func testCompressDecompress(t *testing.T, size int64, algo AlgorithmType, useReadFrom, useWriteTo bool) {
// Fake data file is written to disk,
// as compression reader has to be a ReadSeeker.
testutil.Remover(t, ZipFilePath)
data := testutil.CreateDummyBuf(size)
zipFileDest := openDest(t, ZipFilePath)
defer testutil.Remover(t, ZipFilePath)
// Compress.
w, err := NewWriter(zipFileDest, algo)
if err != nil {
t.Errorf("Writer init failed %v", err)
return
}
if _, err := testutil.DumbCopy(w, bytes.NewReader(data), useReadFrom, useWriteTo); err != nil {
t.Errorf("Compress failed %v", err)
return
}
if err := w.Close(); err != nil {
t.Errorf("Compression writer close failed: %v", err)
return
}
if err := zipFileDest.Close(); err != nil {
t.Errorf("close(zipFileDest) failed: %v", err)
return
}
// Read compressed file into buffer.
dataUncomp := bytes.NewBuffer(nil)
dataFromZip := openSrc(t, ZipFilePath)
// Uncompress.
r := NewReader(dataFromZip)
if _, err := testutil.DumbCopy(dataUncomp, r, useReadFrom, useWriteTo); err != nil {
t.Errorf("Decompression failed: %v", err)
return
}
if err := dataFromZip.Close(); err != nil {
t.Errorf("Zip close failed: %v", err)
return
}
// Compare.
got, want := dataUncomp.Bytes(), data
if !bytes.Equal(got, want) {
t.Error("Uncompressed data and input data does not match.")
t.Errorf("\tGOT: %v", util.OmitBytes(got, 10))
t.Errorf("\tWANT: %v", util.OmitBytes(want, 10))
return
}
}
func testSeek(t *testing.T, N int64, readFrom, writeTo bool) {
sourceData := testutil.CreateDummyBuf(N)
source := bytes.NewBuffer(sourceData)
shared := &bytes.Buffer{}
t.Logf("Testing seek for size %d", N)
enc, err := NewWriter(shared, TestKey)
if err != nil {
t.Errorf("Creating an encrypted writer failed: %v", err)
return
}
// Encrypt:
if _, err = testutil.DumbCopy(enc, source, readFrom, writeTo); err != nil {
t.Errorf("copy(enc, source) failed %v", err)
return
}
// This needs to be here, since close writes
// left over data to the write stream
if err = enc.Close(); err != nil {
t.Errorf("close(enc): %v", err)
return
}
sharedReader := bytes.NewReader(shared.Bytes())
decLayer, err := NewReader(sharedReader, TestKey)
if err != nil {
t.Errorf("creating new reader failed: %v", err)
return
}
lastJump := int64(0)
for _, test := range SeekTests {
realOffset := int64(math.Floor(.5 + test.Offset*float64(N)))
whence := map[int]string{
0: "SEEK_SET",
1: "SEEK_CUR",
2: "SEEK_END",
}[test.Whence]
exptOffset := int64(0)
switch test.Whence {
case os.SEEK_SET:
exptOffset = realOffset
case os.SEEK_CUR:
exptOffset = lastJump + realOffset
case os.SEEK_END:
exptOffset = N + realOffset
default:
panic("Bad whence")
}
t.Logf(
" => Seek(%v, %v) -> %v (size: %v)",
realOffset,
whence,
exptOffset,
N,
)
jumpedTo, err := decLayer.Seek(realOffset, test.Whence)
if err != test.Error {
if err != io.EOF && N != 0 {
t.Errorf(
"Seek(%v, %v) produced an error: %v (should be %v)",
realOffset,
whence,
err,
test.Error,
)
}
return
}
if test.Error != nil {
continue
}
if jumpedTo != exptOffset {
t.Errorf(
"Seek(%v, %v) jumped badly. Should be %v, was %v",
realOffset,
whence,
exptOffset,
jumpedTo,
)
return
}
lastJump = jumpedTo
// Decrypt and check if the contents are okay:
dest := bytes.NewBuffer(nil)
copiedBytes, err := testutil.DumbCopy(dest, decLayer, readFrom, writeTo)
if err != nil {
t.Errorf("Decrypt failed: %v", err)
return
}
if copiedBytes != N-jumpedTo {
t.Errorf("Copied different amount of decrypted data than expected.")
t.Errorf("Should be %v, was %v bytes.", N-jumpedTo, copiedBytes)
}
// Check the data actually matches the source data.
if !bytes.Equal(sourceData[jumpedTo:], dest.Bytes()) {
t.Errorf("Seeked data does not match expectations.")
t.Errorf("\tEXPECTED: %v", util.OmitBytes(sourceData[jumpedTo:], 10))
t.Errorf("\tGOT: %v", util.OmitBytes(dest.Bytes(), 10))
return
}
// Jump back, so the other tests continue to work:
jumpedAgain, err := decLayer.Seek(jumpedTo, os.SEEK_SET)
if err != nil {
t.Errorf("Seeking not possible after reading: %v", err)
return
}
if jumpedTo != jumpedAgain {
t.Errorf("Jumping back to original pos failed.")
t.Errorf("Should be %v, was %v.", jumpedTo, jumpedAgain)
return
}
}
}
func testSeek(t *testing.T, size, offset int64, algo AlgorithmType, useReadFrom, useWriteTo bool) {
// Fake data file is written to disk,
// as compression reader has to be a ReadSeeker.
testutil.Remover(t, ZipFilePath)
data := testutil.CreateDummyBuf(size)
zipFileDest := openDest(t, ZipFilePath)
// Compress.
w, err := NewWriter(zipFileDest, algo)
if err != nil {
t.Errorf("Writer init failed %v", err)
return
}
if _, err := testutil.DumbCopy(w, bytes.NewReader(data), useReadFrom, useWriteTo); err != nil {
t.Errorf("Compress failed %v", err)
return
}
defer testutil.Remover(t, ZipFilePath)
if err := w.Close(); err != nil {
t.Errorf("Compression writer close failed: %v", err)
return
}
if err := zipFileDest.Close(); err != nil {
t.Errorf("close(zipFileDest) failed: %v", err)
return
}
// Read compressed file into buffer.
dataUncomp := bytes.NewBuffer(nil)
dataFromZip := openSrc(t, ZipFilePath)
zr := NewReader(dataFromZip)
// Set specific offset before read.
_, err = zr.Seek(offset, os.SEEK_SET)
if err == io.EOF && offset < size && offset > -1 {
t.Errorf("Seek failed even with EOF: %d <= %d", offset, size)
return
}
if err != io.EOF && err != nil {
t.Errorf("Seek failed: %v", err)
return
}
// Read starting at a specific offset.
if _, err := testutil.DumbCopy(dataUncomp, zr, useReadFrom, useWriteTo); err != nil {
t.Errorf("Decompression failed: %v", err)
return
}
if err := dataFromZip.Close(); err != nil {
t.Errorf("Zip close failed: %v", err)
return
}
// Compare.
maxOffset := offset
if offset > size {
maxOffset = size
}
if offset < 0 {
maxOffset = 0
}
got, want := dataUncomp.Bytes(), data[maxOffset:]
if !bytes.Equal(got, want) {
t.Error("Uncompressed data and input data does not match.")
t.Errorf("\tGOT: %v", util.OmitBytes(got, 10))
t.Errorf("\tWANT: %v", util.OmitBytes(want, 10))
return
}
}