75 lines
2.0 KiB
Go
75 lines
2.0 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package snapshotters
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import (
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"context"
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"fmt"
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"strings"
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"testing"
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digest "github.com/opencontainers/go-digest"
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imagespec "github.com/opencontainers/image-spec/specs-go/v1"
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"github.com/stretchr/testify/assert"
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)
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func TestImageLayersLabel(t *testing.T) {
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sampleKey := "sampleKey"
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sampleDigest, err := digest.Parse("sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
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assert.NoError(t, err)
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sampleMaxSize := 300
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sampleValidate := func(k, v string) error {
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if (len(k) + len(v)) > sampleMaxSize {
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return fmt.Errorf("invalid: %q: %q", k, v)
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}
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return nil
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}
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tests := []struct {
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name string
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layersNum int
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wantNum int
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}{
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{
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name: "valid number of layers",
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layersNum: 2,
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wantNum: 2,
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},
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{
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name: "many layers",
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layersNum: 5, // hits sampleMaxSize (300 chars).
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wantNum: 4, // layers should be omitted for avoiding invalid label.
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},
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}
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for _, tt := range tests {
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tt := tt
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t.Run(tt.name, func(t *testing.T) {
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sampleLayers := make([]imagespec.Descriptor, 0, tt.layersNum)
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for i := 0; i < tt.layersNum; i++ {
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sampleLayers = append(sampleLayers, imagespec.Descriptor{
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MediaType: imagespec.MediaTypeImageLayerGzip,
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Digest: sampleDigest,
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})
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}
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gotS := getLayers(context.Background(), sampleKey, sampleLayers, sampleValidate)
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got := len(strings.Split(gotS, ","))
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assert.Equal(t, tt.wantNum, got)
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})
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}
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}
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