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|
package praefect
import (
"context"
"fmt"
"net"
"testing"
"time"
"github.com/golang/protobuf/proto"
"github.com/stretchr/testify/require"
"gitlab.com/gitlab-org/gitaly/client"
"gitlab.com/gitlab-org/gitaly/internal/log"
"gitlab.com/gitlab-org/gitaly/internal/praefect/config"
"gitlab.com/gitlab-org/gitaly/internal/praefect/grpc-proxy/proxy"
"gitlab.com/gitlab-org/gitaly/internal/praefect/mock"
"gitlab.com/gitlab-org/gitaly/internal/praefect/models"
"gitlab.com/gitlab-org/gitaly/internal/praefect/protoregistry"
"google.golang.org/grpc"
)
// TestServerSimpleUnaryUnary verifies that the Praefect server is capable of
// routing a specific unary request to and unary response from a backend server
func TestServerSimpleUnaryUnary(t *testing.T) {
testCases := []struct {
name string
// callback is the actual RPC implementation
callback simpleUnaryUnaryCallback
// all inputs and outputs for RPC SimpleUnaryUnary
request *mock.SimpleRequest
expectResp *mock.SimpleResponse
expectErrStr string
}{
{
name: "simple request with response",
callback: callbackIncrement,
request: &mock.SimpleRequest{
Value: 1,
},
expectResp: &mock.SimpleResponse{
Value: 2,
},
},
}
gz := proto.FileDescriptor("mock.proto")
fd, err := protoregistry.ExtractFileDescriptor(gz)
if err != nil {
panic(err)
}
for _, tt := range testCases {
t.Run(tt.name, func(t *testing.T) {
const (
storagePrimary = "default"
)
conf := config.Config{
Nodes: []*models.Node{
&models.Node{
ID: 1,
Storage: "praefect-internal-1",
DefaultPrimary: true,
},
&models.Node{
ID: 2,
Storage: "praefect-internal-2",
}},
}
datastore := NewMemoryDatastore(conf)
logEntry := log.Default()
coordinator := NewCoordinator(logEntry, datastore, fd)
for id, nodeStorage := range datastore.storageNodes.m {
backend, cleanup := newMockDownstream(t, tt.callback)
defer cleanup() // clean up mock downstream server resources
coordinator.RegisterNode(nodeStorage.Storage, backend)
nodeStorage.Address = backend
datastore.storageNodes.m[id] = nodeStorage
}
replmgr := NewReplMgr(
storagePrimary,
logEntry,
datastore,
coordinator,
)
prf := NewServer(
coordinator,
datastore,
replmgr,
nil,
logEntry,
conf,
)
listener, port := listenAvailPort(t)
t.Logf("proxy listening on port %d", port)
defer listener.Close()
errQ := make(chan error)
go func() {
errQ <- prf.Start(listener)
}()
// dial client to praefect
cc := dialLocalPort(t, port, false)
defer cc.Close()
cli := mock.NewSimpleServiceClient(cc)
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
resp, err := cli.SimpleUnaryUnary(ctx, tt.request)
if err != nil {
require.EqualError(t, err, tt.expectErrStr)
}
require.Equal(t, tt.expectResp, resp)
err = prf.Shutdown(ctx)
require.NoError(t, err)
require.NoError(t, <-errQ)
})
}
}
func callbackIncrement(_ context.Context, req *mock.SimpleRequest) (*mock.SimpleResponse, error) {
return &mock.SimpleResponse{
Value: req.Value + 1,
}, nil
}
func listenAvailPort(tb testing.TB) (net.Listener, int) {
listener, err := net.Listen("tcp", ":0")
require.NoError(tb, err)
return listener, listener.Addr().(*net.TCPAddr).Port
}
func dialLocalPort(tb testing.TB, port int, backend bool) *grpc.ClientConn {
opts := []grpc.DialOption{
grpc.WithBlock(),
}
if backend {
opts = append(
opts,
grpc.WithDefaultCallOptions(grpc.CallCustomCodec(proxy.Codec())),
)
}
cc, err := client.Dial(
fmt.Sprintf("tcp://localhost:%d", port),
opts,
)
require.NoError(tb, err)
return cc
}
// initializes and returns a client to downstream server, downstream server, and cleanup function
func newMockDownstream(tb testing.TB, callback simpleUnaryUnaryCallback) (string, func()) {
// setup mock server
m := &mockSvc{
simpleUnaryUnary: callback,
}
srv := grpc.NewServer()
mock.RegisterSimpleServiceServer(srv, m)
// client to backend service
lis, port := listenAvailPort(tb)
errQ := make(chan error)
go func() {
errQ <- srv.Serve(lis)
}()
cleanup := func() {
srv.GracefulStop()
lis.Close()
// If the server is shutdown before Serve() is called on it
// the Serve() calls will return the ErrServerStopped
if err := <-errQ; err != nil && err != grpc.ErrServerStopped {
require.NoError(tb, err)
}
}
return fmt.Sprintf("tcp://localhost:%d", port), cleanup
}
|
