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Diffstat (limited to 'pkg/safemem/io_test.go')
-rw-r--r--pkg/safemem/io_test.go199
1 files changed, 0 insertions, 199 deletions
diff --git a/pkg/safemem/io_test.go b/pkg/safemem/io_test.go
deleted file mode 100644
index 629741bee..000000000
--- a/pkg/safemem/io_test.go
+++ /dev/null
@@ -1,199 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// 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 safemem
-
-import (
- "bytes"
- "io"
- "testing"
-)
-
-func makeBlocks(slices ...[]byte) []Block {
- blocks := make([]Block, 0, len(slices))
- for _, s := range slices {
- blocks = append(blocks, BlockFromSafeSlice(s))
- }
- return blocks
-}
-
-func TestFromIOReaderFullRead(t *testing.T) {
- r := FromIOReader{bytes.NewBufferString("foobar")}
- dsts := makeBlocks(make([]byte, 3), make([]byte, 3))
- n, err := r.ReadToBlocks(BlockSeqFromSlice(dsts))
- if wantN := uint64(6); n != wantN || err != nil {
- t.Errorf("ReadToBlocks: got (%v, %v), wanted (%v, nil)", n, err, wantN)
- }
- for i, want := range [][]byte{[]byte("foo"), []byte("bar")} {
- if got := dsts[i].ToSlice(); !bytes.Equal(got, want) {
- t.Errorf("dsts[%d]: got %q, wanted %q", i, got, want)
- }
- }
-}
-
-type eofHidingReader struct {
- Reader io.Reader
-}
-
-func (r eofHidingReader) Read(dst []byte) (int, error) {
- n, err := r.Reader.Read(dst)
- if err == io.EOF {
- return n, nil
- }
- return n, err
-}
-
-func TestFromIOReaderPartialRead(t *testing.T) {
- r := FromIOReader{eofHidingReader{bytes.NewBufferString("foob")}}
- dsts := makeBlocks(make([]byte, 3), make([]byte, 3))
- n, err := r.ReadToBlocks(BlockSeqFromSlice(dsts))
- // FromIOReader should stop after the eofHidingReader returns (1, nil)
- // for a 3-byte read.
- if wantN := uint64(4); n != wantN || err != nil {
- t.Errorf("ReadToBlocks: got (%v, %v), wanted (%v, nil)", n, err, wantN)
- }
- for i, want := range [][]byte{[]byte("foo"), []byte("b\x00\x00")} {
- if got := dsts[i].ToSlice(); !bytes.Equal(got, want) {
- t.Errorf("dsts[%d]: got %q, wanted %q", i, got, want)
- }
- }
-}
-
-type singleByteReader struct {
- Reader io.Reader
-}
-
-func (r singleByteReader) Read(dst []byte) (int, error) {
- if len(dst) == 0 {
- return r.Reader.Read(dst)
- }
- return r.Reader.Read(dst[:1])
-}
-
-func TestSingleByteReader(t *testing.T) {
- r := FromIOReader{singleByteReader{bytes.NewBufferString("foobar")}}
- dsts := makeBlocks(make([]byte, 3), make([]byte, 3))
- n, err := r.ReadToBlocks(BlockSeqFromSlice(dsts))
- // FromIOReader should stop after the singleByteReader returns (1, nil)
- // for a 3-byte read.
- if wantN := uint64(1); n != wantN || err != nil {
- t.Errorf("ReadToBlocks: got (%v, %v), wanted (%v, nil)", n, err, wantN)
- }
- for i, want := range [][]byte{[]byte("f\x00\x00"), []byte("\x00\x00\x00")} {
- if got := dsts[i].ToSlice(); !bytes.Equal(got, want) {
- t.Errorf("dsts[%d]: got %q, wanted %q", i, got, want)
- }
- }
-}
-
-func TestReadFullToBlocks(t *testing.T) {
- r := FromIOReader{singleByteReader{bytes.NewBufferString("foobar")}}
- dsts := makeBlocks(make([]byte, 3), make([]byte, 3))
- n, err := ReadFullToBlocks(r, BlockSeqFromSlice(dsts))
- // ReadFullToBlocks should call into FromIOReader => singleByteReader
- // repeatedly until dsts is exhausted.
- if wantN := uint64(6); n != wantN || err != nil {
- t.Errorf("ReadFullToBlocks: got (%v, %v), wanted (%v, nil)", n, err, wantN)
- }
- for i, want := range [][]byte{[]byte("foo"), []byte("bar")} {
- if got := dsts[i].ToSlice(); !bytes.Equal(got, want) {
- t.Errorf("dsts[%d]: got %q, wanted %q", i, got, want)
- }
- }
-}
-
-func TestFromIOWriterFullWrite(t *testing.T) {
- srcs := makeBlocks([]byte("foo"), []byte("bar"))
- var dst bytes.Buffer
- w := FromIOWriter{&dst}
- n, err := w.WriteFromBlocks(BlockSeqFromSlice(srcs))
- if wantN := uint64(6); n != wantN || err != nil {
- t.Errorf("WriteFromBlocks: got (%v, %v), wanted (%v, nil)", n, err, wantN)
- }
- if got, want := dst.Bytes(), []byte("foobar"); !bytes.Equal(got, want) {
- t.Errorf("dst: got %q, wanted %q", got, want)
- }
-}
-
-type limitedWriter struct {
- Writer io.Writer
- Done int
- Limit int
-}
-
-func (w *limitedWriter) Write(src []byte) (int, error) {
- count := len(src)
- if count > (w.Limit - w.Done) {
- count = w.Limit - w.Done
- }
- n, err := w.Writer.Write(src[:count])
- w.Done += n
- return n, err
-}
-
-func TestFromIOWriterPartialWrite(t *testing.T) {
- srcs := makeBlocks([]byte("foo"), []byte("bar"))
- var dst bytes.Buffer
- w := FromIOWriter{&limitedWriter{&dst, 0, 4}}
- n, err := w.WriteFromBlocks(BlockSeqFromSlice(srcs))
- // FromIOWriter should stop after the limitedWriter returns (1, nil) for a
- // 3-byte write.
- if wantN := uint64(4); n != wantN || err != nil {
- t.Errorf("WriteFromBlocks: got (%v, %v), wanted (%v, nil)", n, err, wantN)
- }
- if got, want := dst.Bytes(), []byte("foob"); !bytes.Equal(got, want) {
- t.Errorf("dst: got %q, wanted %q", got, want)
- }
-}
-
-type singleByteWriter struct {
- Writer io.Writer
-}
-
-func (w singleByteWriter) Write(src []byte) (int, error) {
- if len(src) == 0 {
- return w.Writer.Write(src)
- }
- return w.Writer.Write(src[:1])
-}
-
-func TestSingleByteWriter(t *testing.T) {
- srcs := makeBlocks([]byte("foo"), []byte("bar"))
- var dst bytes.Buffer
- w := FromIOWriter{singleByteWriter{&dst}}
- n, err := w.WriteFromBlocks(BlockSeqFromSlice(srcs))
- // FromIOWriter should stop after the singleByteWriter returns (1, nil)
- // for a 3-byte write.
- if wantN := uint64(1); n != wantN || err != nil {
- t.Errorf("WriteFromBlocks: got (%v, %v), wanted (%v, nil)", n, err, wantN)
- }
- if got, want := dst.Bytes(), []byte("f"); !bytes.Equal(got, want) {
- t.Errorf("dst: got %q, wanted %q", got, want)
- }
-}
-
-func TestWriteFullToBlocks(t *testing.T) {
- srcs := makeBlocks([]byte("foo"), []byte("bar"))
- var dst bytes.Buffer
- w := FromIOWriter{singleByteWriter{&dst}}
- n, err := WriteFullFromBlocks(w, BlockSeqFromSlice(srcs))
- // WriteFullToBlocks should call into FromIOWriter => singleByteWriter
- // repeatedly until srcs is exhausted.
- if wantN := uint64(6); n != wantN || err != nil {
- t.Errorf("WriteFullFromBlocks: got (%v, %v), wanted (%v, nil)", n, err, wantN)
- }
- if got, want := dst.Bytes(), []byte("foobar"); !bytes.Equal(got, want) {
- t.Errorf("dst: got %q, wanted %q", got, want)
- }
-}