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120 lines
3.3 KiB
Go
120 lines
3.3 KiB
Go
package dryrun_test
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import (
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"context"
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"fmt"
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"io"
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"sort"
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"strings"
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"testing"
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"github.com/restic/restic/internal/backend"
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"github.com/restic/restic/internal/backend/dryrun"
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"github.com/restic/restic/internal/backend/mem"
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)
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// make sure that Backend implements backend.Backend
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var _ backend.Backend = &dryrun.Backend{}
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func newBackends() (*dryrun.Backend, backend.Backend) {
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m := mem.New()
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return dryrun.New(m), m
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}
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func TestDry(t *testing.T) {
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ctx := context.TODO()
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d, m := newBackends()
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// Since the dry backend is a mostly write-only overlay, the standard backend test suite
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// won't pass. Instead, perform a series of operations over the backend, testing the state
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// at each step.
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steps := []struct {
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be backend.Backend
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op string
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fname string
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content string
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wantErr string
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}{
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{d, "delete", "", "", ""},
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{d, "stat", "a", "", "not found"},
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{d, "list", "", "", ""},
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{m, "save", "a", "baz", ""}, // save a directly to the mem backend
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{d, "save", "b", "foob", ""}, // b is not saved
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{d, "save", "b", "xxx", ""}, // no error as b is not saved
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{d, "stat", "a", "a 3", ""},
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{d, "load", "a", "baz", ""},
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{d, "load", "b", "", "not found"},
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{d, "list", "", "a", ""},
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{d, "remove", "c", "", ""},
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{d, "stat", "b", "", "not found"},
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{d, "list", "", "a", ""},
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{d, "remove", "a", "", ""}, // a is in fact not removed
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{d, "list", "", "a", ""},
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{m, "remove", "a", "", ""}, // remove a from the mem backend
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{d, "list", "", "", ""},
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{d, "close", "", "", ""},
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{d, "close", "", "", ""},
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}
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for i, step := range steps {
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var err error
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handle := backend.Handle{Type: backend.PackFile, Name: step.fname}
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switch step.op {
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case "save":
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err = step.be.Save(ctx, handle, backend.NewByteReader([]byte(step.content), step.be.Hasher()))
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case "list":
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fileList := []string{}
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err = step.be.List(ctx, backend.PackFile, func(fi backend.FileInfo) error {
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fileList = append(fileList, fi.Name)
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return nil
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})
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sort.Strings(fileList)
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files := strings.Join(fileList, " ")
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if files != step.content {
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t.Errorf("%d. List = %q, want %q", i, files, step.content)
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}
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case "delete":
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err = step.be.Delete(ctx)
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case "remove":
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err = step.be.Remove(ctx, handle)
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case "stat":
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var fi backend.FileInfo
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fi, err = step.be.Stat(ctx, handle)
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if err == nil {
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fis := fmt.Sprintf("%s %d", fi.Name, fi.Size)
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if fis != step.content {
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t.Errorf("%d. Stat = %q, want %q", i, fis, step.content)
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}
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}
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case "load":
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data := ""
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err = step.be.Load(ctx, handle, 0, 0, func(rd io.Reader) error {
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buf, err := io.ReadAll(rd)
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data = string(buf)
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return err
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})
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if data != step.content {
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t.Errorf("%d. Load = %q, want %q", i, data, step.content)
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}
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case "close":
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err = step.be.Close()
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default:
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t.Fatalf("%d. unknown step operation %q", i, step.op)
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}
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if step.wantErr != "" {
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if err == nil {
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t.Errorf("%d. %s error = nil, want %q", i, step.op, step.wantErr)
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} else if !strings.Contains(err.Error(), step.wantErr) {
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t.Errorf("%d. %s error = %q, doesn't contain %q", i, step.op, err, step.wantErr)
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} else if step.wantErr == "not found" && !step.be.IsNotExist(err) {
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t.Errorf("%d. IsNotExist(%s error) = false, want true", i, step.op)
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}
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} else if err != nil {
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t.Errorf("%d. %s error = %q, want nil", i, step.op, err)
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}
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}
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}
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