restic/internal/walker/walker_test.go

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package walker
import (
"context"
"encoding/json"
"fmt"
"testing"
"github.com/pkg/errors"
"github.com/restic/restic/internal/restic"
)
// TestTree is used to construct a list of trees for testing the walker.
type TestTree map[string]interface{}
// TestNode is used to test the walker.
type TestFile struct{}
func BuildTreeMap(tree TestTree) (m TreeMap, root restic.ID) {
m = TreeMap{}
id := buildTreeMap(tree, m)
return m, id
}
func buildTreeMap(tree TestTree, m TreeMap) restic.ID {
res := restic.NewTree(0)
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for name, item := range tree {
switch elem := item.(type) {
case TestFile:
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err := res.Insert(&restic.Node{
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Name: name,
Type: "file",
})
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if err != nil {
panic(err)
}
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case TestTree:
id := buildTreeMap(elem, m)
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err := res.Insert(&restic.Node{
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Name: name,
Subtree: &id,
Type: "dir",
})
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if err != nil {
panic(err)
}
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default:
panic(fmt.Sprintf("invalid type %T", elem))
}
}
buf, err := json.Marshal(res)
if err != nil {
panic(err)
}
id := restic.Hash(buf)
if _, ok := m[id]; !ok {
m[id] = res
}
return id
}
// TreeMap returns the trees from the map on LoadTree.
type TreeMap map[restic.ID]*restic.Tree
func (t TreeMap) LoadTree(ctx context.Context, id restic.ID) (*restic.Tree, error) {
tree, ok := t[id]
if !ok {
return nil, errors.New("tree not found")
}
return tree, nil
}
func (t TreeMap) Connections() uint {
return 2
}
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// checkFunc returns a function suitable for walking the tree to check
// something, and a function which will check the final result.
type checkFunc func(t testing.TB) (walker WalkFunc, final func(testing.TB))
// checkItemOrder ensures that the order of the 'path' arguments is the one passed in as 'want'.
func checkItemOrder(want []string) checkFunc {
pos := 0
return func(t testing.TB) (walker WalkFunc, final func(testing.TB)) {
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walker = func(treeID restic.ID, path string, node *restic.Node, err error) (bool, error) {
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if err != nil {
t.Errorf("error walking %v: %v", path, err)
return false, err
}
if pos >= len(want) {
t.Errorf("additional unexpected path found: %v", path)
return false, nil
}
if path != want[pos] {
t.Errorf("wrong path found, want %q, got %q", want[pos], path)
}
pos++
return false, nil
}
final = func(t testing.TB) {
if pos != len(want) {
t.Errorf("not enough items returned, want %d, got %d", len(want), pos)
}
}
return walker, final
}
}
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// checkParentTreeOrder ensures that the order of the 'parentID' arguments is the one passed in as 'want'.
func checkParentTreeOrder(want []string) checkFunc {
pos := 0
return func(t testing.TB) (walker WalkFunc, final func(testing.TB)) {
walker = func(treeID restic.ID, path string, node *restic.Node, err error) (bool, error) {
if err != nil {
t.Errorf("error walking %v: %v", path, err)
return false, err
}
if pos >= len(want) {
t.Errorf("additional unexpected parent tree ID found: %v", treeID)
return false, nil
}
if treeID.String() != want[pos] {
t.Errorf("wrong parent tree ID found, want %q, got %q", want[pos], treeID.String())
}
pos++
return false, nil
}
final = func(t testing.TB) {
if pos != len(want) {
t.Errorf("not enough items returned, want %d, got %d", len(want), pos)
}
}
return walker, final
}
}
// checkSkipFor returns ErrSkipNode if path is in skipFor, it checks that the
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// paths the walk func is called for are exactly the ones in wantPaths.
func checkSkipFor(skipFor map[string]struct{}, wantPaths []string) checkFunc {
var pos int
return func(t testing.TB) (walker WalkFunc, final func(testing.TB)) {
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walker = func(treeID restic.ID, path string, node *restic.Node, err error) (bool, error) {
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if err != nil {
t.Errorf("error walking %v: %v", path, err)
return false, err
}
if pos >= len(wantPaths) {
t.Errorf("additional unexpected path found: %v", path)
return false, nil
}
if path != wantPaths[pos] {
t.Errorf("wrong path found, want %q, got %q", wantPaths[pos], path)
}
pos++
if _, ok := skipFor[path]; ok {
return false, ErrSkipNode
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}
return false, nil
}
final = func(t testing.TB) {
if pos != len(wantPaths) {
t.Errorf("wrong number of paths returned, want %d, got %d", len(wantPaths), pos)
}
}
return walker, final
}
}
// checkIgnore returns ErrSkipNode if path is in skipFor and sets ignore according
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// to ignoreFor. It checks that the paths the walk func is called for are exactly
// the ones in wantPaths.
func checkIgnore(skipFor map[string]struct{}, ignoreFor map[string]bool, wantPaths []string) checkFunc {
var pos int
return func(t testing.TB) (walker WalkFunc, final func(testing.TB)) {
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walker = func(treeID restic.ID, path string, node *restic.Node, err error) (bool, error) {
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if err != nil {
t.Errorf("error walking %v: %v", path, err)
return false, err
}
if pos >= len(wantPaths) {
t.Errorf("additional unexpected path found: %v", path)
return ignoreFor[path], nil
}
if path != wantPaths[pos] {
t.Errorf("wrong path found, want %q, got %q", wantPaths[pos], path)
}
pos++
if _, ok := skipFor[path]; ok {
return ignoreFor[path], ErrSkipNode
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}
return ignoreFor[path], nil
}
final = func(t testing.TB) {
if pos != len(wantPaths) {
t.Errorf("wrong number of paths returned, want %d, got %d", len(wantPaths), pos)
}
}
return walker, final
}
}
func TestWalker(t *testing.T) {
var tests = []struct {
tree TestTree
checks []checkFunc
}{
{
tree: TestTree{
"foo": TestFile{},
"subdir": TestTree{
"subfile": TestFile{},
},
},
checks: []checkFunc{
checkItemOrder([]string{
"/",
"/foo",
"/subdir",
"/subdir/subfile",
}),
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checkParentTreeOrder([]string{
"2593e9dba52232c043d68c40d0f9c236b4448e37224941298ea6e223ca1e3a1b", // tree /
"2593e9dba52232c043d68c40d0f9c236b4448e37224941298ea6e223ca1e3a1b", // tree /
"2593e9dba52232c043d68c40d0f9c236b4448e37224941298ea6e223ca1e3a1b", // tree /
"a7f5be55bdd94db9df706a428e0726a4044720c9c94b9ebeb81000debe032087", // tree /subdir
}),
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checkSkipFor(
map[string]struct{}{
"/subdir": {},
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}, []string{
"/",
"/foo",
"/subdir",
},
),
checkIgnore(
map[string]struct{}{}, map[string]bool{
"/subdir": true,
}, []string{
"/",
"/foo",
"/subdir",
"/subdir/subfile",
},
),
},
},
{
tree: TestTree{
"foo": TestFile{},
"subdir1": TestTree{
"subfile1": TestFile{},
},
"subdir2": TestTree{
"subfile2": TestFile{},
"subsubdir2": TestTree{
"subsubfile3": TestFile{},
},
},
},
checks: []checkFunc{
checkItemOrder([]string{
"/",
"/foo",
"/subdir1",
"/subdir1/subfile1",
"/subdir2",
"/subdir2/subfile2",
"/subdir2/subsubdir2",
"/subdir2/subsubdir2/subsubfile3",
}),
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checkParentTreeOrder([]string{
"31c86f0bc298086b787b5d24e9e33ea566c224be2939ed66a817f7fb6fdba700", // tree /
"31c86f0bc298086b787b5d24e9e33ea566c224be2939ed66a817f7fb6fdba700", // tree /
"31c86f0bc298086b787b5d24e9e33ea566c224be2939ed66a817f7fb6fdba700", // tree /
"af838dc7a83d353f0273c33d93fcdba3220d4517576f09694a971dd23b8e94dc", // tree /subdir1
"31c86f0bc298086b787b5d24e9e33ea566c224be2939ed66a817f7fb6fdba700", // tree /
"fb749ba6ae01a3814bed9b59d74af8d7593d3074a681d4112c4983d461089e5b", // tree /subdir2
"fb749ba6ae01a3814bed9b59d74af8d7593d3074a681d4112c4983d461089e5b", // tree /subdir2
"eb8dd587a9c5e6be87b69d2c5264a19622f75bf6704927aaebaee78d0992531d", // tree /subdir2/subsubdir2
}),
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checkSkipFor(
map[string]struct{}{
"/subdir1": {},
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}, []string{
"/",
"/foo",
"/subdir1",
"/subdir2",
"/subdir2/subfile2",
"/subdir2/subsubdir2",
"/subdir2/subsubdir2/subsubfile3",
},
),
checkSkipFor(
map[string]struct{}{
"/subdir1": {},
"/subdir2/subsubdir2": {},
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}, []string{
"/",
"/foo",
"/subdir1",
"/subdir2",
"/subdir2/subfile2",
"/subdir2/subsubdir2",
},
),
checkSkipFor(
map[string]struct{}{
"/foo": {},
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}, []string{
"/",
"/foo",
},
),
},
},
{
tree: TestTree{
"foo": TestFile{},
"subdir1": TestTree{
"subfile1": TestFile{},
"subfile2": TestFile{},
"subfile3": TestFile{},
},
"subdir2": TestTree{
"subfile1": TestFile{},
"subfile2": TestFile{},
"subfile3": TestFile{},
},
"subdir3": TestTree{
"subfile1": TestFile{},
"subfile2": TestFile{},
"subfile3": TestFile{},
},
"zzz other": TestFile{},
},
checks: []checkFunc{
checkItemOrder([]string{
"/",
"/foo",
"/subdir1",
"/subdir1/subfile1",
"/subdir1/subfile2",
"/subdir1/subfile3",
"/subdir2",
"/subdir2/subfile1",
"/subdir2/subfile2",
"/subdir2/subfile3",
"/subdir3",
"/subdir3/subfile1",
"/subdir3/subfile2",
"/subdir3/subfile3",
"/zzz other",
}),
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checkParentTreeOrder([]string{
"b37368f62fdd6f8f3d19f9ef23c6534988e26db4e5dddc21d206b16b6a17a58f", // tree /
"b37368f62fdd6f8f3d19f9ef23c6534988e26db4e5dddc21d206b16b6a17a58f", // tree /
"b37368f62fdd6f8f3d19f9ef23c6534988e26db4e5dddc21d206b16b6a17a58f", // tree /
"787b9260d4f0f8298f5cf58945681961982eb6aa1c526845206c5b353aeb4351", // tree /subdir1
"787b9260d4f0f8298f5cf58945681961982eb6aa1c526845206c5b353aeb4351", // tree /subdir1
"787b9260d4f0f8298f5cf58945681961982eb6aa1c526845206c5b353aeb4351", // tree /subdir1
"b37368f62fdd6f8f3d19f9ef23c6534988e26db4e5dddc21d206b16b6a17a58f", // tree /
"787b9260d4f0f8298f5cf58945681961982eb6aa1c526845206c5b353aeb4351", // tree /subdir2
"787b9260d4f0f8298f5cf58945681961982eb6aa1c526845206c5b353aeb4351", // tree /subdir2
"787b9260d4f0f8298f5cf58945681961982eb6aa1c526845206c5b353aeb4351", // tree /subdir2
"b37368f62fdd6f8f3d19f9ef23c6534988e26db4e5dddc21d206b16b6a17a58f", // tree /
"787b9260d4f0f8298f5cf58945681961982eb6aa1c526845206c5b353aeb4351", // tree /subdir3
"787b9260d4f0f8298f5cf58945681961982eb6aa1c526845206c5b353aeb4351", // tree /subdir3
"787b9260d4f0f8298f5cf58945681961982eb6aa1c526845206c5b353aeb4351", // tree /subdir3
"b37368f62fdd6f8f3d19f9ef23c6534988e26db4e5dddc21d206b16b6a17a58f", // tree /
}),
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checkIgnore(
map[string]struct{}{
"/subdir1": {},
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}, map[string]bool{
"/subdir1": true,
}, []string{
"/",
"/foo",
"/subdir1",
"/zzz other",
},
),
checkIgnore(
map[string]struct{}{}, map[string]bool{
"/subdir1": true,
}, []string{
"/",
"/foo",
"/subdir1",
"/subdir1/subfile1",
"/subdir1/subfile2",
"/subdir1/subfile3",
"/zzz other",
},
),
checkIgnore(
map[string]struct{}{
"/subdir2": {},
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}, map[string]bool{
"/subdir2": true,
}, []string{
"/",
"/foo",
"/subdir1",
"/subdir1/subfile1",
"/subdir1/subfile2",
"/subdir1/subfile3",
"/subdir2",
"/zzz other",
},
),
checkIgnore(
map[string]struct{}{}, map[string]bool{
"/subdir1/subfile1": true,
"/subdir1/subfile2": true,
"/subdir1/subfile3": true,
}, []string{
"/",
"/foo",
"/subdir1",
"/subdir1/subfile1",
"/subdir1/subfile2",
"/subdir1/subfile3",
"/zzz other",
},
),
checkIgnore(
map[string]struct{}{}, map[string]bool{
"/subdir2/subfile1": true,
"/subdir2/subfile2": true,
"/subdir2/subfile3": true,
}, []string{
"/",
"/foo",
"/subdir1",
"/subdir1/subfile1",
"/subdir1/subfile2",
"/subdir1/subfile3",
"/subdir2",
"/subdir2/subfile1",
"/subdir2/subfile2",
"/subdir2/subfile3",
"/zzz other",
},
),
},
},
{
tree: TestTree{
"subdir1": TestTree{},
"subdir2": TestTree{},
"subdir3": TestTree{
"file": TestFile{},
},
"subdir4": TestTree{
"file": TestFile{},
},
"subdir5": TestTree{},
"subdir6": TestTree{},
},
checks: []checkFunc{
checkItemOrder([]string{
"/",
"/subdir1",
"/subdir2",
"/subdir3",
"/subdir3/file",
"/subdir4",
"/subdir4/file",
"/subdir5",
"/subdir6",
}),
},
},
{
tree: TestTree{
"subdir1": TestTree{},
"subdir2": TestTree{},
"subdir3": TestTree{
"file": TestFile{},
},
"subdir4": TestTree{},
"subdir5": TestTree{
"file": TestFile{},
},
"subdir6": TestTree{},
},
checks: []checkFunc{
checkIgnore(
map[string]struct{}{}, map[string]bool{
"/subdir2": true,
}, []string{
"/",
"/subdir1",
"/subdir2",
"/subdir3",
"/subdir3/file",
"/subdir5",
"/subdir5/file",
},
),
},
},
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}
for _, test := range tests {
t.Run("", func(t *testing.T) {
repo, root := BuildTreeMap(test.tree)
for _, check := range test.checks {
t.Run("", func(t *testing.T) {
ctx, cancel := context.WithCancel(context.TODO())
defer cancel()
fn, last := check(t)
err := Walk(ctx, repo, root, restic.NewIDSet(), fn)
if err != nil {
t.Error(err)
}
last(t)
})
}
})
}
}