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package image
import (
"slices"
"testing"
cerrdefs "github.com/containerd/errdefs"
"github.com/docker/docker/api/types/image"
"github.com/docker/docker/internal/testutils/specialimage"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
"gotest.tools/v3/skip"
)
func TestLoadDanglingImages(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
ctx := setupTest(t)
client := testEnv.APIClient()
specialimage.Load(ctx, t, client, func(dir string) (*ocispec.Index, error) {
return specialimage.MultiLayerCustom(dir, "namedimage:latest", []specialimage.SingleFileLayer{
{Name: "bar", Content: []byte("1")},
})
})
// Should be one image.
images, err := client.ImageList(ctx, image.ListOptions{})
assert.NilError(t, err)
findImageByName := func(images []image.Summary, imageName string) (image.Summary, error) {
index := slices.IndexFunc(images, func(img image.Summary) bool {
return slices.Index(img.RepoTags, imageName) >= 0
})
if index < 0 {
return image.Summary{}, cerrdefs.ErrNotFound
}
return images[index], nil
}
oldImage, err := findImageByName(images, "namedimage:latest")
assert.NilError(t, err)
// Retain a copy of the old image and then replace it with a new one.
specialimage.Load(ctx, t, client, func(dir string) (*ocispec.Index, error) {
return specialimage.MultiLayerCustom(dir, "namedimage:latest", []specialimage.SingleFileLayer{
{Name: "bar", Content: []byte("2")},
})
})
images, err = client.ImageList(ctx, image.ListOptions{})
assert.NilError(t, err)
newImage, err := findImageByName(images, "namedimage:latest")
assert.NilError(t, err)
// IDs should be different.
assert.Check(t, oldImage.ID != newImage.ID)
// Should be able to find the original digest.
findImageById := func(images []image.Summary, imageId string) (image.Summary, error) {
index := slices.IndexFunc(images, func(img image.Summary) bool {
return img.ID == imageId
})
if index < 0 {
return image.Summary{}, cerrdefs.ErrNotFound
}
return images[index], nil
}
danglingImage, err := findImageById(images, oldImage.ID)
assert.NilError(t, err)
assert.Check(t, is.Len(danglingImage.RepoTags, 0))
}
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