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//
// Copyright 2021 The Sigstore Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package mutate
import (
"context"
"errors"
"testing"
"github.com/google/go-containerregistry/pkg/v1/mutate"
"github.com/google/go-containerregistry/pkg/v1/random"
"github.com/google/go-containerregistry/pkg/v1/types"
"github.com/sigstore/cosign/v2/pkg/oci"
"github.com/sigstore/cosign/v2/pkg/oci/signed"
)
func TestMapImage(t *testing.T) {
i, err := random.Image(300 /* bytes */, 3 /* layers */)
if err != nil {
t.Fatalf("random.Image() = %v", err)
}
si := signed.Image(i)
t.Run("one call to identity mutator", func(t *testing.T) {
calls := 0
rsi, err := Map(context.Background(), si, func(_ context.Context, se oci.SignedEntity) (oci.SignedEntity, error) {
calls++
return se, nil
})
if err != nil {
t.Fatalf("Map() = %v", err)
}
if rsi != si {
t.Fatalf("Map() = %#v, wanted %#v", rsi, si)
}
if calls != 1 {
t.Fatalf("Map called %d times, wanted 1", calls)
}
})
t.Run("error propagates", func(t *testing.T) {
want := errors.New("this is the error I expect")
_, got := Map(context.Background(), si, func(_ context.Context, _ oci.SignedEntity) (oci.SignedEntity, error) {
return nil, want
})
if !errors.Is(got, want) {
t.Fatalf("Map() = %v, wanted %v", got, want)
}
})
t.Run("new result image", func(t *testing.T) {
i, err := random.Image(300 /* bytes */, 3 /* layers */)
if err != nil {
t.Fatalf("random.Image() = %v", err)
}
want := signed.Image(i)
got, err := Map(context.Background(), si, func(_ context.Context, _ oci.SignedEntity) (oci.SignedEntity, error) {
return want, nil
})
if err != nil {
t.Fatalf("Map() = %v", err)
}
if got != want {
t.Fatalf("Map() = %#v, wanted %#v", got, want)
}
})
t.Run("filtered image", func(t *testing.T) {
got, err := Map(context.Background(), si, func(_ context.Context, _ oci.SignedEntity) (oci.SignedEntity, error) {
return nil, nil
})
if err != nil {
t.Fatalf("Map() = %v", err)
}
if got != nil {
t.Fatalf("Map() = %#v, wanted nil", got)
}
})
}
func TestMapImageIndex(t *testing.T) {
ii, err := random.Index(300 /* bytes */, 3 /* layers */, 2 /* images */)
if err != nil {
t.Fatalf("random.Image() = %v", err)
}
ii2, err := random.Index(300 /* bytes */, 3 /* layers */, 2 /* images */)
if err != nil {
t.Fatalf("random.Image() = %v", err)
}
sii := signed.ImageIndex(mutate.AppendManifests(ii, mutate.IndexAddendum{
Add: ii2,
}))
t.Run("six calls to identity mutator", func(t *testing.T) {
calls := 0
after := 0
rsi, err := Map(context.Background(), sii, func(ctx context.Context, se oci.SignedEntity) (oci.SignedEntity, error) {
calls++
if IsAfterChildren(ctx) {
after++
}
return se, nil
})
if err != nil {
t.Fatalf("Map() = %v", err)
}
if rsi != sii {
t.Fatalf("Map() = %#v, wanted %#v", rsi, sii)
}
if calls != 6 {
t.Fatalf("Map called %d times, wanted 6", calls)
}
if after != 0 {
t.Fatalf("Map called %d times (w/ after), wanted 0", after)
}
})
t.Run("just one call to root index w/ ErrSkipChildren", func(t *testing.T) {
calls := 0
_, err := Map(context.Background(), sii, func(_ context.Context, se oci.SignedEntity) (oci.SignedEntity, error) {
calls++
if se != sii {
t.Errorf("Wanted mutator called on %#v, got call on %#v", sii, se)
}
return se, ErrSkipChildren
})
if err != nil {
t.Fatalf("Map() = %v", err)
}
if calls != 1 {
t.Fatalf("Map called %d times, wanted 1", calls)
}
})
t.Run("two calls to mutator with IsAfterChildren", func(t *testing.T) {
before := 0
after := 0
rsi, err := Map(context.Background(), sii, func(ctx context.Context, se oci.SignedEntity) (oci.SignedEntity, error) {
if IsBeforeChildren(ctx) {
before++
}
if IsAfterChildren(ctx) {
after++
}
if sii, ok := se.(oci.SignedImageIndex); ok {
return sii, nil
}
i, err := random.Image(300 /* bytes */, 3 /* layers */)
if err != nil {
t.Fatalf("random.Image() = %v", err)
}
return signed.Image(i), nil
})
if err != nil {
t.Fatalf("Map() = %v", err)
}
if rsi == sii {
t.Fatalf("Map() = %#v, wanted something new!", rsi)
}
if before != 2 {
t.Fatalf("Map called %d times (w/ before), wanted 2", before)
}
if after != 2 {
t.Fatalf("Map called %d times (w/ after), wanted 2", after)
}
})
t.Run("test filtering images", func(t *testing.T) {
rsi, err := Map(context.Background(), sii, func(_ context.Context, se oci.SignedEntity) (oci.SignedEntity, error) {
if _, ok := se.(oci.SignedImage); ok {
return nil, nil
}
return se, nil
})
if err != nil {
t.Fatalf("Map() = %v", err)
}
if rsi == sii {
t.Fatalf("Map() = %#v, wanted something new!", rsi)
}
// Make sure no images remain!
im, err := rsi.(oci.SignedImageIndex).IndexManifest()
if err != nil {
t.Fatalf("IndexManifest() = %v", err)
}
for _, desc := range im.Manifests {
if desc.MediaType == types.DockerManifestSchema2 {
t.Error("Found an image media type!")
}
}
})
t.Run("test filtering indices", func(t *testing.T) {
rsi, err := Map(context.Background(), sii, func(ctx context.Context, se oci.SignedEntity) (oci.SignedEntity, error) {
if IsBeforeChildren(ctx) && se != sii {
return nil, nil
}
return se, nil
})
if err != nil {
t.Fatalf("Map() = %v", err)
}
if rsi == sii {
t.Fatalf("Map() = %#v, wanted something new!", rsi)
}
// Make sure no indices remain!
im, err := rsi.(oci.SignedImageIndex).IndexManifest()
if err != nil {
t.Fatalf("IndexManifest() = %v", err)
}
for _, desc := range im.Manifests {
if desc.MediaType != types.DockerManifestSchema2 {
t.Errorf("MediaType = %s, wanted %s", desc.MediaType, types.DockerManifestSchema2)
}
}
})
t.Run("error propagates from child image", func(t *testing.T) {
want := errors.New("this is the error I expect")
_, got := Map(context.Background(), sii, func(_ context.Context, se oci.SignedEntity) (oci.SignedEntity, error) {
if _, ok := se.(oci.SignedImage); !ok {
return se, nil
}
return nil, want
})
if !errors.Is(got, want) {
t.Fatalf("Map() = %v, wanted %v", got, want)
}
})
t.Run("error propagates from child index", func(t *testing.T) {
want := errors.New("this is the error I expect")
_, got := Map(context.Background(), sii, func(ctx context.Context, se oci.SignedEntity) (oci.SignedEntity, error) {
if IsBeforeChildren(ctx) && se != sii {
return nil, want
}
return se, nil
})
if !errors.Is(got, want) {
t.Fatalf("Map() = %v, wanted %v", got, want)
}
})
}
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