signatures_test.go

Documentation: github.com/sigstore/cosign/v2/pkg/oci/mutate

     1  //
     2  // Copyright 2021 The Sigstore Authors.
     3  //
     4  // Licensed under the Apache License, Version 2.0 (the "License");
     5  // you may not use this file except in compliance with the License.
     6  // You may obtain a copy of the License at
     7  //
     8  //     http://www.apache.org/licenses/LICENSE-2.0
     9  //
    10  // Unless required by applicable law or agreed to in writing, software
    11  // distributed under the License is distributed on an "AS IS" BASIS,
    12  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  // See the License for the specific language governing permissions and
    14  // limitations under the License.
    15  
    16  package mutate
    17  
    18  import (
    19  	"errors"
    20  	"testing"
    21  
    22  	v1 "github.com/google/go-containerregistry/pkg/v1"
    23  	"github.com/sigstore/cosign/v2/pkg/oci"
    24  	"github.com/sigstore/cosign/v2/pkg/oci/empty"
    25  	"github.com/sigstore/cosign/v2/pkg/oci/static"
    26  )
    27  
    28  func TestAppendSignatures(t *testing.T) {
    29  	base := empty.Signatures()
    30  
    31  	s1, err := static.NewSignature([]byte{}, "s1")
    32  	if err != nil {
    33  		t.Fatalf("NewSignature() = %v", err)
    34  	}
    35  	s2, err := static.NewSignature([]byte{}, "s2")
    36  	if err != nil {
    37  		t.Fatalf("NewSignature() = %v", err)
    38  	}
    39  	s3, err := static.NewSignature([]byte{}, "s3")
    40  	if err != nil {
    41  		t.Fatalf("NewSignature() = %v", err)
    42  	}
    43  
    44  	oneSig, err := AppendSignatures(base, false, s1)
    45  	if err != nil {
    46  		t.Fatalf("AppendSignatures() = %v", err)
    47  	}
    48  
    49  	twoSig, err := AppendSignatures(oneSig, false, s2)
    50  	if err != nil {
    51  		t.Fatalf("AppendSignatures() = %v", err)
    52  	}
    53  
    54  	threeSig, err := AppendSignatures(oneSig, true, s2, s3)
    55  	if err != nil {
    56  		t.Fatalf("AppendSignatures() = %v", err)
    57  	}
    58  
    59  	if sl, err := oneSig.Get(); err != nil {
    60  		t.Fatalf("Get() = %v", err)
    61  	} else if got, want := len(sl), 1; got != want {
    62  		t.Errorf("len(Get()) = %d, wanted %d", got, want)
    63  	}
    64  
    65  	if sl, err := twoSig.Get(); err != nil {
    66  		t.Fatalf("Get() = %v", err)
    67  	} else if got, want := len(sl), 2; got != want {
    68  		t.Errorf("len(Get()) = %d, wanted %d", got, want)
    69  	}
    70  
    71  	if sl, err := threeSig.Get(); err != nil {
    72  		t.Fatalf("Get() = %v", err)
    73  	} else if got, want := len(sl), 3; got != want {
    74  		t.Errorf("len(Get()) = %d, wanted %d", got, want)
    75  	}
    76  
    77  	if testCfg, err := threeSig.ConfigFile(); err != nil {
    78  		t.Fatalf("ConfigFile() = %v", err)
    79  	} else if testCfg.Created.Time.IsZero() {
    80  		t.Errorf("Date of Signature was Zero")
    81  	}
    82  
    83  	if testDefaultCfg, err := twoSig.ConfigFile(); err != nil {
    84  		t.Fatalf("ConfigFile() = %v", err)
    85  	} else if !testDefaultCfg.Created.Time.IsZero() {
    86  		t.Errorf("Date of Signature was Zero")
    87  	}
    88  }
    89  
    90  func TestGet(t *testing.T) {
    91  	tests := []struct {
    92  		name         string
    93  		baseLayers   int
    94  		appendLayers int
    95  		wantError    error
    96  	}{
    97  		{
    98  			name:         "within limit",
    99  			baseLayers:   1,
   100  			appendLayers: 1,
   101  			wantError:    nil,
   102  		},
   103  		{
   104  			name:         "base exceeds limit",
   105  			baseLayers:   2000,
   106  			appendLayers: 1,
   107  			wantError:    errors.New("number of layers (2001) exceeded the limit (1000)"),
   108  		},
   109  		{
   110  			name:         "append exceeds limit",
   111  			baseLayers:   1,
   112  			appendLayers: 1300,
   113  			wantError:    errors.New("number of layers (1301) exceeded the limit (1000)"),
   114  		},
   115  		{
   116  			name:         "sum exceeds limit",
   117  			baseLayers:   666,
   118  			appendLayers: 666,
   119  			wantError:    errors.New("number of layers (1332) exceeded the limit (1000)"),
   120  		},
   121  	}
   122  	for _, test := range tests {
   123  		t.Run(test.name, func(t *testing.T) {
   124  			sa := sigAppender{
   125  				base: &mockOCISignatures{
   126  					signatures: make([]oci.Signature, test.baseLayers),
   127  				},
   128  				sigs: make([]oci.Signature, test.appendLayers),
   129  			}
   130  			_, err := sa.Get()
   131  			if test.wantError != nil && test.wantError.Error() != err.Error() {
   132  				t.Fatalf("Get() = %v, wanted %v", err, test.wantError)
   133  			}
   134  			if test.wantError == nil && err != nil {
   135  				t.Fatalf("Get() = %v, wanted %v", err, test.wantError)
   136  			}
   137  		})
   138  	}
   139  }
   140  
   141  type mockOCISignatures struct {
   142  	v1.Image
   143  	signatures []oci.Signature
   144  }
   145  
   146  func (m *mockOCISignatures) Get() ([]oci.Signature, error) {
   147  	return m.signatures, nil
   148  }
   149
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