-
Notifications
You must be signed in to change notification settings - Fork 19
/
filetest.go
347 lines (305 loc) · 8.67 KB
/
filetest.go
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
// Copyright 2018 The gVisor 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 test implements p9.File acceptance tests.
package test
import (
"fmt"
"io"
"strings"
"testing"
"github.com/hugelgupf/p9/p9"
"github.com/u-root/uio/uio"
"golang.org/x/exp/slices"
)
// TestFile tests attach for all expected p9.Attacher and p9.File behaviors.
//
// TestFile expects attach to attach to an empty, writable directory.
func TestFile(t *testing.T, attach p9.Attacher) {
root, err := attach.Attach()
if err != nil {
t.Fatalf("Failed to attach to %v: %v", attach, err)
}
t.Run("walk-self", func(t *testing.T) { testWalkSelf(t, root) })
t.Run("create-readdir", func(t *testing.T) { testCreate(t, root) })
t.Run("readdir-walk", func(t *testing.T) { testReaddirWalk(t, root) })
}
type file struct {
content string
attr p9.Attr
mask p9.AttrMask
}
type dir struct {
members []string
}
type expect struct {
files map[string]file
dirs map[string]dir
}
type Expect func(e *expect)
func WithDir(path string, members ...string) Expect {
return func(e *expect) {
e.dirs[path] = dir{
members: members,
}
}
}
func WithFile(path string, content string, attr p9.Attr, mask p9.AttrMask) Expect {
return func(e *expect) {
e.files[path] = file{
content: content,
attr: attr,
mask: mask,
}
}
}
func WithSymlink(path string, target string, attr p9.Attr, mask p9.AttrMask) Expect {
return func(e *expect) {
e.files[path] = file{
content: target,
attr: attr,
mask: mask,
}
}
}
// TestReadOnlyFS tests attach for all expected p9.Attacher and p9.File
// behaviors on read-only file systems.
func TestReadOnlyFS(t *testing.T, attach p9.Attacher, expectations ...Expect) {
root, err := attach.Attach()
if err != nil {
t.Fatalf("Failed to attach to %v: %v", attach, err)
}
t.Run("walk-self", func(t *testing.T) { testWalkSelf(t, root) })
t.Run("readdir-walk", func(t *testing.T) { testReaddirWalk(t, root) })
e := expect{
files: make(map[string]file),
dirs: make(map[string]dir),
}
for _, exp := range expectations {
exp(&e)
}
for path, dir := range e.dirs {
t.Run(fmt.Sprintf("dir-%s", path), func(t *testing.T) { testDirContents(t, root, path, dir) })
}
for path, file := range e.files {
t.Run(fmt.Sprintf("file-%s", path), func(t *testing.T) { testIsFile(t, root, path, file) })
}
}
func testDirContents(t *testing.T, root p9.File, path string, d dir) {
var dest []string
if len(path) > 0 {
dest = strings.Split(path, "/")
}
_, f, err := root.Walk(dest)
if err != nil {
t.Fatalf("Walk(%s) failed: %s", path, err)
}
_, _, attr, err := f.GetAttr(p9.AttrMask{Mode: true})
if err != nil {
t.Fatalf("GetAttr = %v", err)
}
if !attr.Mode.IsDir() {
t.Fatalf("GetAttr mode = %v, wanted directory", attr.Mode)
}
if _, _, err := f.Open(p9.ReadOnly); err != nil {
t.Fatalf("Open = %v", err)
}
var dirents []p9.Dirent
offset := uint64(0)
for {
d, err := f.Readdir(offset, 1000)
if len(d) == 0 || err == io.EOF {
break
}
if err != nil {
t.Fatalf("Readdir: %v", err)
}
dirents = append(dirents, d...)
offset = d[len(d)-1].Offset
}
var names []string
for _, entry := range dirents {
names = append(names, entry.Name)
}
slices.Sort(d.members)
slices.Sort(names)
if !slices.Equal(names, d.members) {
t.Fatalf("Readdir = %v, wanted %v", names, d.members)
}
for _, entry := range dirents {
qids, _, err := f.Walk([]string{entry.Name})
if err != nil {
t.Fatalf("Could not walk to %s: %v", entry.Name, err)
}
if qids[0] != entry.QID {
t.Fatalf("For %s: Readdir QID is %v, Walk QID is %v, expected same", entry.Name, entry.QID, qids[0])
}
}
if err := f.Close(); err != nil {
t.Fatalf("Close = %v", err)
}
}
func testIsFile(t *testing.T, root p9.File, path string, file file) {
_, f, err := root.Walk(strings.Split(path, "/"))
if err != nil {
t.Fatalf("Walk(%s) failed: %s", path, err)
}
_, _, attr, err := f.GetAttr(file.mask)
if err != nil {
t.Fatalf("GetAttr = %v", err)
}
if got := attr.WithMask(file.mask); got != file.attr {
t.Fatalf("GetAttr = %v, want %v", got, file.attr)
}
switch {
case file.attr.Mode.IsRegular():
if _, _, err := f.Open(p9.ReadOnly); err != nil {
t.Fatalf("Open = %v, want nil", err)
}
for i := 0; i < 2; i++ {
con, err := uio.ReadAll(f)
if err != nil {
t.Fatalf("ReadAll(%d) = %v, want nil", i, err)
}
if got := string(con); got != file.content {
t.Fatalf("ReadAll(%d) = %v, want %v", i, got, file.content)
}
}
if err := f.Close(); err != nil {
t.Errorf("Close = %v, want nil", err)
}
case file.attr.Mode.IsSymlink():
target, err := f.Readlink()
if err != nil {
t.Fatalf("Readlink = %v", err)
}
if target != file.content {
t.Fatalf("Readlink = %s, want %s", target, file.content)
}
}
}
func testCreate(t *testing.T, root p9.File) {
_, f1, err := root.Walk(nil)
if err != nil {
t.Fatal(err)
}
_, _, _, err = f1.Create("file2", p9.ReadWrite, 0777, p9.NoUID, p9.NoGID)
if err != nil {
t.Errorf("Create(file2) = %v, want nil", err)
}
_, _, _, err = f1.Create("file2", p9.ReadWrite, 0777, p9.NoUID, p9.NoGID)
if err == nil {
t.Errorf("Create(file2) (2nd time) = %v, want EEXIST", err)
}
dirents, err := readdir(root)
if err != nil {
t.Fatal(err)
}
file2dirent := dirents.Find("file2")
if file2dirent == nil {
t.Errorf("Dirents(%v).Find(file2) = nil, but should be there", dirents)
}
}
func readdir(dir p9.File) (p9.Dirents, error) {
_, dirCopy, err := dir.Walk(nil)
if err != nil {
return nil, fmt.Errorf("dir(%v).Walk() = %v, want nil (dir should be able to walk to itself)", dir, err)
}
_, _, err = dirCopy.Open(p9.ReadOnly)
if err != nil {
return nil, fmt.Errorf("dir(%v).Open(ReadOnly) = %v, want nil (directory must be open-able to readdir)", dir, err)
}
dirents, err := dirCopy.Readdir(0, 10)
if err != nil {
return nil, fmt.Errorf("Readdir(dir) = %v, want nil", err)
}
return dirents, nil
}
func testWalkSelf(t *testing.T, root p9.File) {
for _, names := range [][]string{nil, {}} {
t.Run(fmt.Sprintf("self-%#v", names), func(t *testing.T) {
_, got, err := root.Walk(names)
if err != nil {
t.Errorf("Walk(%v, %#v) = %v, want %v", root, names, err, nil)
}
testSameFile(t, root, got)
})
}
}
func testReaddirWalk(t *testing.T, root p9.File) {
dirents, err := readdir(root)
if err != nil {
t.Fatal(err)
}
for _, dirent := range dirents {
t.Run(fmt.Sprintf("walk-to-%s", dirent.Name), func(t *testing.T) {
qids, got, err := root.Walk([]string{dirent.Name})
if err != nil {
t.Errorf("Walk(%v, %s) = %v, want %v", root, dirent.Name, err, nil)
}
if len(qids) != 1 {
t.Errorf("Walk(%v, %s) = %d QIDs, want 1", root, dirent.Name, len(qids))
}
qid, _, _, err := got.GetAttr(p9.AttrMaskAll)
if err != nil {
t.Errorf("GetAttr(%v) = %v, want nil", got, err)
}
if qids[0] != qid {
t.Errorf("GetAttr(%v) = %v, want %v (same QID as returned by Walk)", got, qid, qids[0])
}
})
}
}
func testSameFile(t *testing.T, f1, f2 p9.File) {
f1QID, _, f1Attr, err := f1.GetAttr(p9.AttrMaskAll)
if err != nil {
t.Errorf("Attr(%v) = %v, want nil", f1, err)
}
f2QID, _, f2Attr, err := f2.GetAttr(p9.AttrMaskAll)
if err != nil {
t.Errorf("Attr(%v) = %v, want nil", f2, err)
}
if f1QID != f2QID {
t.Errorf("QIDs of same files do not match: %v and %v", f1QID, f2QID)
}
if f1Attr != f2Attr {
t.Errorf("Attributes of same files do not match: %v and %v", f1Attr, f2Attr)
}
}
func TestReadWriteFS(t *testing.T, attach p9.Attacher) {
root, err := attach.Attach()
if err != nil {
t.Fatalf("Failed to attach to %v: %v", attach, err)
}
defer root.Close()
// Create a dummy file to unlink
const dummyFileName = "dummy_file.txt"
f, _, _, err := root.Create(dummyFileName, p9.ReadWrite, 0666, p9.NoUID, p9.NoGID)
if err != nil {
t.Fatalf("Create failed: %v", err)
}
f.Close()
// Attempt to unlink the file
if err := root.UnlinkAt(dummyFileName, 0); err != nil {
t.Errorf("Unlinkat failed: %v", err)
}
// Check that it does not exist anymore
dirents, err := readdir(root)
if err != nil {
t.Fatal(err)
}
file2dirent := dirents.Find(dummyFileName)
if file2dirent != nil {
t.Errorf("Dirents(%v).Find(file2) = %v, but should be nil", dirents, file2dirent)
}
}