syncthing/lib/weakhash/weakhash_test.go

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// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
// The existence of this file means we get 0% test coverage rather than no
// test coverage at all. Remove when implementing an actual test.
package weakhash
import (
"bytes"
"context"
"io"
"io/ioutil"
"os"
"reflect"
"testing"
)
var payload = []byte("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz")
func TestFinder(t *testing.T) {
f, err := ioutil.TempFile("", "")
if err != nil {
t.Error(err)
}
defer os.Remove(f.Name())
defer f.Close()
if _, err := f.Write(payload); err != nil {
t.Error(err)
}
if _, err := f.Seek(0, io.SeekStart); err != nil {
t.Error(err)
}
hashes := []uint32{65143183, 65798547}
finder, err := NewFinder(context.Background(), f, 4, hashes)
if err != nil {
t.Error(err)
}
expected := map[uint32][]int64{
2017-02-05 17:49:57 +00:00
65143183: {1, 27, 53, 79},
65798547: {2, 28, 54, 80},
}
actual := make(map[uint32][]int64)
b := make([]byte, Size)
for _, hash := range hashes {
_, err := finder.Iterate(hash, b[:4], func(offset int64) bool {
if !bytes.Equal(b, payload[offset:offset+4]) {
t.Errorf("Not equal at %d: %s != %s", offset, string(b), string(payload[offset:offset+4]))
}
actual[hash] = append(actual[hash], offset)
return true
})
if err != nil {
t.Error(err)
}
}
if !reflect.DeepEqual(actual, expected) {
t.Errorf("Not equal: %#v != %#v", actual, expected)
}
}