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path/filepath: add test cases for walking a symlink-to-symlink-to-dir

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The "double link with slash" test is skipped on darwin due to an
apparent kernel / libc bug. If the bug is present on other platforms
too, I'd like to know about it.

For #59586.

Change-Id: I4bdd6a80a3ed7b0960ea6da30f91a655f317d512
Reviewed-on: https://go-review.googlesource.com/c/go/+/484395
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Bryan C. Mills 2023-04-13 14:48:35 +00:00 committed by Gopher Robot
parent b5a7f2eef7
commit 74c296b69f
1 changed files with 42 additions and 4 deletions
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46
src/path/filepath/path_test.go
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@ -13,6 +13,7 @@ import (
"path/filepath"
"reflect"
"runtime"
"slices"
"sort"
"strings"
"syscall"
@ -842,6 +843,16 @@ func TestWalkSymlinkRoot(t *testing.T) {
t.Fatal(err)
}
abslink := filepath.Join(td, "abslink")
if err := os.Symlink(dir, abslink); err != nil {
t.Fatal(err)
}
linklink := filepath.Join(td, "linklink")
if err := os.Symlink("link", linklink); err != nil {
t.Fatal(err)
}
// Per https://pubs.opengroup.org/onlinepubs/9699919799.2013edition/basedefs/V1_chap04.html#tag_04_12:
// “A pathname that contains at least one non- <slash> character and that ends
// with one or more trailing <slash> characters shall not be resolved
@ -854,9 +865,10 @@ func TestWalkSymlinkRoot(t *testing.T) {
// but if it does end in a slash, Walk should walk the directory to which the symlink
// refers (since it must be fully resolved before walking).
for _, tt := range []struct {
desc string
root string
want []string
desc string
root string
want []string
buggyGOOS []string
}{
{
desc: "no slash",
@ -868,6 +880,27 @@ func TestWalkSymlinkRoot(t *testing.T) {
root: link + string(filepath.Separator),
want: []string{link, filepath.Join(link, "foo")},
},
{
desc: "abs no slash",
root: abslink,
want: []string{abslink},
},
{
desc: "abs with slash",
root: abslink + string(filepath.Separator),
want: []string{abslink, filepath.Join(abslink, "foo")},
},
{
desc: "double link no slash",
root: linklink,
want: []string{linklink},
},
{
desc: "double link with slash",
root: linklink + string(filepath.Separator),
want: []string{linklink, filepath.Join(linklink, "foo")},
buggyGOOS: []string{"darwin"}, // https://go.dev/issue/59586
},
} {
tt := tt
t.Run(tt.desc, func(t *testing.T) {
@ -885,7 +918,12 @@ func TestWalkSymlinkRoot(t *testing.T) {
}
if !reflect.DeepEqual(walked, tt.want) {
t.Errorf("Walk(%#q) visited %#q; want %#q", tt.root, walked, tt.want)
t.Logf("Walk(%#q) visited %#q; want %#q", tt.root, walked, tt.want)
if slices.Contains(tt.buggyGOOS, runtime.GOOS) {
t.Logf("(ignoring known bug on %v)", runtime.GOOS)
} else {
t.Fail()
}
}
})
}