File: net_sockstat_test.go

package info (click to toggle)
golang-procfs 0.0.10-2
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 1,048 kB
  • sloc: sh: 340; makefile: 20
file content (213 lines) | stat: -rw-r--r-- 4,738 bytes parent folder | download | duplicates (8)
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
// Copyright 2019 The Prometheus 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 procfs

import (
	"os"
	"strings"
	"testing"

	"github.com/google/go-cmp/cmp"
)

// The majority of test cases are covered in Test_parseSockstat. The top level
// tests just check the basics for integration test purposes.

func TestNetSockstat(t *testing.T) {
	fs, err := NewFS(procTestFixtures)
	if err != nil {
		t.Fatalf("failed to open procfs: %v", err)
	}

	stat, err := fs.NetSockstat()
	if err != nil {
		t.Fatalf("failed to get sockstat: %v", err)
	}

	// IPv4 stats should include Used.
	if stat.Used == nil {
		t.Fatalf("IPv4 sockstat used value was nil")
	}
	if diff := cmp.Diff(1602, *stat.Used); diff != "" {
		t.Fatalf("unexpected IPv4 used sockets (-want +got):\n%s", diff)
	}

	// TCP occurs first; do a basic sanity check.
	if diff := cmp.Diff("TCP", stat.Protocols[0].Protocol); diff != "" {
		t.Fatalf("unexpected socket protocol (-want +got):\n%s", diff)
	}
	if diff := cmp.Diff(35, stat.Protocols[0].InUse); diff != "" {
		t.Fatalf("unexpected number of TCP sockets (-want +got):\n%s", diff)
	}
}

func TestNetSockstat6(t *testing.T) {
	fs, err := NewFS(procTestFixtures)
	if err != nil {
		t.Fatalf("failed to open procfs: %v", err)
	}

	stat, err := fs.NetSockstat6()
	if err != nil {
		t.Fatalf("failed to get sockstat: %v", err)
	}

	// IPv6 stats should not include Used.
	if stat.Used != nil {
		t.Fatalf("IPv6 sockstat used value was not nil")
	}

	// TCP6 occurs first; do a basic sanity check.
	if diff := cmp.Diff("TCP6", stat.Protocols[0].Protocol); diff != "" {
		t.Fatalf("unexpected socket protocol (-want +got):\n%s", diff)
	}
	if diff := cmp.Diff(17, stat.Protocols[0].InUse); diff != "" {
		t.Fatalf("unexpected number of TCP sockets (-want +got):\n%s", diff)
	}
}

func Test_readSockstatIsNotExist(t *testing.T) {
	// On a machine with IPv6 disabled for example, we want to ensure that
	// readSockstat returns an error that is compatible with os.IsNotExist.
	//
	// We can use a synthetic file path here to verify this behavior.
	_, err := readSockstat("/does/not/exist")
	if err == nil || !os.IsNotExist(err) {
		t.Fatalf("error is not compatible with os.IsNotExist: %#v", err)
	}
}

func Test_parseSockstat(t *testing.T) {
	tests := []struct {
		name string
		s    string
		ok   bool
		stat *NetSockstat
	}{
		{
			name: "empty",
			ok:   true,
			stat: &NetSockstat{},
		},
		{
			name: "bad line",
			s: `
sockets: used
`,
		},
		{
			name: "bad key/value pairs",
			s: `
TCP: inuse 32 orphan
`,
		},
		{
			name: "IPv4",
			s: `
sockets: used 1591
TCP: inuse 32 orphan 0 tw 0 alloc 58 mem 13
UDP: inuse 8 mem 115
UDPLITE: inuse 0
RAW: inuse 0
FRAG: inuse 0 memory 0
			`,
			ok: true,
			stat: &NetSockstat{
				Used: intp(1591),
				Protocols: []NetSockstatProtocol{
					{
						Protocol: "TCP",
						InUse:    32,
						Orphan:   intp(0),
						TW:       intp(0),
						Alloc:    intp(58),
						Mem:      intp(13),
					},
					{
						Protocol: "UDP",
						InUse:    8,
						Mem:      intp(115),
					},
					{
						Protocol: "UDPLITE",
					},
					{
						Protocol: "RAW",
					},
					{
						Protocol: "FRAG",
						Memory:   intp(0),
					},
				},
			},
		},
		{
			name: "IPv6",
			s: `
TCP6: inuse 24
UDP6: inuse 9
UDPLITE6: inuse 0
RAW6: inuse 1
FRAG6: inuse 0 memory 0
			`,
			ok: true,
			stat: &NetSockstat{
				Protocols: []NetSockstatProtocol{
					{
						Protocol: "TCP6",
						InUse:    24,
					},
					{
						Protocol: "UDP6",
						InUse:    9,
					},
					{
						Protocol: "UDPLITE6",
					},
					{
						Protocol: "RAW6",
						InUse:    1,
					},
					{
						Protocol: "FRAG6",
						Memory:   intp(0),
					},
				},
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			stat, err := parseSockstat(strings.NewReader(strings.TrimSpace(tt.s)))
			if err != nil {
				if tt.ok {
					t.Fatalf("failed to parse sockstats: %v", err)
				}

				t.Logf("OK error: %v", err)
				return
			}
			if !tt.ok {
				t.Fatal("expected an error, but none occurred")
			}

			if diff := cmp.Diff(tt.stat, stat); diff != "" {
				t.Errorf("unexpected sockstats (-want +got):\n%s", diff)
			}
		})
	}
}

func intp(i int) *int { return &i }