aboutsummaryrefslogtreecommitdiff
path: root/libpod/image/image_test.go
blob: 19f7eee1e33697cd1c4ebdc3b2279bfc52e2d567 (plain)
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
package image

import (
	"context"
	"fmt"
	"io/ioutil"
	"os"
	"testing"

	"github.com/containers/libpod/libpod/events"
	"github.com/containers/libpod/pkg/util"
	"github.com/containers/storage"
	"github.com/containers/storage/pkg/reexec"
	"github.com/opencontainers/go-digest"
	"github.com/stretchr/testify/assert"
)

var (
	bbNames      = []string{"docker.io/library/busybox:latest", "docker.io/library/busybox", "docker.io/busybox:latest", "docker.io/busybox", "busybox:latest", "busybox"}
	bbGlibcNames = []string{"docker.io/library/busybox:glibc", "docker.io/busybox:glibc", "busybox:glibc"}
)

type localImageTest struct {
	fqname, taggedName string
	img                *Image
	names              []string
}

// make a temporary directory for the runtime
func mkWorkDir() (string, error) {
	return ioutil.TempDir("", "podman-test")
}

// shutdown the runtime and clean behind it
func cleanup(workdir string, ir *Runtime) {
	if err := ir.Shutdown(false); err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	err := os.RemoveAll(workdir)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
}

func makeLocalMatrix(b, bg *Image) ([]localImageTest, error) {
	var l []localImageTest
	// busybox
	busybox := localImageTest{
		fqname:     "docker.io/library/busybox:latest",
		taggedName: "bb:latest",
	}
	busybox.img = b
	busybox.names = b.Names()
	busybox.names = append(busybox.names, []string{"bb:latest", "bb", b.ID(), b.ID()[0:7], fmt.Sprintf("busybox@%s", b.Digest())}...)

	// busybox-glibc
	busyboxGlibc := localImageTest{
		fqname:     "docker.io/library/busybox:glibc",
		taggedName: "bb:glibc",
	}

	busyboxGlibc.img = bg
	busyboxGlibc.names = bbGlibcNames

	l = append(l, busybox, busyboxGlibc)
	return l, nil

}

func TestMain(m *testing.M) {
	if reexec.Init() {
		return
	}
	os.Exit(m.Run())
}

// TestImage_NewFromLocal tests finding the image locally by various names,
// tags, and aliases
func TestImage_NewFromLocal(t *testing.T) {
	if os.Geteuid() != 0 { // containers/storage requires root access
		t.Skipf("Test not running as root")
	}

	workdir, err := mkWorkDir()
	assert.NoError(t, err)
	so := storage.StoreOptions{
		RunRoot:   workdir,
		GraphRoot: workdir,
	}
	writer := os.Stdout

	// Need images to be present for this test
	ir, err := NewImageRuntimeFromOptions(so)
	assert.NoError(t, err)
	ir.Eventer = events.NewNullEventer()
	bb, err := ir.New(context.Background(), "docker.io/library/busybox:latest", "", "", writer, nil, SigningOptions{}, nil, util.PullImageMissing)
	assert.NoError(t, err)
	bbglibc, err := ir.New(context.Background(), "docker.io/library/busybox:glibc", "", "", writer, nil, SigningOptions{}, nil, util.PullImageMissing)
	assert.NoError(t, err)

	tm, err := makeLocalMatrix(bb, bbglibc)
	assert.NoError(t, err)

	for _, image := range tm {
		// tag our images
		err = image.img.TagImage(image.taggedName)
		assert.NoError(t, err)
		for _, name := range image.names {
			newImage, err := ir.NewFromLocal(name)
			assert.NoError(t, err)
			assert.Equal(t, newImage.ID(), image.img.ID())
		}
	}

	// Shutdown the runtime and remove the temporary storage
	cleanup(workdir, ir)
}

// TestImage_New tests pulling the image by various names, tags, and from
// different registries
func TestImage_New(t *testing.T) {
	if os.Geteuid() != 0 { // containers/storage requires root access
		t.Skipf("Test not running as root")
	}

	var names []string
	workdir, err := mkWorkDir()
	assert.NoError(t, err)

	so := storage.StoreOptions{
		RunRoot:   workdir,
		GraphRoot: workdir,
	}
	ir, err := NewImageRuntimeFromOptions(so)
	assert.NoError(t, err)
	ir.Eventer = events.NewNullEventer()
	// Build the list of pull names
	names = append(names, bbNames...)
	writer := os.Stdout

	// Iterate over the names and delete the image
	// after the pull
	for _, img := range names {
		newImage, err := ir.New(context.Background(), img, "", "", writer, nil, SigningOptions{}, nil, util.PullImageMissing)
		assert.NoError(t, err)
		assert.NotEqual(t, newImage.ID(), "")
		err = newImage.Remove(context.Background(), false)
		assert.NoError(t, err)
	}

	// Shutdown the runtime and remove the temporary storage
	cleanup(workdir, ir)
}

// TestImage_MatchRepoTag tests the various inputs we need to match
// against an image's reponames
func TestImage_MatchRepoTag(t *testing.T) {
	if os.Geteuid() != 0 { // containers/storage requires root access
		t.Skipf("Test not running as root")
	}

	//Set up
	workdir, err := mkWorkDir()
	assert.NoError(t, err)

	so := storage.StoreOptions{
		RunRoot:   workdir,
		GraphRoot: workdir,
	}
	ir, err := NewImageRuntimeFromOptions(so)
	assert.NoError(t, err)
	ir.Eventer = events.NewNullEventer()
	newImage, err := ir.New(context.Background(), "busybox", "", "", os.Stdout, nil, SigningOptions{}, nil, util.PullImageMissing)
	assert.NoError(t, err)
	err = newImage.TagImage("foo:latest")
	assert.NoError(t, err)
	err = newImage.TagImage("foo:bar")
	assert.NoError(t, err)

	// Tests start here.
	for _, name := range bbNames {
		repoTag, err := newImage.MatchRepoTag(name)
		assert.NoError(t, err)
		assert.Equal(t, "docker.io/library/busybox:latest", repoTag)
	}

	// Test against tagged images of busybox

	// foo should resolve to foo:latest
	repoTag, err := newImage.MatchRepoTag("foo")
	assert.NoError(t, err)
	assert.Equal(t, "localhost/foo:latest", repoTag)

	// foo:bar should resolve to foo:bar
	repoTag, err = newImage.MatchRepoTag("foo:bar")
	assert.NoError(t, err)
	assert.Equal(t, "localhost/foo:bar", repoTag)
	// Shutdown the runtime and remove the temporary storage
	cleanup(workdir, ir)
}

// TestImage_RepoDigests tests RepoDigest generation.
func TestImage_RepoDigests(t *testing.T) {
	dgst, err := digest.Parse("sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc")
	if err != nil {
		t.Fatal(err)
	}

	for _, tt := range []struct {
		name     string
		names    []string
		expected []string
	}{
		{
			name:     "empty",
			names:    []string{},
			expected: nil,
		},
		{
			name:     "tagged",
			names:    []string{"docker.io/library/busybox:latest"},
			expected: []string{"docker.io/library/busybox@sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc"},
		},
		{
			name:     "digest",
			names:    []string{"docker.io/library/busybox@sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc"},
			expected: []string{"docker.io/library/busybox@sha256:7173b809ca12ec5dee4506cd86be934c4596dd234ee82c0662eac04a8c2c71dc"},
		},
	} {
		test := tt
		t.Run(test.name, func(t *testing.T) {
			image := &Image{
				image: &storage.Image{
					Names:  test.names,
					Digest: dgst,
				},
			}
			actual, err := image.RepoDigests()
			if err != nil {
				t.Fatal(err)
			}

			assert.Equal(t, test.expected, actual)

			image = &Image{
				image: &storage.Image{
					Names:   test.names,
					Digests: []digest.Digest{dgst},
				},
			}
			actual, err = image.RepoDigests()
			if err != nil {
				t.Fatal(err)
			}

			assert.Equal(t, test.expected, actual)
		})
	}
}

// Test_splitString tests the splitString function in image that
// takes input and splits on / and returns the last array item
func Test_splitString(t *testing.T) {
	assert.Equal(t, splitString("foo/bar"), "bar")
	assert.Equal(t, splitString("a/foo/bar"), "bar")
	assert.Equal(t, splitString("bar"), "bar")
}

// Test_stripSha256 tests test the stripSha256 function which removes
// the prefix "sha256:" from a string if it is present
func Test_stripSha256(t *testing.T) {
	assert.Equal(t, stripSha256(""), "")
	assert.Equal(t, stripSha256("test1"), "test1")
	assert.Equal(t, stripSha256("sha256:9110ae7f579f35ee0c3938696f23fe0f5fbe641738ea52eb83c2df7e9995fa17"), "9110ae7f579f35ee0c3938696f23fe0f5fbe641738ea52eb83c2df7e9995fa17")
	assert.Equal(t, stripSha256("sha256:9110ae7f"), "9110ae7f")
	assert.Equal(t, stripSha256("sha256:"), "sha256:")
	assert.Equal(t, stripSha256("sha256:a"), "a")
}

func TestNormalizedTag(t *testing.T) {
	const digestSuffix = "@sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"

	for _, c := range []struct{ input, expected string }{
		{"#", ""}, // Clearly invalid
		{"example.com/busybox", "example.com/busybox:latest"},                                            // Qualified name-only
		{"example.com/busybox:notlatest", "example.com/busybox:notlatest"},                               // Qualified name:tag
		{"example.com/busybox" + digestSuffix, "example.com/busybox" + digestSuffix},                     // Qualified name@digest; FIXME? Should we allow tagging with a digest at all?
		{"example.com/busybox:notlatest" + digestSuffix, "example.com/busybox:notlatest" + digestSuffix}, // Qualified name:tag@digest
		{"busybox:latest", "localhost/busybox:latest"},                                                   // Unqualified name-only
		{"ns/busybox:latest", "localhost/ns/busybox:latest"},                                             // Unqualified with a dot-less namespace
		{"docker.io/busybox:latest", "docker.io/library/busybox:latest"},                                 // docker.io without /library/
	} {
		res, err := normalizedTag(c.input)
		if c.expected == "" {
			assert.Error(t, err, c.input)
		} else {
			assert.NoError(t, err, c.input)
			assert.Equal(t, c.expected, res.String())
		}
	}
}