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package graphdriver // import "github.com/docker/docker/daemon/graphdriver"
import (
"encoding/json"
"testing"
"github.com/docker/docker/pkg/idtools"
"gotest.tools/v3/assert"
)
func TestGraphDriverInitRequestIsCompatible(t *testing.T) {
// Graph driver plugins may unmarshal into this version of the init
// request struct. Verify that the serialization of
// graphDriverInitRequest is fully backwards compatible.
type graphDriverInitRequestV1 struct {
Home string
Opts []string `json:"Opts"`
UIDMaps []idtools.IDMap `json:"UIDMaps"`
GIDMaps []idtools.IDMap `json:"GIDMaps"`
}
args := graphDriverInitRequest{
Home: "homedir",
Opts: []string{"option1", "option2"},
IdentityMapping: idtools.IdentityMapping{
UIDMaps: []idtools.IDMap{{ContainerID: 123, HostID: 456, Size: 42}},
GIDMaps: []idtools.IDMap{{ContainerID: 789, HostID: 1011, Size: 16}},
},
}
v, err := json.Marshal(&args)
assert.NilError(t, err)
var got graphDriverInitRequestV1
assert.NilError(t, json.Unmarshal(v, &got))
want := graphDriverInitRequestV1{
Home: args.Home,
Opts: args.Opts,
UIDMaps: args.UIDMaps,
GIDMaps: args.GIDMaps,
}
assert.DeepEqual(t, got, want)
}
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