github.com/google/osv-scalibr@v0.4.1/artifact/image/layerscanning/testing/fakeimage/fake_image.go (about)

     1  // Copyright 2025 Google LLC
     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 fakeimage provides a fake implementation of the image.Image interface for testing
    16  // purposes.
    17  package fakeimage
    18  
    19  import (
    20  	"github.com/google/osv-scalibr/artifact/image"
    21  	scalibrfs "github.com/google/osv-scalibr/fs"
    22  )
    23  
    24  // FakeImage is a fake implementation of the image.Image interface for testing purposes.
    25  type FakeImage struct {
    26  	FakeChainLayers []image.ChainLayer
    27  }
    28  
    29  // New returns a new FakeImage.
    30  func New(chainLayers []image.ChainLayer) *FakeImage {
    31  	return &FakeImage{
    32  		FakeChainLayers: chainLayers,
    33  	}
    34  }
    35  
    36  // Layers returns the layers of the image.
    37  func (i *FakeImage) Layers() ([]image.Layer, error) {
    38  	res := make([]image.Layer, len(i.FakeChainLayers))
    39  	for i, layer := range i.FakeChainLayers {
    40  		res[i] = layer.Layer()
    41  	}
    42  	return res, nil
    43  }
    44  
    45  // ChainLayers returns the chain layers of the image.
    46  func (i *FakeImage) ChainLayers() ([]image.ChainLayer, error) {
    47  	return i.FakeChainLayers, nil
    48  }
    49  
    50  // FS returns a SCALIBR compliant filesystem that represents the image.
    51  func (i *FakeImage) FS() scalibrfs.FS {
    52  	return i.FakeChainLayers[len(i.FakeChainLayers)-1].FS()
    53  }