mesh-catalog/modules/artifact-store-tools/internal/registry/blob_test.go

package registry

import (
	"context"
	"crypto/sha256"
	"encoding/hex"
	"errors"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

// A take-in reads a templates archive by its reference, and only bytes of the digest the reference names.
func TestGetBlobReadsOnlyTheBytesOfItsDigest(t *testing.T) {
	good := []byte("the archive")
	sum := sha256.Sum256(good)
	digest := "sha256:" + hex.EncodeToString(sum[:])
	liar := "sha256:" + strings.Repeat("0", 64)
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch {
		case strings.HasSuffix(r.URL.Path, "/x/files/blobs/"+digest), strings.HasSuffix(r.URL.Path, "/x/files/blobs/"+liar):
			_, _ = w.Write(good)
		default:
			w.WriteHeader(http.StatusNotFound)
		}
	}))
	defer server.Close()
	s := Store{Address: strings.TrimPrefix(server.URL, "http://")}
	ctx := context.Background()
	body, err := s.GetBlob(ctx, "artifact-store://x/files/blobs/"+digest)
	if err != nil || string(body) != string(good) {
		t.Fatalf("the archive: %q %v", body, err)
	}
	if _, err := s.GetBlob(ctx, "artifact-store://x/files/blobs/"+liar); err == nil || !strings.Contains(err.Error(), "refused") {
		t.Fatalf("bytes of another digest are read: %v", err)
	}
	if _, err := s.GetBlob(ctx, "artifact-store://x/other/blobs/"+digest); !errors.Is(err, Gone) {
		t.Fatalf("a blob the store does not hold: %v", err)
	}
	if _, err := s.GetBlob(ctx, "registry.example/x@"+digest); !errors.Is(err, ErrNotOurs) {
		t.Fatalf("a reference outside the store: %v", err)
	}
}