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315 lines
8.4 KiB
315 lines
8.4 KiB
package conn
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import (
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"net"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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wire "github.com/tendermint/go-wire"
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"github.com/tendermint/tmlibs/log"
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)
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func createTestMConnection(conn net.Conn) *MConnection {
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onReceive := func(chID byte, msgBytes []byte) {
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}
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onError := func(r interface{}) {
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}
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c := createMConnectionWithCallbacks(conn, onReceive, onError)
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c.SetLogger(log.TestingLogger())
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return c
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}
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func createMConnectionWithCallbacks(conn net.Conn, onReceive func(chID byte, msgBytes []byte), onError func(r interface{})) *MConnection {
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chDescs := []*ChannelDescriptor{&ChannelDescriptor{ID: 0x01, Priority: 1, SendQueueCapacity: 1}}
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c := NewMConnection(conn, chDescs, onReceive, onError)
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c.SetLogger(log.TestingLogger())
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return c
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}
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func TestMConnectionSend(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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server, client := NetPipe()
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defer server.Close() // nolint: errcheck
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defer client.Close() // nolint: errcheck
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mconn := createTestMConnection(client)
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err := mconn.Start()
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require.Nil(err)
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defer mconn.Stop()
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msg := "Ant-Man"
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assert.True(mconn.Send(0x01, msg))
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// Note: subsequent Send/TrySend calls could pass because we are reading from
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// the send queue in a separate goroutine.
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_, err = server.Read(make([]byte, len(msg)))
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if err != nil {
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t.Error(err)
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}
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assert.True(mconn.CanSend(0x01))
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msg = "Spider-Man"
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assert.True(mconn.TrySend(0x01, msg))
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_, err = server.Read(make([]byte, len(msg)))
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if err != nil {
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t.Error(err)
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}
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assert.False(mconn.CanSend(0x05), "CanSend should return false because channel is unknown")
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assert.False(mconn.Send(0x05, "Absorbing Man"), "Send should return false because channel is unknown")
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}
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func TestMConnectionReceive(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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server, client := NetPipe()
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defer server.Close() // nolint: errcheck
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defer client.Close() // nolint: errcheck
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receivedCh := make(chan []byte)
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errorsCh := make(chan interface{})
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onReceive := func(chID byte, msgBytes []byte) {
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receivedCh <- msgBytes
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}
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onError := func(r interface{}) {
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errorsCh <- r
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}
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mconn1 := createMConnectionWithCallbacks(client, onReceive, onError)
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err := mconn1.Start()
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require.Nil(err)
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defer mconn1.Stop()
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mconn2 := createTestMConnection(server)
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err = mconn2.Start()
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require.Nil(err)
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defer mconn2.Stop()
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msg := "Cyclops"
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assert.True(mconn2.Send(0x01, msg))
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select {
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case receivedBytes := <-receivedCh:
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assert.Equal([]byte(msg), receivedBytes[2:]) // first 3 bytes are internal
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case err := <-errorsCh:
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t.Fatalf("Expected %s, got %+v", msg, err)
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case <-time.After(500 * time.Millisecond):
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t.Fatalf("Did not receive %s message in 500ms", msg)
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}
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}
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func TestMConnectionStatus(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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server, client := NetPipe()
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defer server.Close() // nolint: errcheck
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defer client.Close() // nolint: errcheck
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mconn := createTestMConnection(client)
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err := mconn.Start()
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require.Nil(err)
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defer mconn.Stop()
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status := mconn.Status()
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assert.NotNil(status)
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assert.Zero(status.Channels[0].SendQueueSize)
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}
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func TestMConnectionStopsAndReturnsError(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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server, client := NetPipe()
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defer server.Close() // nolint: errcheck
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defer client.Close() // nolint: errcheck
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receivedCh := make(chan []byte)
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errorsCh := make(chan interface{})
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onReceive := func(chID byte, msgBytes []byte) {
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receivedCh <- msgBytes
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}
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onError := func(r interface{}) {
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errorsCh <- r
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}
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mconn := createMConnectionWithCallbacks(client, onReceive, onError)
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err := mconn.Start()
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require.Nil(err)
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defer mconn.Stop()
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if err := client.Close(); err != nil {
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t.Error(err)
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}
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select {
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case receivedBytes := <-receivedCh:
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t.Fatalf("Expected error, got %v", receivedBytes)
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case err := <-errorsCh:
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assert.NotNil(err)
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assert.False(mconn.IsRunning())
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case <-time.After(500 * time.Millisecond):
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t.Fatal("Did not receive error in 500ms")
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}
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}
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func newClientAndServerConnsForReadErrors(require *require.Assertions, chOnErr chan struct{}) (*MConnection, *MConnection) {
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server, client := NetPipe()
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onReceive := func(chID byte, msgBytes []byte) {}
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onError := func(r interface{}) {}
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// create client conn with two channels
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chDescs := []*ChannelDescriptor{
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{ID: 0x01, Priority: 1, SendQueueCapacity: 1},
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{ID: 0x02, Priority: 1, SendQueueCapacity: 1},
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}
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mconnClient := NewMConnection(client, chDescs, onReceive, onError)
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mconnClient.SetLogger(log.TestingLogger().With("module", "client"))
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err := mconnClient.Start()
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require.Nil(err)
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// create server conn with 1 channel
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// it fires on chOnErr when there's an error
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serverLogger := log.TestingLogger().With("module", "server")
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onError = func(r interface{}) {
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chOnErr <- struct{}{}
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}
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mconnServer := createMConnectionWithCallbacks(server, onReceive, onError)
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mconnServer.SetLogger(serverLogger)
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err = mconnServer.Start()
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require.Nil(err)
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return mconnClient, mconnServer
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}
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func expectSend(ch chan struct{}) bool {
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after := time.After(time.Second * 5)
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select {
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case <-ch:
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return true
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case <-after:
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return false
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}
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}
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func TestMConnectionReadErrorBadEncoding(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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chOnErr := make(chan struct{})
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mconnClient, mconnServer := newClientAndServerConnsForReadErrors(require, chOnErr)
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defer mconnClient.Stop()
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defer mconnServer.Stop()
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client := mconnClient.conn
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msg := "Ant-Man"
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// send badly encoded msgPacket
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var n int
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var err error
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wire.WriteByte(packetTypeMsg, client, &n, &err)
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wire.WriteByteSlice([]byte(msg), client, &n, &err)
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assert.True(expectSend(chOnErr), "badly encoded msgPacket")
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}
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func TestMConnectionReadErrorUnknownChannel(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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chOnErr := make(chan struct{})
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mconnClient, mconnServer := newClientAndServerConnsForReadErrors(require, chOnErr)
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defer mconnClient.Stop()
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defer mconnServer.Stop()
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msg := "Ant-Man"
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// fail to send msg on channel unknown by client
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assert.False(mconnClient.Send(0x03, msg))
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// send msg on channel unknown by the server.
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// should cause an error
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assert.True(mconnClient.Send(0x02, msg))
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assert.True(expectSend(chOnErr), "unknown channel")
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}
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func TestMConnectionReadErrorLongMessage(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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chOnErr := make(chan struct{})
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chOnRcv := make(chan struct{})
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mconnClient, mconnServer := newClientAndServerConnsForReadErrors(require, chOnErr)
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defer mconnClient.Stop()
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defer mconnServer.Stop()
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mconnServer.onReceive = func(chID byte, msgBytes []byte) {
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chOnRcv <- struct{}{}
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}
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client := mconnClient.conn
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// send msg thats just right
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var n int
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var err error
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packet := msgPacket{
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ChannelID: 0x01,
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Bytes: make([]byte, mconnClient.config.maxMsgPacketTotalSize()-5),
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EOF: 1,
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}
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writeMsgPacketTo(packet, client, &n, &err)
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assert.True(expectSend(chOnRcv), "msg just right")
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// send msg thats too long
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packet = msgPacket{
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ChannelID: 0x01,
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Bytes: make([]byte, mconnClient.config.maxMsgPacketTotalSize()-4),
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EOF: 1,
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}
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writeMsgPacketTo(packet, client, &n, &err)
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assert.True(expectSend(chOnErr), "msg too long")
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}
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func TestMConnectionReadErrorUnknownMsgType(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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chOnErr := make(chan struct{})
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mconnClient, mconnServer := newClientAndServerConnsForReadErrors(require, chOnErr)
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defer mconnClient.Stop()
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defer mconnServer.Stop()
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// send msg with unknown msg type
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var n int
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var err error
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wire.WriteByte(0x04, mconnClient.conn, &n, &err)
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assert.True(expectSend(chOnErr), "unknown msg type")
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}
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func TestMConnectionTrySend(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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server, client := NetPipe()
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defer server.Close()
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defer client.Close()
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mconn := createTestMConnection(client)
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err := mconn.Start()
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require.Nil(err)
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defer mconn.Stop()
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msg := "Semicolon-Woman"
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resultCh := make(chan string, 2)
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assert.True(mconn.TrySend(0x01, msg))
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server.Read(make([]byte, len(msg)))
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assert.True(mconn.CanSend(0x01))
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assert.True(mconn.TrySend(0x01, msg))
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assert.False(mconn.CanSend(0x01))
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go func() {
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mconn.TrySend(0x01, msg)
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resultCh <- "TrySend"
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}()
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go func() {
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mconn.Send(0x01, msg)
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resultCh <- "Send"
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}()
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assert.False(mconn.CanSend(0x01))
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assert.False(mconn.TrySend(0x01, msg))
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assert.Equal("TrySend", <-resultCh)
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server.Read(make([]byte, len(msg)))
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assert.Equal("Send", <-resultCh) // Order constrained by parallel blocking above
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}
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