1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
*
* Copyright 2020 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package resolver
import (
"context"
"regexp"
"testing"
xxhash "github.com/cespare/xxhash/v2"
"github.com/google/go-cmp/cmp"
iresolver "google.golang.org/grpc/internal/resolver"
"google.golang.org/grpc/metadata"
_ "google.golang.org/grpc/xds/internal/balancer/cdsbalancer" // To parse LB config
"google.golang.org/grpc/xds/internal/xdsclient/xdsresource"
)
func (s) TestPruneActiveClusters(t *testing.T) {
r := &xdsResolver{activeClusters: map[string]*clusterInfo{
"zero": {refCount: 0},
"one": {refCount: 1},
"two": {refCount: 2},
"anotherzero": {refCount: 0},
}}
want := map[string]*clusterInfo{
"one": {refCount: 1},
"two": {refCount: 2},
}
r.pruneActiveClusters()
if d := cmp.Diff(r.activeClusters, want, cmp.AllowUnexported(clusterInfo{})); d != "" {
t.Fatalf("r.activeClusters = %v; want %v\nDiffs: %v", r.activeClusters, want, d)
}
}
func (s) TestGenerateRequestHash(t *testing.T) {
const channelID = 12378921
cs := &configSelector{
r: &xdsResolver{
cc: &testClientConn{},
channelID: channelID,
},
}
tests := []struct {
name string
hashPolicies []*xdsresource.HashPolicy
requestHashWant uint64
rpcInfo iresolver.RPCInfo
}{
// TestGenerateRequestHashHeaders tests generating request hashes for
// hash policies that specify to hash headers.
{
name: "test-generate-request-hash-headers",
hashPolicies: []*xdsresource.HashPolicy{{
HashPolicyType: xdsresource.HashPolicyTypeHeader,
HeaderName: ":path",
Regex: func() *regexp.Regexp { return regexp.MustCompile("/products") }(), // Will replace /products with /new-products, to test find and replace functionality.
RegexSubstitution: "/new-products",
}},
requestHashWant: xxhash.Sum64String("/new-products"),
rpcInfo: iresolver.RPCInfo{
Context: metadata.NewOutgoingContext(context.Background(), metadata.Pairs(":path", "/products")),
Method: "/some-method",
},
},
// TestGenerateHashChannelID tests generating request hashes for hash
// policies that specify to hash something that uniquely identifies the
// ClientConn (the pointer).
{
name: "test-generate-request-hash-channel-id",
hashPolicies: []*xdsresource.HashPolicy{{
HashPolicyType: xdsresource.HashPolicyTypeChannelID,
}},
requestHashWant: channelID,
rpcInfo: iresolver.RPCInfo{},
},
// TestGenerateRequestHashEmptyString tests generating request hashes
// for hash policies that specify to hash headers and replace empty
// strings in the headers.
{
name: "test-generate-request-hash-empty-string",
hashPolicies: []*xdsresource.HashPolicy{{
HashPolicyType: xdsresource.HashPolicyTypeHeader,
HeaderName: ":path",
Regex: func() *regexp.Regexp { return regexp.MustCompile("") }(),
RegexSubstitution: "e",
}},
requestHashWant: xxhash.Sum64String("eaebece"),
rpcInfo: iresolver.RPCInfo{
Context: metadata.NewOutgoingContext(context.Background(), metadata.Pairs(":path", "abc")),
Method: "/some-method",
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
requestHashGot := cs.generateHash(test.rpcInfo, test.hashPolicies)
if requestHashGot != test.requestHashWant {
t.Fatalf("requestHashGot = %v, requestHashWant = %v", requestHashGot, test.requestHashWant)
}
})
}
}
|
