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moby--moby/image/image_test.go

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package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"runtime"
"sort"
"strings"
"testing"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/layer"
"github.com/google/go-cmp/cmp"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
const sampleImageJSON = `{
"architecture": "amd64",
"os": "linux",
"config": {},
"rootfs": {
"type": "layers",
"diff_ids": []
}
}`
func TestNewFromJSON(t *testing.T) {
img, err := NewFromJSON([]byte(sampleImageJSON))
assert.NilError(t, err)
assert.Check(t, is.Equal(sampleImageJSON, string(img.RawJSON())))
}
func TestNewFromJSONWithInvalidJSON(t *testing.T) {
_, err := NewFromJSON([]byte("{}"))
assert.Check(t, is.Error(err, "invalid image JSON, no RootFS key"))
}
func TestMarshalKeyOrder(t *testing.T) {
b, err := json.Marshal(&Image{
V1Image: V1Image{
Comment: "a",
Author: "b",
Architecture: "c",
},
})
assert.Check(t, err)
expectedOrder := []string{"architecture", "author", "comment"}
var indexes []int
for _, k := range expectedOrder {
indexes = append(indexes, strings.Index(string(b), k))
}
if !sort.IntsAreSorted(indexes) {
t.Fatal("invalid key order in JSON: ", string(b))
}
}
const sampleHistoryJSON = `{
"created": "2021-01-13T09:35:56Z",
"created_by": "image_test.go"
}`
func TestHistoryEqual(t *testing.T) {
h := historyFromJSON(t, sampleHistoryJSON)
hCopy := h
assert.Check(t, h.Equal(hCopy))
hUTC := historyFromJSON(t, `{"created": "2021-01-13T14:00:00Z"}`)
hOffset0 := historyFromJSON(t, `{"created": "2021-01-13T14:00:00+00:00"}`)
assert.Check(t, hUTC.Created != hOffset0.Created)
assert.Check(t, hUTC.Equal(hOffset0))
}
func historyFromJSON(t *testing.T, historyJSON string) History {
var h History
err := json.Unmarshal([]byte(historyJSON), &h)
assert.Check(t, err)
return h
}
func TestImage(t *testing.T) {
cid := "50a16564e727"
config := &container.Config{
Hostname: "hostname",
Domainname: "domain",
User: "root",
}
os := runtime.GOOS
img := &Image{
V1Image: V1Image{
Config: config,
},
computedID: ID(cid),
}
assert.Check(t, is.Equal(cid, img.ImageID()))
assert.Check(t, is.Equal(cid, img.ID().String()))
assert.Check(t, is.Equal(os, img.OperatingSystem()))
assert.Check(t, is.DeepEqual(config, img.RunConfig()))
}
func TestImageOSNotEmpty(t *testing.T) {
os := "os"
img := &Image{
V1Image: V1Image{
OS: os,
},
OSVersion: "osversion",
}
assert.Check(t, is.Equal(os, img.OperatingSystem()))
}
func TestNewChildImageFromImageWithRootFS(t *testing.T) {
rootFS := NewRootFS()
rootFS.Append(layer.DiffID("ba5e"))
parent := &Image{
RootFS: rootFS,
History: []History{
NewHistory("a", "c", "r", false),
},
}
childConfig := ChildConfig{
DiffID: layer.DiffID("abcdef"),
Author: "author",
Comment: "comment",
ContainerConfig: &container.Config{
Cmd: []string{"echo", "foo"},
},
Config: &container.Config{},
}
newImage := NewChildImage(parent, childConfig, "platform")
expectedDiffIDs := []layer.DiffID{layer.DiffID("ba5e"), layer.DiffID("abcdef")}
assert.Check(t, is.DeepEqual(expectedDiffIDs, newImage.RootFS.DiffIDs))
assert.Check(t, is.Equal(childConfig.Author, newImage.Author))
assert.Check(t, is.DeepEqual(childConfig.Config, newImage.Config))
assert.Check(t, is.DeepEqual(*childConfig.ContainerConfig, newImage.ContainerConfig))
assert.Check(t, is.Equal("platform", newImage.OS))
assert.Check(t, is.DeepEqual(childConfig.Config, newImage.Config))
assert.Check(t, is.Len(newImage.History, 2))
assert.Check(t, is.Equal(childConfig.Comment, newImage.History[1].Comment))
assert.Check(t, !cmp.Equal(parent.RootFS.DiffIDs, newImage.RootFS.DiffIDs),
"RootFS should be copied not mutated")
}