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// Copyright 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package serializer
import (
"archive/tar"
"bytes"
"compress/gzip"
"fmt"
"io"
"log"
"os"
"reflect"
"sort"
"strings"
"testing"
"github.com/google/licenseclassifier"
"github.com/google/licenseclassifier/stringclassifier/searchset"
)
var (
apache20Header, mit []byte
normApache, normMIT string
)
func TestMain(m *testing.M) {
var err error
apache20Header, err = licenseclassifier.ReadLicenseFile("Apache-2.0.header.txt")
if err != nil {
log.Fatalf("error reading contents of Apache-2.0.header.txt: %v", err)
}
normApache = normalize(string(apache20Header))
mit, err = licenseclassifier.ReadLicenseFile("MIT.txt")
if err != nil {
log.Fatalf("error reading contents of MIT.txt: %v", err)
}
normMIT = normalize(string(mit))
os.Exit(m.Run())
}
type entry struct {
name string
size int64
contents string
}
func TestSerializer_ArchiveLicense(t *testing.T) {
tests := []struct {
description string
licenses []string
want []entry
}{
{
description: "Archiving Apache 2.0 header",
licenses: []string{"Apache-2.0.header.txt"},
want: []entry{
{
name: "Apache-2.0.header.txt",
size: int64(len(normApache)),
contents: normApache,
},
},
},
{
description: "Archiving Apache 2.0 header + MIT",
licenses: []string{"Apache-2.0.header.txt", "MIT.txt"},
want: []entry{
{
name: "Apache-2.0.header.txt",
size: int64(len(normApache)),
contents: normApache,
},
{
name: "MIT.txt",
size: int64(len(normMIT)),
contents: normMIT,
},
},
},
}
for _, tt := range tests {
var writer bytes.Buffer
if err := ArchiveLicenses(tt.licenses, &writer); err != nil {
t.Errorf("ArchiveLicenses(%q): cannot archive license: %v", tt.description, err)
continue
}
reader := bytes.NewReader(writer.Bytes())
gr, err := gzip.NewReader(reader)
if err != nil {
t.Errorf("ArchiveLicenses(%q): cannot create gzip reader: %v", tt.description, err)
continue
}
tr := tar.NewReader(gr)
for i := 0; ; i++ {
hdr, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
t.Errorf("ArchiveLicenses(%q): cannot read header: %v", tt.description, err)
break
}
if i >= len(tt.want)+1 {
t.Errorf("ArchiveLicenses(%q): too many files in tar, %d want %d", tt.description, i, len(tt.want))
break
}
if hdr.Name != tt.want[i].name {
t.Errorf("ArchiveLicenses(%q) = %+v, want %+v", tt.description, hdr.Name, tt.want[i].name)
}
if hdr.Size != tt.want[i].size {
t.Errorf("ArchiveLicenses(%q) = %v, want %v", tt.description, hdr.Size, tt.want[i].size)
}
var b bytes.Buffer
if _, err = io.Copy(&b, tr); err != nil {
t.Errorf("ArchiveLicenses(%q): cannot read contents: %v", tt.description, err)
break
}
if got, want := b.String(), tt.want[i].contents; got != want {
t.Errorf("ArchiveLicenses(%q) = got\n%s\nwant:\n%s", tt.description, got, want)
}
hdr, err = tr.Next()
if err != nil {
t.Errorf("ArchiveLicenses(%q): no hash file found in archive: %v", tt.description, err)
break
}
if hdr.Name != strings.TrimSuffix(tt.want[i].name, "txt")+"hash" {
t.Errorf("ArchiveLicenses(%q) = %+v, want %+v", tt.description, hdr.Name, strings.TrimSuffix(tt.want[i].name, "txt")+"hash")
}
b.Reset()
if _, err = io.Copy(&b, tr); err != nil {
t.Errorf("ArchiveLicenses(%q): cannot read contents: %v", tt.description, err)
break
}
var got searchset.SearchSet
if err := searchset.Deserialize(&b, &got); err != nil {
t.Errorf("ArchiveLicenses(%q): cannot deserialize search set: %v", tt.description, err)
break
}
want := searchset.New(tt.want[i].contents, searchset.DefaultGranularity)
if err := compareSearchSets(want, &got); err != nil {
t.Errorf("ArchiveLicenses(%q): search sets not equal: %v", tt.description, err)
break
}
}
}
}
type sortUInt32 []uint32
func (s sortUInt32) Len() int { return len(s) }
func (s sortUInt32) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
func (s sortUInt32) Less(i, j int) bool { return s[i] < s[j] }
func compareSearchSets(x, y *searchset.SearchSet) error {
// Check to see that the tokens are equal.
if len(x.Tokens) != len(y.Tokens) {
return fmt.Errorf("Lengths differ = %d vs %d", len(x.Tokens), len(y.Tokens))
}
for i := 0; i < len(x.Tokens); i++ {
if x.Tokens[i].Text != y.Tokens[i].Text {
return fmt.Errorf("Token values at %d differ = %q vs %q", i, x.Tokens[i].Text, y.Tokens[i].Text)
}
if x.Tokens[i].Offset != y.Tokens[i].Offset {
return fmt.Errorf("Token offsets at %d differ = %d vs %d", i, x.Tokens[i].Offset, y.Tokens[i].Offset)
}
}
// Now check that the hash maps are equal.
var xKeys []uint32
for k := range x.Hashes {
xKeys = append(xKeys, k)
}
var yKeys []uint32
for k := range y.Hashes {
yKeys = append(yKeys, k)
}
if len(xKeys) != len(yKeys) {
return fmt.Errorf("Lengths of hashes differ = %d vs %d", len(xKeys), len(yKeys))
}
sort.Sort(sortUInt32(xKeys))
sort.Sort(sortUInt32(yKeys))
for i := 0; i < len(xKeys); i++ {
if xKeys[i] != yKeys[i] {
return fmt.Errorf("Hash keys differ = %d vs %d", xKeys[i], yKeys[i])
}
if !reflect.DeepEqual(x.Hashes[xKeys[i]], y.Hashes[yKeys[i]]) {
return fmt.Errorf("Hash values differ = %v vs %v", x.Hashes[xKeys[i]], y.Hashes[yKeys[i]])
}
}
return nil
}
func normalize(s string) string {
for _, n := range licenseclassifier.Normalizers {
s = n(s)
}
return s
}
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