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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
package oci
import (
"context"
"fmt"
"os"
"path"
"testing"
"time"
"github.com/moby/buildkit/solver/pb"
"github.com/stretchr/testify/require"
)
const defaultResolvConf = `nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 2001:4860:4860::8888
nameserver 2001:4860:4860::8844
`
const dnsOption = `options ndots:0
`
const localDNSResolvConf = `nameserver 127.0.0.11
options ndots:0
`
const regularResolvConf = `nameserver 192.168.65.5
`
// TestResolvConf modifies a global variable
// It must not run in parallel.
func TestResolvConf(t *testing.T) {
cases := []struct {
name string
dt []byte
execution int
networkMode []pb.NetMode
expected []string
}{
{
name: "TestResolvConfNotExist",
dt: nil,
execution: 1,
networkMode: []pb.NetMode{pb.NetMode_UNSET},
expected: []string{defaultResolvConf},
},
{
name: "TestNetModeIsHostResolvConfNotExist",
dt: nil,
execution: 1,
networkMode: []pb.NetMode{pb.NetMode_HOST},
expected: []string{defaultResolvConf},
},
{
name: "TestNetModeIsHostWithoutLocalDNS",
dt: []byte(regularResolvConf),
execution: 1,
networkMode: []pb.NetMode{pb.NetMode_HOST},
expected: []string{regularResolvConf},
},
{
name: "TestNetModeIsHostWithLocalDNS",
dt: []byte(localDNSResolvConf),
execution: 1,
networkMode: []pb.NetMode{pb.NetMode_HOST},
expected: []string{localDNSResolvConf},
},
{
name: "TestNetModeNotHostWithoutLocalDNS",
dt: []byte(regularResolvConf),
execution: 1,
networkMode: []pb.NetMode{pb.NetMode_UNSET},
expected: []string{regularResolvConf},
},
{
name: "TestNetModeNotHostWithLocalDNS",
dt: []byte(localDNSResolvConf),
execution: 1,
networkMode: []pb.NetMode{pb.NetMode_UNSET},
expected: []string{fmt.Sprintf("%s%s", defaultResolvConf, dnsOption)},
},
{
name: "TestRegenerateResolvconfToRemoveLocalDNS",
dt: []byte(localDNSResolvConf),
execution: 2,
networkMode: []pb.NetMode{pb.NetMode_HOST, pb.NetMode_UNSET},
expected: []string{
localDNSResolvConf,
fmt.Sprintf("%s%s", defaultResolvConf, dnsOption),
},
},
{
name: "TestRegenerateResolvconfToAddLocalDNS",
dt: []byte(localDNSResolvConf),
execution: 2,
networkMode: []pb.NetMode{pb.NetMode_UNSET, pb.NetMode_HOST},
expected: []string{
fmt.Sprintf("%s%s", defaultResolvConf, dnsOption),
localDNSResolvConf,
},
},
}
for _, tt := range cases {
tt := tt
t.Run(tt.name, func(t *testing.T) {
ctx := context.Background()
tempDir := t.TempDir()
oldResolvconfPath := resolvconfPath
t.Cleanup(func() {
resolvconfPath = oldResolvconfPath
})
for i := 0; i < tt.execution; i++ {
resolvconfPath = func(netMode pb.NetMode) string {
if tt.dt == nil {
return "no-such-file"
}
rpath := path.Join(t.TempDir(), "resolv.conf")
require.NoError(t, os.WriteFile(rpath, tt.dt, 0600))
require.Equal(t, tt.networkMode[i], netMode)
return rpath
}
if i > 0 {
time.Sleep(100 * time.Millisecond)
}
p, err := GetResolvConf(ctx, tempDir, nil, nil, tt.networkMode[i])
require.NoError(t, err)
b, err := os.ReadFile(p)
require.NoError(t, err)
require.Equal(t, tt.expected[i], string(b))
}
})
}
}
|
