mirror of https://github.com/octoleo/restic.git
137 lines
3.3 KiB
Go
137 lines
3.3 KiB
Go
package mock
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import (
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"context"
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"io"
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"github.com/restic/restic/internal/errors"
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"github.com/restic/restic/internal/restic"
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)
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// Backend implements a mock backend.
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type Backend struct {
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CloseFn func() error
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IsNotExistFn func(err error) bool
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SaveFn func(ctx context.Context, h restic.Handle, rd restic.RewindReader) error
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OpenReaderFn func(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error)
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StatFn func(ctx context.Context, h restic.Handle) (restic.FileInfo, error)
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ListFn func(ctx context.Context, t restic.FileType, fn func(restic.FileInfo) error) error
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RemoveFn func(ctx context.Context, h restic.Handle) error
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TestFn func(ctx context.Context, h restic.Handle) (bool, error)
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DeleteFn func(ctx context.Context) error
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LocationFn func() string
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}
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// NewBackend returns new mock Backend instance
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func NewBackend() *Backend {
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be := &Backend{}
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return be
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}
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// Close the backend.
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func (m *Backend) Close() error {
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if m.CloseFn == nil {
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return nil
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}
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return m.CloseFn()
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}
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// Location returns a location string.
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func (m *Backend) Location() string {
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if m.LocationFn == nil {
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return ""
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}
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return m.LocationFn()
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}
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// IsNotExist returns true if the error is caused by a missing file.
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func (m *Backend) IsNotExist(err error) bool {
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if m.IsNotExistFn == nil {
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return false
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}
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return m.IsNotExistFn(err)
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}
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// Save data in the backend.
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func (m *Backend) Save(ctx context.Context, h restic.Handle, rd restic.RewindReader) error {
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if m.SaveFn == nil {
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return errors.New("not implemented")
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}
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return m.SaveFn(ctx, h, rd)
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}
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// Load runs fn with a reader that yields the contents of the file at h at the
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// given offset.
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func (m *Backend) Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
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rd, err := m.openReader(ctx, h, length, offset)
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if err != nil {
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return err
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}
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err = fn(rd)
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if err != nil {
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_ = rd.Close() // ignore secondary errors closing the reader
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return err
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}
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return rd.Close()
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}
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func (m *Backend) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
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if m.OpenReaderFn == nil {
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return nil, errors.New("not implemented")
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}
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return m.OpenReaderFn(ctx, h, length, offset)
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}
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// Stat an object in the backend.
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func (m *Backend) Stat(ctx context.Context, h restic.Handle) (restic.FileInfo, error) {
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if m.StatFn == nil {
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return restic.FileInfo{}, errors.New("not implemented")
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}
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return m.StatFn(ctx, h)
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}
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// List items of type t.
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func (m *Backend) List(ctx context.Context, t restic.FileType, fn func(restic.FileInfo) error) error {
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if m.ListFn == nil {
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return nil
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}
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return m.ListFn(ctx, t, fn)
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}
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// Remove data from the backend.
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func (m *Backend) Remove(ctx context.Context, h restic.Handle) error {
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if m.RemoveFn == nil {
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return errors.New("not implemented")
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}
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return m.RemoveFn(ctx, h)
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}
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// Test for the existence of a specific item.
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func (m *Backend) Test(ctx context.Context, h restic.Handle) (bool, error) {
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if m.TestFn == nil {
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return false, errors.New("not implemented")
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}
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return m.TestFn(ctx, h)
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}
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// Delete all data.
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func (m *Backend) Delete(ctx context.Context) error {
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if m.DeleteFn == nil {
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return errors.New("not implemented")
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}
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return m.DeleteFn(ctx)
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}
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// Make sure that Backend implements the backend interface.
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var _ restic.Backend = &Backend{}
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