1/*
2 *
3 * Copyright 2017 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19package grpc
20
21import (
22	"context"
23	"errors"
24	"fmt"
25	"net"
26	"strings"
27	"testing"
28	"time"
29
30	"google.golang.org/grpc/balancer"
31	"google.golang.org/grpc/codes"
32	"google.golang.org/grpc/internal/balancer/stub"
33	"google.golang.org/grpc/resolver"
34	"google.golang.org/grpc/resolver/manual"
35	"google.golang.org/grpc/serviceconfig"
36	"google.golang.org/grpc/status"
37)
38
39// The target string with unknown scheme should be kept unchanged and passed to
40// the dialer.
41func (s) TestDialParseTargetUnknownScheme(t *testing.T) {
42	for _, test := range []struct {
43		targetStr string
44		want      string
45	}{
46		{"/unix/socket/address", "/unix/socket/address"},
47
48		// For known scheme.
49		{"passthrough://a.server.com/google.com", "google.com"},
50	} {
51		dialStrCh := make(chan string, 1)
52		cc, err := Dial(test.targetStr, WithInsecure(), WithDialer(func(addr string, _ time.Duration) (net.Conn, error) {
53			select {
54			case dialStrCh <- addr:
55			default:
56			}
57			return nil, fmt.Errorf("test dialer, always error")
58		}))
59		if err != nil {
60			t.Fatalf("Failed to create ClientConn: %v", err)
61		}
62		got := <-dialStrCh
63		cc.Close()
64		if got != test.want {
65			t.Errorf("Dial(%q), dialer got %q, want %q", test.targetStr, got, test.want)
66		}
67	}
68}
69
70const happyBalancerName = "happy balancer"
71
72func init() {
73	// Register a balancer that never returns an error from
74	// UpdateClientConnState, and doesn't do anything else either.
75	bf := stub.BalancerFuncs{
76		UpdateClientConnState: func(*stub.BalancerData, balancer.ClientConnState) error {
77			return nil
78		},
79	}
80	stub.Register(happyBalancerName, bf)
81}
82
83// TestResolverErrorInBuild makes the resolver.Builder call into the ClientConn
84// during the Build call. We use two separate mutexes in the code which make
85// sure there is no data race in this code path, and also that there is no
86// deadlock.
87func (s) TestResolverErrorInBuild(t *testing.T) {
88	r := manual.NewBuilderWithScheme("whatever")
89	r.InitialState(resolver.State{ServiceConfig: &serviceconfig.ParseResult{Err: errors.New("resolver build err")}})
90
91	cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithResolvers(r))
92	if err != nil {
93		t.Fatalf("Dial(_, _) = _, %v; want _, nil", err)
94	}
95	defer cc.Close()
96
97	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
98	defer cancel()
99	var dummy int
100	const wantMsg = "error parsing service config"
101	const wantCode = codes.Unavailable
102	if err := cc.Invoke(ctx, "/foo/bar", &dummy, &dummy); status.Code(err) != wantCode || !strings.Contains(status.Convert(err).Message(), wantMsg) {
103		t.Fatalf("cc.Invoke(_, _, _, _) = %v; want status.Code()==%v, status.Message() contains %q", err, wantCode, wantMsg)
104	}
105}
106
107func (s) TestServiceConfigErrorRPC(t *testing.T) {
108	r := manual.NewBuilderWithScheme("whatever")
109
110	cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithResolvers(r))
111	if err != nil {
112		t.Fatalf("Dial(_, _) = _, %v; want _, nil", err)
113	}
114	defer cc.Close()
115	badsc := r.CC.ParseServiceConfig("bad config")
116	r.UpdateState(resolver.State{ServiceConfig: badsc})
117
118	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
119	defer cancel()
120	var dummy int
121	const wantMsg = "error parsing service config"
122	const wantCode = codes.Unavailable
123	if err := cc.Invoke(ctx, "/foo/bar", &dummy, &dummy); status.Code(err) != wantCode || !strings.Contains(status.Convert(err).Message(), wantMsg) {
124		t.Fatalf("cc.Invoke(_, _, _, _) = %v; want status.Code()==%v, status.Message() contains %q", err, wantCode, wantMsg)
125	}
126}
127