124 lines
2.4 KiB
Go
124 lines
2.4 KiB
Go
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package fs_test
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import (
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. "io/fs"
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"os"
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pathpkg "path"
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"testing"
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"testing/fstest"
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)
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type Node struct {
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name string
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entries []*Node // nil if the entry is a file
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mark int
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}
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var tree = &Node{
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"testdata",
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[]*Node{
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{"a", nil, 0},
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{"b", []*Node{}, 0},
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{"c", nil, 0},
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{
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"d",
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[]*Node{
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{"x", nil, 0},
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{"y", []*Node{}, 0},
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{
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"z",
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[]*Node{
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{"u", nil, 0},
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{"v", nil, 0},
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},
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0,
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},
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},
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0,
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},
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},
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0,
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}
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func walkTree(n *Node, path string, f func(path string, n *Node)) {
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f(path, n)
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for _, e := range n.entries {
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walkTree(e, pathpkg.Join(path, e.name), f)
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}
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}
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func makeTree(t *testing.T) FS {
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fsys := fstest.MapFS{}
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walkTree(tree, tree.name, func(path string, n *Node) {
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if n.entries == nil {
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fsys[path] = &fstest.MapFile{}
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} else {
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fsys[path] = &fstest.MapFile{Mode: ModeDir}
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}
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})
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return fsys
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}
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func markTree(n *Node) { walkTree(n, "", func(path string, n *Node) { n.mark++ }) }
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func checkMarks(t *testing.T, report bool) {
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walkTree(tree, tree.name, func(path string, n *Node) {
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if n.mark != 1 && report {
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t.Errorf("node %s mark = %d; expected 1", path, n.mark)
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}
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n.mark = 0
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})
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}
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// Assumes that each node name is unique. Good enough for a test.
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// If clear is true, any incoming error is cleared before return. The errors
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// are always accumulated, though.
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func mark(entry DirEntry, err error, errors *[]error, clear bool) error {
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name := entry.Name()
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walkTree(tree, tree.name, func(path string, n *Node) {
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if n.name == name {
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n.mark++
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}
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})
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if err != nil {
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*errors = append(*errors, err)
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if clear {
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return nil
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}
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return err
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}
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return nil
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}
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func TestWalkDir(t *testing.T) {
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tmpDir := t.TempDir()
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origDir, err := os.Getwd()
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if err != nil {
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t.Fatal("finding working dir:", err)
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}
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if err = os.Chdir(tmpDir); err != nil {
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t.Fatal("entering temp dir:", err)
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}
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defer os.Chdir(origDir)
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fsys := makeTree(t)
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errors := make([]error, 0, 10)
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clear := true
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markFn := func(path string, entry DirEntry, err error) error {
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return mark(entry, err, &errors, clear)
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}
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// Expect no errors.
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err = WalkDir(fsys, ".", markFn)
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if err != nil {
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t.Fatalf("no error expected, found: %s", err)
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}
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if len(errors) != 0 {
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t.Fatalf("unexpected errors: %s", errors)
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}
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checkMarks(t, true)
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}
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