1 files changed, 41 insertions, 0 deletions
diff --git a/pkg/crane/export_test.go b/pkg/crane/export_test.go
new file mode 100644
index 0000000..e60e941
--- /dev/null
+++ b/pkg/crane/export_test.go
@@ -0,0 +1,41 @@
+// Copyright 2021 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 crane
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/google/go-containerregistry/pkg/v1/empty"
+	"github.com/google/go-containerregistry/pkg/v1/mutate"
+	"github.com/google/go-containerregistry/pkg/v1/static"
+	"github.com/google/go-containerregistry/pkg/v1/types"
+)
+
+func TestExport(t *testing.T) {
+	want := []byte(`{"foo":"bar"}`)
+	layer := static.NewLayer(want, types.MediaType("application/json"))
+	img, err := mutate.AppendLayers(empty.Image, layer)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var buf bytes.Buffer
+	if err := Export(img, &buf); err != nil {
+		t.Fatal(err)
+	}
+	if got := buf.Bytes(); !bytes.Equal(got, want) {
+		t.Errorf("got: %s\nwant: %s", got, want)
+	}
+}