1// Copyright 2020 Google LLC
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     https://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package testutil
16
17import (
18	"context"
19
20	"github.com/golang/protobuf/proto"
21	instancepb "google.golang.org/genproto/googleapis/spanner/admin/instance/v1"
22)
23
24// InMemInstanceAdminServer contains the InstanceAdminServer interface plus a couple
25// of specific methods for setting mocked results.
26type InMemInstanceAdminServer interface {
27	instancepb.InstanceAdminServer
28	Stop()
29	Resps() []proto.Message
30	SetResps([]proto.Message)
31	Reqs() []proto.Message
32	SetReqs([]proto.Message)
33	SetErr(error)
34}
35
36// inMemInstanceAdminServer implements InMemInstanceAdminServer interface. Note that
37// there is no mutex protecting the data structures, so it is not safe for
38// concurrent use.
39type inMemInstanceAdminServer struct {
40	instancepb.InstanceAdminServer
41	reqs []proto.Message
42	// If set, all calls return this error
43	err error
44	// responses to return if err == nil
45	resps []proto.Message
46}
47
48// NewInMemInstanceAdminServer creates a new in-mem test server.
49func NewInMemInstanceAdminServer() InMemInstanceAdminServer {
50	res := &inMemInstanceAdminServer{}
51	return res
52}
53
54// GetInstance returns the metadata of a spanner instance.
55func (s *inMemInstanceAdminServer) GetInstance(ctx context.Context, req *instancepb.GetInstanceRequest) (*instancepb.Instance, error) {
56	s.reqs = append(s.reqs, req)
57	if s.err != nil {
58		defer func() { s.err = nil }()
59		return nil, s.err
60	}
61	return s.resps[0].(*instancepb.Instance), nil
62}
63
64func (s *inMemInstanceAdminServer) Stop() {
65	// do nothing
66}
67
68func (s *inMemInstanceAdminServer) Resps() []proto.Message {
69	return s.resps
70}
71
72func (s *inMemInstanceAdminServer) SetResps(resps []proto.Message) {
73	s.resps = resps
74}
75
76func (s *inMemInstanceAdminServer) Reqs() []proto.Message {
77	return s.reqs
78}
79
80func (s *inMemInstanceAdminServer) SetReqs(reqs []proto.Message) {
81	s.reqs = reqs
82}
83
84func (s *inMemInstanceAdminServer) SetErr(err error) {
85	s.err = err
86}
87