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// Copyright 2020 Northern.tech AS
//
// 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 artifact
import (
"bytes"
"io"
"io/ioutil"
"os"
"testing"
"github.com/stretchr/testify/assert"
)
const (
checksumData = "this is test checksum data"
sumData = "00beab03a67bac97343603854a374671e978a01a8791d1526cb75ae92967fd50"
checksumBigData = `ajkshfdkjahsdfjkahsdfkjhasdfkjhasdkjfaksjdfhakjsdhfaksjdh
asdfasdfjasdlfjaslkdjflkasjdflkasjdflkasjdflkajsdlfkjasldfjalksdjflkasdjflkasd
ajkshfdkjahsdfjkahsdfkjhasdfkjhasdkjfaksjdfhakjsdhfaksjdhfakjsdhfaksdjfhalksjd
asdfasdfjasdlfjaslkdjflkasjdflkasjdflkasjdflkajsdlfkjasldfjalksdjflkasdjflkasd
ajkshfdkjahsdfjkahsdfkjhasdfkjhasdkjfaksjdfhakjsdhfaksjdhfakjsdhfaksdjfhalksjd
asdfasdfjasdlfjaslkdjflkasjdflkasjdflkasjdflkajsdlfkjasldfjalksdjflkasdjflkasd
ajkshfdkjahsdfjkahsdfkjhasdfkjhasdkjfaksjdfhakjsdhfaksjdhfakjsdhfaksdjfhalksjd
asdfasdfjasdlfjaslkdjflkasjdflkasjdflkasjdflkajsdlfkjasldfjalksdjflkasdjflkasd
ajkshfdkjahsdfjkahsdfkjhasdfkjhasdkjfaksjdfhakjsdhfaksjdhfakjsdhfaksdjfhalksjd
asdfasdfjasdlfjaslkdjflkasjdflkasjdflkasjdflkajsdlfkjasldfjalksdjflkasdjflkasd
ajkshfdkjahsdfjkahsdfkjhasdfkjhasdkjfaksjdfhakjsdhfaksjdhfakjsdhfaksdjfhalksjd
asdfasdfjasdlfjaslkdjflkasjdflkasjdflkasjdflkajsdlfkjasldfjalksdjflkasdjflkasd
ajkshfdkjahsdfjkahsdfkjhasdfkjhasdkjfaksjdfhakjsdhfaksjdhfakjsdhfaksdjfhalksjd
asdfasdfjasdlfjaslkdjflkasjdflkasjdflkasjdflkajsdlfkjasldfjalksdjflkasdjflkasd
`
sumBigData = "1a21d16c585551950f516151c5caba996140b2c8f3390dac0d8042d5d96e5216"
)
// Taken from io packege for testing purposes
// copyBuffer is the actual implementation of Copy and CopyBuffer.
// if buf is nil, one is allocated.
func copyBuffer(dst io.Writer, src io.Reader) (written int64, err error) {
buf := make([]byte, 128)
for {
nr, er := src.Read(buf)
if nr > 0 {
nw, ew := dst.Write(buf[0:nr])
if nw > 0 {
written += int64(nw)
}
if ew != nil {
err = ew
break
}
if nr != nw {
err = io.ErrShortWrite
break
}
}
if er == io.EOF {
break
}
if er != nil {
err = er
break
}
}
return written, err
}
func TestChecksumWrite(t *testing.T) {
buf := bytes.NewBuffer(nil)
w := NewWriterChecksum(buf)
data := bytes.NewBuffer([]byte(checksumData))
n, err := io.Copy(w, data)
assert.NoError(t, err)
assert.Equal(t, int64(len(checksumData)), n)
assert.Equal(t, []byte(sumData), w.Checksum())
assert.Equal(t, checksumData, buf.String())
w = NewWriterChecksum(nil)
i, err := w.Write([]byte(checksumData))
assert.Error(t, err)
assert.Equal(t, 0, i)
assert.Nil(t, w.Checksum())
}
func TestChecksumRead(t *testing.T) {
sum := bytes.NewBuffer([]byte(checksumData))
r := NewReaderChecksum(sum, []byte(sumData))
n, err := io.Copy(ioutil.Discard, r)
assert.NoError(t, err)
assert.Equal(t, int64(len(checksumData)), n)
r = NewReaderChecksum(nil, nil)
n, err = io.Copy(ioutil.Discard, r)
assert.Error(t, err)
assert.Zero(t, n)
sum = bytes.NewBuffer([]byte(checksumData))
r = NewReaderChecksum(sum, []byte("12121212"))
_, err = io.Copy(ioutil.Discard, r)
assert.Error(t, err)
}
func TestChecksumReadBigData(t *testing.T) {
sum := bytes.NewBuffer([]byte(checksumBigData))
r := NewReaderChecksum(sum, []byte(sumBigData))
n, err := copyBuffer(ioutil.Discard, r)
assert.NoError(t, err)
assert.Equal(t, int64(len(checksumBigData)), n)
}
func TestStore(t *testing.T) {
s := NewChecksumStore()
err := s.Add("test", []byte("1234567890"))
assert.NoError(t, err)
sum, err := s.Get("test")
assert.NoError(t, err)
assert.Equal(t, []byte("1234567890"), sum)
// can not add the same sum multiple times
err = s.Add("test", []byte("1212121212"))
assert.Equal(t, err, os.ErrExist)
sum, err = s.Get("test")
assert.NoError(t, err)
assert.Equal(t, []byte("1234567890"), sum)
sum, err = s.Get("non-existing")
assert.Error(t, err)
assert.Nil(t, sum)
raw := s.GetRaw()
assert.Equal(t, raw, []byte("1234567890 test\n"))
// already exists
err = s.ReadRaw([]byte("1234567890 test\n"))
assert.Equal(t, err, os.ErrExist)
assert.Equal(t, []byte("1234567890 test\n"), s.GetRaw())
err = s.ReadRaw([]byte("1212121212 version\n"))
assert.NoError(t, err)
assert.Equal(t, []byte("1234567890 test\n1212121212 version\n"), s.GetRaw())
// malformed input
err = s.ReadRaw([]byte("1212121212\n"))
assert.Error(t, err)
assert.Equal(t, []byte("1234567890 test\n1212121212 version\n"), s.GetRaw())
}
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