export_test.go

Documentation: github.com/google/go-containerregistry/pkg/crane

     1  // Copyright 2021 Google LLC All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //    http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package crane
    16  
    17  import (
    18  	"bytes"
    19  	"testing"
    20  
    21  	"github.com/google/go-containerregistry/pkg/v1/empty"
    22  	"github.com/google/go-containerregistry/pkg/v1/mutate"
    23  	"github.com/google/go-containerregistry/pkg/v1/static"
    24  	"github.com/google/go-containerregistry/pkg/v1/types"
    25  )
    26  
    27  func TestExport(t *testing.T) {
    28  	want := []byte(`{"foo":"bar"}`)
    29  	layer := static.NewLayer(want, types.MediaType("application/json"))
    30  	img, err := mutate.AppendLayers(empty.Image, layer)
    31  	if err != nil {
    32  		t.Fatal(err)
    33  	}
    34  	var buf bytes.Buffer
    35  	if err := Export(img, &buf); err != nil {
    36  		t.Fatal(err)
    37  	}
    38  	if got := buf.Bytes(); !bytes.Equal(got, want) {
    39  		t.Errorf("got: %s\nwant: %s", got, want)
    40  	}
    41  }
    42
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