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package image // import "github.com/docker/docker/image"
import (
"fmt"
"runtime"
"testing"
"github.com/docker/docker/layer"
"gotest.tools/v3/assert"
"gotest.tools/v3/assert/cmp"
)
func TestCreate(t *testing.T) {
is, cleanup := defaultImageStore(t)
defer cleanup()
_, err := is.Create([]byte(`{}`))
assert.Check(t, cmp.Error(err, "invalid image JSON, no RootFS key"))
}
func TestRestore(t *testing.T) {
fs, cleanup := defaultFSStoreBackend(t)
defer cleanup()
id1, err := fs.Set([]byte(`{"comment": "abc", "rootfs": {"type": "layers"}}`))
assert.NilError(t, err)
_, err = fs.Set([]byte(`invalid`))
assert.NilError(t, err)
id2, err := fs.Set([]byte(`{"comment": "def", "rootfs": {"type": "layers", "diff_ids": ["2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae"]}}`))
assert.NilError(t, err)
err = fs.SetMetadata(id2, "parent", []byte(id1))
assert.NilError(t, err)
mlgrMap := make(map[string]LayerGetReleaser)
mlgrMap[runtime.GOOS] = &mockLayerGetReleaser{}
is, err := NewImageStore(fs, mlgrMap)
assert.NilError(t, err)
assert.Check(t, cmp.Len(is.Map(), 2))
img1, err := is.Get(ID(id1))
assert.NilError(t, err)
assert.Check(t, cmp.Equal(ID(id1), img1.computedID))
assert.Check(t, cmp.Equal(string(id1), img1.computedID.String()))
img2, err := is.Get(ID(id2))
assert.NilError(t, err)
assert.Check(t, cmp.Equal("abc", img1.Comment))
assert.Check(t, cmp.Equal("def", img2.Comment))
_, err = is.GetParent(ID(id1))
assert.ErrorContains(t, err, "failed to read metadata")
p, err := is.GetParent(ID(id2))
assert.NilError(t, err)
assert.Check(t, cmp.Equal(ID(id1), p))
children := is.Children(ID(id1))
assert.Check(t, cmp.Len(children, 1))
assert.Check(t, cmp.Equal(ID(id2), children[0]))
assert.Check(t, cmp.Len(is.Heads(), 1))
sid1, err := is.Search(string(id1)[:10])
assert.NilError(t, err)
assert.Check(t, cmp.Equal(ID(id1), sid1))
sid1, err = is.Search(id1.Hex()[:6])
assert.NilError(t, err)
assert.Check(t, cmp.Equal(ID(id1), sid1))
invalidPattern := id1.Hex()[1:6]
_, err = is.Search(invalidPattern)
assert.ErrorContains(t, err, "No such image")
}
func TestAddDelete(t *testing.T) {
is, cleanup := defaultImageStore(t)
defer cleanup()
id1, err := is.Create([]byte(`{"comment": "abc", "rootfs": {"type": "layers", "diff_ids": ["2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae"]}}`))
assert.NilError(t, err)
assert.Check(t, cmp.Equal(ID("sha256:8d25a9c45df515f9d0fe8e4a6b1c64dd3b965a84790ddbcc7954bb9bc89eb993"), id1))
img, err := is.Get(id1)
assert.NilError(t, err)
assert.Check(t, cmp.Equal("abc", img.Comment))
id2, err := is.Create([]byte(`{"comment": "def", "rootfs": {"type": "layers", "diff_ids": ["2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae"]}}`))
assert.NilError(t, err)
err = is.SetParent(id2, id1)
assert.NilError(t, err)
pid1, err := is.GetParent(id2)
assert.NilError(t, err)
assert.Check(t, cmp.Equal(pid1, id1))
_, err = is.Delete(id1)
assert.NilError(t, err)
_, err = is.Get(id1)
assert.ErrorContains(t, err, "failed to get digest")
_, err = is.Get(id2)
assert.NilError(t, err)
_, err = is.GetParent(id2)
assert.ErrorContains(t, err, "failed to read metadata")
}
func TestSearchAfterDelete(t *testing.T) {
is, cleanup := defaultImageStore(t)
defer cleanup()
id, err := is.Create([]byte(`{"comment": "abc", "rootfs": {"type": "layers"}}`))
assert.NilError(t, err)
id1, err := is.Search(string(id)[:15])
assert.NilError(t, err)
assert.Check(t, cmp.Equal(id1, id))
_, err = is.Delete(id)
assert.NilError(t, err)
_, err = is.Search(string(id)[:15])
assert.ErrorContains(t, err, "No such image")
}
func TestParentReset(t *testing.T) {
is, cleanup := defaultImageStore(t)
defer cleanup()
id, err := is.Create([]byte(`{"comment": "abc1", "rootfs": {"type": "layers"}}`))
assert.NilError(t, err)
id2, err := is.Create([]byte(`{"comment": "abc2", "rootfs": {"type": "layers"}}`))
assert.NilError(t, err)
id3, err := is.Create([]byte(`{"comment": "abc3", "rootfs": {"type": "layers"}}`))
assert.NilError(t, err)
assert.Check(t, is.SetParent(id, id2))
assert.Check(t, cmp.Len(is.Children(id2), 1))
assert.Check(t, is.SetParent(id, id3))
assert.Check(t, cmp.Len(is.Children(id2), 0))
assert.Check(t, cmp.Len(is.Children(id3), 1))
}
func defaultImageStore(t *testing.T) (Store, func()) {
fsBackend, cleanup := defaultFSStoreBackend(t)
mlgrMap := make(map[string]LayerGetReleaser)
mlgrMap[runtime.GOOS] = &mockLayerGetReleaser{}
store, err := NewImageStore(fsBackend, mlgrMap)
assert.NilError(t, err)
return store, cleanup
}
func TestGetAndSetLastUpdated(t *testing.T) {
store, cleanup := defaultImageStore(t)
defer cleanup()
id, err := store.Create([]byte(`{"comment": "abc1", "rootfs": {"type": "layers"}}`))
assert.NilError(t, err)
updated, err := store.GetLastUpdated(id)
assert.NilError(t, err)
assert.Check(t, cmp.Equal(updated.IsZero(), true))
assert.Check(t, store.SetLastUpdated(id))
updated, err = store.GetLastUpdated(id)
assert.NilError(t, err)
assert.Check(t, cmp.Equal(updated.IsZero(), false))
}
func TestStoreLen(t *testing.T) {
store, cleanup := defaultImageStore(t)
defer cleanup()
expected := 10
for i := 0; i < expected; i++ {
_, err := store.Create([]byte(fmt.Sprintf(`{"comment": "abc%d", "rootfs": {"type": "layers"}}`, i)))
assert.NilError(t, err)
}
numImages := store.Len()
assert.Equal(t, expected, numImages)
assert.Equal(t, len(store.Map()), numImages)
}
type mockLayerGetReleaser struct{}
func (ls *mockLayerGetReleaser) Get(layer.ChainID) (layer.Layer, error) {
return nil, nil
}
func (ls *mockLayerGetReleaser) Release(layer.Layer) ([]layer.Metadata, error) {
return nil, nil
}
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