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// SPDX-License-Identifier: CC0-1.0
package grpc_testing
//go:generate protoc --go_out=. --go-grpc_out=. echo.proto
import (
"context"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"go.awhk.org/pipeln"
)
type impl struct{ UnimplementedEchoServer }
var _ EchoServer = impl{}
func (impl) Echo(_ context.Context, req *EchoRequest) (*EchoResponse, error) {
return &EchoResponse{Message: req.Message}, nil
}
func Test(t *testing.T) {
ln := pipeln.New("test-backend-name")
ret := make(chan error)
srv := grpc.NewServer()
RegisterEchoServer(srv, &impl{})
go func() { ret <- srv.Serve(ln) }()
opts := []grpc.DialOption{grpc.WithContextDialer(ln.DialContextAddr), grpc.WithInsecure()}
req := &EchoRequest{Message: "Hello World!"}
t.Run("OK", func(t *testing.T) {
conn, err := grpc.Dial("test-backend-name", opts...)
require.NoError(t, err)
defer conn.Close()
client := NewEchoClient(conn)
resp, err := client.Echo(context.Background(), req)
require.NoError(t, err)
assert.Equal(t, req.Message, resp.Message)
})
t.Run("Address Mismatch", func(t *testing.T) {
conn, err := grpc.Dial("bad-backend-name", opts...)
require.NoError(t, err)
defer conn.Close()
client := NewEchoClient(conn)
_, err = client.Echo(context.Background(), req)
require.Error(t, err)
st := status.Convert(err)
require.NotNil(t, st)
assert.Equal(t, codes.Unavailable, st.Code())
assert.Contains(t, st.Message(), "invalid argument")
})
srv.GracefulStop()
assert.NoError(t, <-ret)
t.Run("Remote Connection Closed", func(t *testing.T) {
conn, err := grpc.Dial("test-backend-name", opts...)
require.NoError(t, err)
defer conn.Close()
client := NewEchoClient(conn)
_, err = client.Echo(context.Background(), req)
require.Error(t, err)
st := status.Convert(err)
require.NotNil(t, st)
assert.Equal(t, codes.Unavailable, st.Code())
assert.Contains(t, st.Message(), "connection refused")
})
}
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