open-nomad/client/testutil/rpc.go
2023-04-10 15:36:59 +00:00

90 lines
2 KiB
Go

// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package testutil
import (
"fmt"
"io"
"net"
"strings"
"testing"
"time"
"github.com/hashicorp/go-msgpack/codec"
cstructs "github.com/hashicorp/nomad/client/structs"
"github.com/hashicorp/nomad/nomad/structs"
"github.com/stretchr/testify/require"
)
// StreamingRPC may be satisfied by client.Client or server.Server.
type StreamingRPC interface {
StreamingRpcHandler(method string) (structs.StreamingRpcHandler, error)
}
// StreamingRPCErrorTestCase is a test case to be passed to the
// assertStreamingRPCError func.
type StreamingRPCErrorTestCase struct {
Name string
RPC string
Req interface{}
Assert func(error) bool
}
// AssertStreamingRPCError asserts a streaming RPC's error matches the given
// assertion in the test case.
func AssertStreamingRPCError(t *testing.T, s StreamingRPC, tc StreamingRPCErrorTestCase) {
handler, err := s.StreamingRpcHandler(tc.RPC)
require.NoError(t, err)
// Create a pipe
p1, p2 := net.Pipe()
defer p1.Close()
defer p2.Close()
errCh := make(chan error, 1)
streamMsg := make(chan *cstructs.StreamErrWrapper, 1)
// Start the handler
go handler(p2)
// Start the decoder
go func() {
decoder := codec.NewDecoder(p1, structs.MsgpackHandle)
for {
var msg cstructs.StreamErrWrapper
if err := decoder.Decode(&msg); err != nil {
if err == io.EOF || strings.Contains(err.Error(), "closed") {
return
}
errCh <- fmt.Errorf("error decoding: %v", err)
}
streamMsg <- &msg
}
}()
// Send the request
encoder := codec.NewEncoder(p1, structs.MsgpackHandle)
require.NoError(t, encoder.Encode(tc.Req))
timeout := time.After(5 * time.Second)
for {
select {
case <-timeout:
t.Fatal("timeout")
case err := <-errCh:
require.NoError(t, err)
case msg := <-streamMsg:
// Convert RpcError to error
var err error
if msg.Error != nil {
err = msg.Error
}
require.True(t, tc.Assert(err), "(%T) %s", msg.Error, msg.Error)
return
}
}
}