisFile", genesisFile)
st, err := state.MakeGenesisDocFromFile(genesisFile)
if err != nil {
return nil, newTestHarnessError(ErrFailedToLoadGenesisFile, err, genesisFile)
}
logger.Info("Loaded genesis file", "chainID", st.ChainID)
spv, err := newTestHarnessSocketVal(logger, cfg)
if err != nil {
return nil, newTestHarnessError(ErrFailedToCreateListener, err, "")
}
return &TestHarness{
addr: cfg.BindAddr,
spv: spv,
fpv: fpv,
chainID: st.ChainID,
acceptRetries: cfg.AcceptRetries,
logger: logger,
exitWhenComplete: cfg.ExitWhenComplete,
exitCode: 0,
}, nil
}
// Run will execute the tests associated with this test harness. The intention
// here is to call this from one's `main` function, as the way it succeeds or
// fails at present is to call os.Exit() with an exit code related to the error
// that caused the tests to fail, or exit code 0 on success.
func (th *TestHarness) Run() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
go func() {
for sig := range c {
th.logger.Info("Caught interrupt, terminating...", "sig", sig)
th.Shutdown(newTestHarnessError(ErrInterrupted, nil, ""))
}
}()
th.logger.Info("Starting test harness")
accepted := false
var startErr error
for acceptRetries := th.acceptRetries; acceptRetries > 0; acceptRetries-- {
th.logger.Info("Attempting to accept incoming connection", "acceptRetries", acceptRetries)
if err := th.spv.Start(); err != nil {
// if it wasn't a timeout error
if _, ok := err.(timeoutError); !ok {
th.logger.Error("Failed to start listener", "err", err)
th.Shutdown(newTestHarnessError(ErrFailedToStartListener, err, ""))
// we need the return statements in case this is being run
// from a unit test - otherwise this function will just die
// when os.Exit is called
return
}
startErr = err
} else {
accepted = true
break
}
}
if !accepted {
th.logger.Error("Maximum accept retries reached", "acceptRetries", th.acceptRetries)
th.Shutdown(newTestHarnessError(ErrMaxAcceptRetriesReached, startErr, ""))
return
}
// Run the tests
if err := th.TestPublicKey(); err != nil {
th.Shutdown(err)
return
}
if err := th.TestSignProposal(); err != nil {
th.Shutdown(err)
return
}
if err := th.TestSignVote(); err != nil {
th.Shutdown(err)
return
}
th.logger.Info("SUCCESS! All tests passed.")
th.Shutdown(nil)
}
// TestPublicKey just validates that we can (1) fetch the public key from the
// remote signer, and (2) it matches the public key we've configured for our
// local Tendermint version.
func (th *TestHarness) TestPublicKey() error {
th.logger.Info("TEST: Public key of remote signer")
th.logger.Info("Local", "pubKey", th.fpv.GetPubKey())
th.logger.Info("Remote", "pubKey", th.spv.GetPubKey())
if th.fpv.GetPubKey() != th.spv.GetPubKey() {
th.logger.Error("FAILED: Local and remote public keys do not match")
return newTestHarnessError(ErrTestPublicKeyFailed, nil, "")
}
return nil
}
// TestSignProposal makes sure the remote signer can successfully sign
// proposals.
func (th *TestHarness) TestSignProposal() error {
th.logger.Info("TEST: Signing of proposals")
// sha256 hash of "hash"
hash := tmhash.Sum([]byte("hash"))
prop := &types.Proposal{
Type: types.ProposalType,
Height: 12345,
Round: 23456,
POLRound: -1,
BlockID: types.BlockID{
Hash: hash,
PartsHeader: types.PartSetHeader{
Hash: hash,
Total: 1000000,
},
},
Timestamp: time.Now(),
}
propBytes := prop.SignBytes(th.chainID)
if err := th.spv.SignProposal(th.chainID, prop); err != nil {
th.logger.Error("FAILED: Signing of proposal", "err", err)
return newTestHarnessError(ErrTestSignProposalFailed, err, "")
}
th.logger.Debug("Signed proposal", "prop", prop)
// first check that it's a basically valid proposal
if err := prop.ValidateBasic(); err != nil {
th.logger.Error("FAILED: Signed proposal is invalid", "err", err)
return newTestHarnessError(ErrTestSignProposalFailed, err, "")
}
// now validate the signature on the proposal
if th.spv.GetPubKey().VerifyBytes(propBytes, prop.Signature) {
th.logger.Info("Successfully validated proposal signature")
} else {
th.logger.Error("FAILED: Proposal signature validation failed")
return newTestHarnessError(ErrTestSignProposalFailed, nil, "signature validation failed")
}
return nil
}
// TestSignVote makes sure the remote signer can successfully sign all kinds of
// votes.
func (th *TestHarness) TestSignVote() error {
th.logger.Info("TEST: Signing of votes")
for _, voteType := range voteTypes {
th.logger.Info("Testing vote type", "type", voteType)
hash := tmhash.Sum([]byte("hash"))
vote := &types.Vote{
Type: voteType,
Height: 12345,
Round: 23456,
BlockID: types.BlockID{
Hash: hash,
PartsHeader: types.PartSetHeader{
Hash: hash,
Total: 1000000,
},
},
ValidatorIndex: 0,
ValidatorAddress: tmhash.SumTruncated([]byte("addr")),
Timestamp: time.Now(),
}
voteBytes := vote.SignBytes(th.chainID)
// sign the vote
if err := th.spv.SignVote(th.chainID, vote); err != nil {
th.logger.Error("FAILED: Signing of vote", "err", err)
return newTestHarnessError(ErrTestSignVoteFailed, err, fmt.Sprintf("voteType=%d", voteType))
}
th.logger.Debug("Signed vote", "vote", vote)
// validate the contents of the vote
if err := vote.ValidateBasic(); err != nil {
th.logger.Error("FAILED: Signed vote is invalid", "err", err)
return newTestHarnessError(ErrTestSignVoteFailed, err, fmt.Sprintf("voteType=%d", voteType))
}
// now validate the signature on the proposal
if th.spv.GetPubKey().VerifyBytes(voteBytes, vote.Signature) {
th.logger.Info("Successfully validated vote signature", "type", voteType)
} else {
th.logger.Error("FAILED: Vote signature validation failed", "type", voteType)
return newTestHarnessError(ErrTestSignVoteFailed, nil, "signature validation failed")
}
}
return nil
}
// Shutdown will kill the test harness and attempt to close all open sockets
// gracefully. If the supplied error is nil, it is assumed that the exit code
// should be 0. If err is not nil, it will exit with an exit code related to the
// error.
func (th *TestHarness) Shutdown(err error) {
var exitCode int
if err == nil {
exitCode = NoError
} else if therr, ok := err.(*TestHarnessError); ok {
exitCode = therr.Code
} else {
exitCode = ErrOther
}
th.exitCode = exitCode
// in case sc.Stop() takes too long
if th.exitWhenComplete {
go func() {
time.Sleep(time.Duration(5) * time.Second)
th.logger.Error("Forcibly exiting program after timeout")
os.Exit(exitCode)
}()
}
if th.spv.IsRunning() {
if err := th.spv.Stop(); err != nil {
th.logger.Error("Failed to cleanly stop listener: %s", err.Error())
}
}
if th.exitWhenComplete {
os.Exit(exitCode)
}
}
// newTestHarnessSocketVal creates our client instance which we will use for
// testing.
func newTestHarnessSocketVal(logger log.Logger, cfg TestHarnessConfig) (*privval.SignerValidatorEndpoint, error) {
proto, addr := cmn.ProtocolAndAddress(cfg.BindAddr)
if proto == "unix" {
// make sure the socket doesn't exist - if so, try to delete it
if cmn.FileExists(addr) {
if err := os.Remove(addr); err != nil {
logger.Error("Failed to remove existing Unix domain socket", "addr", addr)
return nil, err
}
}
}
ln, err := net.Listen(proto, addr)
if err != nil {
return nil, err
}
logger.Info("Listening at", "proto", proto, "addr", addr)
var svln net.Listener
switch proto {
case "unix":
unixLn := privval.NewUnixListener(ln)
privval.UnixListenerTimeoutAccept(cfg.AcceptDeadline)(unixLn)
privval.UnixListenerTimeoutReadWrite(cfg.ConnDeadline)(unixLn)
svln = unixLn
case "tcp":
tcpLn := privval.NewTCPListener(ln, cfg.SecretConnKey)
privval.TCPListenerTimeoutAccept(cfg.AcceptDeadline)(tcpLn)
privval.TCPListenerTimeoutReadWrite(cfg.ConnDeadline)(tcpLn)
logger.Info("Resolved TCP address for listener", "addr", tcpLn.Addr())
svln = tcpLn
default:
logger.Error("Unsupported protocol (must be unix:// or tcp://)", "proto", proto)
return nil, newTestHarnessError(ErrInvalidParameters, nil, fmt.Sprintf("Unsupported protocol: %s", proto))
}
return privval.NewSignerValidatorEndpoint(logger, svln), nil
}
func newTestHarnessError(code int, err error, info string) *TestHarnessError {
return &TestHarnessError{
Code: code,
Err: err,
Info: info,
}
}
func (e *TestHarnessError) Error() string {
var msg string
switch e.Code {
case ErrInvalidParameters:
msg = "Invalid parameters supplied to application"
case ErrMaxAcceptRetriesReached:
msg = "Maximum accept retries reached"
case ErrFailedToLoadGenesisFile:
msg = "Failed to load genesis file"
case ErrFailedToCreateListener:
msg = "Failed to create listener"
case ErrFailedToStartListener:
msg = "Failed to start listener"
case ErrInterrupted:
msg = "Interrupted"
case ErrTestPublicKeyFailed:
msg = "Public key validation test failed"
case ErrTestSignProposalFailed:
msg = "Proposal signing validation test failed"
case ErrTestSignVoteFailed:
msg = "Vote signing validation test failed"
default:
msg = "Unknown error"
}
if len(e.Info) > 0 {
msg = fmt.Sprintf("%s: %s", msg, e.Info)
}
if e.Err != nil {
msg = fmt.Sprintf("%s (original error: %s)", msg, e.Err.Error())
}
return msg
}