error_roundtrip_test.go

Documentation: github.com/google/go-containerregistry/pkg/v1/remote

     1  // Copyright 2019 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 remote_test
    16  
    17  import (
    18  	"errors"
    19  	"fmt"
    20  	"log"
    21  	"net/http"
    22  	"net/http/httptest"
    23  	"strings"
    24  	"testing"
    25  
    26  	"github.com/google/go-containerregistry/pkg/name"
    27  	"github.com/google/go-containerregistry/pkg/registry"
    28  	"github.com/google/go-containerregistry/pkg/v1/random"
    29  	"github.com/google/go-containerregistry/pkg/v1/remote"
    30  	"github.com/google/go-containerregistry/pkg/v1/remote/transport"
    31  )
    32  
    33  func TestStatusCodeReturned(t *testing.T) {
    34  	tcs := []struct {
    35  		Description string
    36  		Handler     http.Handler
    37  	}{{
    38  		Description: "Only returns teapot status",
    39  		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    40  			w.WriteHeader(http.StatusTeapot)
    41  		}),
    42  	}, {
    43  		Description: "Handle v2, returns teapot status else",
    44  		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    45  			log.Print(r.URL.Path)
    46  			if r.URL.Path == "/v2/" {
    47  				return
    48  			}
    49  			w.WriteHeader(http.StatusTeapot)
    50  		}),
    51  	}}
    52  
    53  	for _, tc := range tcs {
    54  		t.Run(tc.Description, func(t *testing.T) {
    55  			o := httptest.NewServer(tc.Handler)
    56  			defer o.Close()
    57  
    58  			ref, err := name.NewDigest(strings.TrimPrefix(o.URL+"/foo:@sha256:53b27244ffa2f585799adbfaf79fba5a5af104597751b289c8b235e7b8f7ebf5", "http://"))
    59  
    60  			if err != nil {
    61  				t.Fatalf("Unable to parse digest: %v", err)
    62  			}
    63  
    64  			_, err = remote.Image(ref)
    65  			var terr *transport.Error
    66  			if !errors.As(err, &terr) {
    67  				t.Fatalf("Unable to cast error to transport error: %v", err)
    68  			}
    69  			if terr.StatusCode != http.StatusTeapot {
    70  				t.Errorf("Incorrect status code received, got %v, wanted %v", terr.StatusCode, http.StatusTeapot)
    71  			}
    72  		})
    73  	}
    74  }
    75  
    76  func TestBlobStatusCodeReturned(t *testing.T) {
    77  	reg := registry.New()
    78  	rh := httptest.NewServer(reg)
    79  	defer rh.Close()
    80  	i, _ := random.Image(1024, 16)
    81  	tag := strings.TrimPrefix(fmt.Sprintf("%s/foo:bar", rh.URL), "http://")
    82  	d, _ := name.NewTag(tag)
    83  	if err := remote.Write(d, i); err != nil {
    84  		t.Fatalf("Unable to write empty image: %v", err)
    85  	}
    86  
    87  	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    88  		log.Print(r.URL.Path)
    89  		if strings.Contains(r.URL.Path, "blob") {
    90  			w.WriteHeader(http.StatusTeapot)
    91  			return
    92  		}
    93  		reg.ServeHTTP(w, r)
    94  	})
    95  
    96  	o := httptest.NewServer(handler)
    97  	defer o.Close()
    98  
    99  	ref, err := name.NewTag(strings.TrimPrefix(fmt.Sprintf("%s/foo:bar", o.URL), "http://"))
   100  	if err != nil {
   101  		t.Fatalf("Unable to parse digest: %v", err)
   102  	}
   103  
   104  	ri, err := remote.Image(ref)
   105  	if err != nil {
   106  		t.Fatalf("Unable to fetch manifest: %v", err)
   107  	}
   108  	l, err := ri.Layers()
   109  	if err != nil {
   110  		t.Fatalf("Unable to fetch layers: %v", err)
   111  	}
   112  	_, err = l[0].Compressed()
   113  	var terr *transport.Error
   114  	if !errors.As(err, &terr) {
   115  		t.Fatalf("Unable to cast error to transport error: %v", err)
   116  	}
   117  	if terr.StatusCode != http.StatusTeapot {
   118  		t.Errorf("Incorrect status code received, got %v, wanted %v", terr.StatusCode, http.StatusTeapot)
   119  	}
   120  	_, err = l[0].Uncompressed()
   121  	if !errors.As(err, &terr) {
   122  		t.Fatalf("Unable to cast error to transport error: %v", err)
   123  	}
   124  	if terr.StatusCode != http.StatusTeapot {
   125  		t.Errorf("Incorrect status code received, got %v, wanted %v", terr.StatusCode, http.StatusTeapot)
   126  	}
   127  }
   128
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