1 files changed, 119 insertions, 0 deletions
diff --git a/pkg/v1/partial/index_test.go b/pkg/v1/partial/index_test.go
new file mode 100644
index 0000000..c289758
--- /dev/null
+++ b/pkg/v1/partial/index_test.go
@@ -0,0 +1,119 @@
+// Copyright 2020 Google LLC All Rights Reserved.
+//
+// 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 partial_test
+
+import (
+	"testing"
+
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	"github.com/google/go-containerregistry/pkg/v1/empty"
+	"github.com/google/go-containerregistry/pkg/v1/mutate"
+	"github.com/google/go-containerregistry/pkg/v1/partial"
+	"github.com/google/go-containerregistry/pkg/v1/random"
+	"github.com/google/go-containerregistry/pkg/v1/types"
+)
+
+func TestFindManifests(t *testing.T) {
+	ii, err := random.Index(100, 5, 6) // random image of 6 manifests, each having 5 layers of size 100
+	if err != nil {
+		t.Fatal("could not create random index:", err)
+	}
+	m, _ := ii.IndexManifest()
+	digest := m.Manifests[0].Digest
+
+	matcher := func(desc v1.Descriptor) bool {
+		return desc.Digest != digest
+	}
+
+	descriptors, err := partial.FindManifests(ii, matcher)
+	expected := len(m.Manifests) - 1
+	switch {
+	case err != nil:
+		t.Error("unexpected error:", err)
+	case len(descriptors) != expected:
+		t.Errorf("failed on manifests, actual %d, expected %d", len(descriptors), expected)
+	}
+}
+
+func TestFindImages(t *testing.T) {
+	// create our imageindex with which to work
+	ii, err := random.Index(100, 5, 6) // random image of 6 manifests, each having 5 layers of size 100
+	if err != nil {
+		t.Fatal("could not create random index:", err)
+	}
+	m, _ := ii.IndexManifest()
+	digest := m.Manifests[0].Digest
+
+	matcher := func(desc v1.Descriptor) bool {
+		return desc.Digest != digest
+	}
+	images, err := partial.FindImages(ii, matcher)
+	expected := len(m.Manifests) - 1
+	switch {
+	case err != nil:
+		t.Error("unexpected error:", err)
+	case len(images) != expected:
+		t.Errorf("failed on images, actual %d, expected %d", len(images), expected)
+	}
+}
+
+func TestFindIndexes(t *testing.T) {
+	// there is no utility to generate an index of indexes, so we need to create one
+	// base index
+	var (
+		indexCount = 5
+		imageCount = 7
+	)
+	base := empty.Index
+	// we now have 5 indexes and 5 images, so wrap them into a single index
+	adds := []mutate.IndexAddendum{}
+	for i := 0; i < indexCount; i++ {
+		ii, err := random.Index(100, 1, 1)
+		if err != nil {
+			t.Fatalf("%d: unable to create random index: %v", i, err)
+		}
+		adds = append(adds, mutate.IndexAddendum{
+			Add: ii,
+			Descriptor: v1.Descriptor{
+				MediaType: types.OCIImageIndex,
+			},
+		})
+	}
+	for i := 0; i < imageCount; i++ {
+		img, err := random.Image(100, 1)
+		if err != nil {
+			t.Fatalf("%d: unable to create random image: %v", i, err)
+		}
+		adds = append(adds, mutate.IndexAddendum{
+			Add: img,
+			Descriptor: v1.Descriptor{
+				MediaType: types.OCIManifestSchema1,
+			},
+		})
+	}
+
+	// just see if it finds all of the indexes
+	matcher := func(desc v1.Descriptor) bool {
+		return true
+	}
+	index := mutate.AppendManifests(base, adds...)
+	idxes, err := partial.FindIndexes(index, matcher)
+	switch {
+	case err != nil:
+		t.Error("unexpected error:", err)
+	case len(idxes) != indexCount:
+		t.Errorf("failed on index, actual %d, expected %d", len(idxes), indexCount)
+	}
+}