mirror of
https://github.com/restic/restic.git
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158 lines
3.2 KiB
Go
158 lines
3.2 KiB
Go
// +build !openbsd
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package fuse
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import (
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"bytes"
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"errors"
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"math/rand"
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"testing"
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"time"
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"bazil.org/fuse"
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"github.com/restic/restic"
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"github.com/restic/restic/backend"
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"github.com/restic/restic/pack"
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. "github.com/restic/restic/test"
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)
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type MockRepo struct {
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blobs map[backend.ID][]byte
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}
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func NewMockRepo(content map[backend.ID][]byte) *MockRepo {
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return &MockRepo{blobs: content}
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}
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func (m *MockRepo) LookupBlobSize(id backend.ID) (uint, error) {
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buf, ok := m.blobs[id]
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if !ok {
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return 0, errors.New("blob not found")
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}
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return uint(len(buf)), nil
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}
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func (m *MockRepo) LoadBlob(t pack.BlobType, id backend.ID, buf []byte) ([]byte, error) {
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size, err := m.LookupBlobSize(id)
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if err != nil {
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return nil, err
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}
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if uint(cap(buf)) < size {
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return nil, errors.New("buffer too small")
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}
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buf = buf[:size]
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copy(buf, m.blobs[id])
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return buf, nil
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}
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type MockContext struct{}
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func (m MockContext) Deadline() (time.Time, bool) { return time.Now(), false }
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func (m MockContext) Done() <-chan struct{} { return nil }
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func (m MockContext) Err() error { return nil }
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func (m MockContext) Value(key interface{}) interface{} { return nil }
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var testContent = genTestContent()
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var testContentLengths = []uint{
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4646 * 1024,
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655 * 1024,
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378 * 1024,
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8108 * 1024,
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558 * 1024,
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}
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var testMaxFileSize uint
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func genTestContent() map[backend.ID][]byte {
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m := make(map[backend.ID][]byte)
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for _, length := range testContentLengths {
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buf := Random(int(length), int(length))
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id := backend.Hash(buf)
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m[id] = buf
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testMaxFileSize += length
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}
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return m
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}
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const maxBufSize = 20 * 1024 * 1024
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func testRead(t *testing.T, f *file, offset, length int, data []byte) []byte {
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ctx := MockContext{}
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req := &fuse.ReadRequest{
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Offset: int64(offset),
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Size: length,
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}
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resp := &fuse.ReadResponse{
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Data: make([]byte, length),
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}
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OK(t, f.Read(ctx, req, resp))
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return resp.Data
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}
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var offsetReadsTests = []struct {
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offset, length int
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}{
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{0, 5 * 1024 * 1024},
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{4000 * 1024, 1000 * 1024},
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}
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func TestFuseFile(t *testing.T) {
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repo := NewMockRepo(testContent)
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ctx := MockContext{}
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memfile := make([]byte, 0, maxBufSize)
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var ids backend.IDs
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for id, buf := range repo.blobs {
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ids = append(ids, id)
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memfile = append(memfile, buf...)
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}
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node := &restic.Node{
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Name: "foo",
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Inode: 23,
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Mode: 0742,
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Size: 42,
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Content: ids,
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}
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f, err := newFile(repo, node, false)
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OK(t, err)
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attr := fuse.Attr{}
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OK(t, f.Attr(ctx, &attr))
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Equals(t, node.Inode, attr.Inode)
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Equals(t, node.Mode, attr.Mode)
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Equals(t, node.Size, attr.Size)
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for i, test := range offsetReadsTests {
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b := memfile[test.offset : test.offset+test.length]
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res := testRead(t, f, test.offset, test.length, b)
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if !bytes.Equal(b, res) {
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t.Errorf("test %d failed, wrong data returned", i)
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}
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}
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for i := 0; i < 200; i++ {
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length := rand.Intn(int(testMaxFileSize) / 2)
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offset := rand.Intn(int(testMaxFileSize))
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if length+offset > int(testMaxFileSize) {
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diff := length + offset - int(testMaxFileSize)
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length -= diff
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}
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b := memfile[offset : offset+length]
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res := testRead(t, f, offset, length, b)
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if !bytes.Equal(b, res) {
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t.Errorf("test %d failed (offset %d, length %d), wrong data returned", i, offset, length)
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}
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}
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}
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