tests(readlink): enable wasi integration tests

.github/workflows/wasi.yml

@@ -65,7 +65,7 @@ jobs:
         # caret diagnostics; the host test crate does have them, hence the
         # not(wasi_runner) in the cfg guarding every `mod diagnostics`.
         # TODO: add integration tests for these tools as WASI support is extended:
-        #   csplit fmt ls mv readlink
+        #   csplit fmt ls mv
         #   rm seq sort split tsort
         # nproc is not part of the default feature set, so it needs to be
         # requested explicitly for the host test crate to compile its tests.
@@ -81,7 +81,7 @@ jobs:
           test_md5sum:: test_mkdir:: test_mktemp:: test_nl:: test_nproc:: test_numfmt:: test_od:: \
           test_mv::test_mv_dir_into_file_where_both_are_files \
           test_paste:: test_pathchk:: test_pr:: test_printenv:: test_printf:: test_ptx:: \
-          test_pwd:: test_realpath:: test_rmdir:: test_sha1sum:: test_sha224sum:: test_sha256sum:: \
+          test_pwd:: test_readlink:: test_realpath:: test_rmdir:: test_sha1sum:: test_sha224sum:: test_sha256sum:: \
           test_sha384sum:: test_sha512sum:: test_shred:: test_shuf:: test_sleep:: \
           test_sum:: test_tail:: test_tee:: \
           test_test:: test_touch:: test_tr:: test_true:: test_truncate:: test_uname:: \

tests/by-util/test_readlink.rs

@@ -33,7 +33,7 @@ fn test_resolve() {
     let (at, mut ucmd) = at_and_ucmd!();
 
     at.touch("foo");
-    at.symlink_file("foo", "bar");
+    at.relative_symlink_file("foo", "bar");
 
     ucmd.arg("bar").succeeds().stdout_contains("foo\n");
 }
@@ -81,6 +81,10 @@ fn test_canonicalize_existing_keeps_going_after_a_missing_operand() {
 }
 
 #[test]
+#[cfg_attr(
+    wasi_runner,
+    ignore = "WASI sandbox: canonicalized path resolves to the guest's virtual root, not the host's absolute path"
+)]
 fn test_canonicalize() {
     let (at, mut ucmd) = at_and_ucmd!();
     let actual = ucmd.arg("-f").arg(".").succeeds().stdout_move_str();
@@ -91,6 +95,10 @@ fn test_canonicalize() {
 }
 
 #[test]
+#[cfg_attr(
+    wasi_runner,
+    ignore = "WASI sandbox: canonicalized path resolves to the guest's virtual root, not the host's absolute path"
+)]
 fn test_canonicalize_existing() {
     let (at, mut ucmd) = at_and_ucmd!();
     let actual = ucmd.arg("-e").arg(".").succeeds().stdout_move_str();
@@ -101,6 +109,10 @@ fn test_canonicalize_existing() {
 }
 
 #[test]
+#[cfg_attr(
+    wasi_runner,
+    ignore = "WASI sandbox: canonicalized path resolves to the guest's virtual root, not the host's absolute path"
+)]
 fn test_canonicalize_missing() {
     let (at, mut ucmd) = at_and_ucmd!();
     let actual = ucmd.arg("-m").arg(GIBBERISH).succeeds().stdout_move_str();
@@ -112,6 +124,10 @@ fn test_canonicalize_missing() {
 
 #[test]
 #[cfg(unix)]
+#[cfg_attr(
+    wasi_runner,
+    ignore = "WASI sandbox: canonicalized path resolves to the guest's virtual root, not the host's absolute path"
+)]
 fn test_canonicalize_symlink_before_parentdir() {
     // GNU readlink follows the symlink first and only then evaluates `..`.
     // Logical resolution would collapse `link/..` up front and return the current directory instead.
@@ -126,6 +142,10 @@ fn test_canonicalize_symlink_before_parentdir() {
 }
 
 #[test]
+#[cfg_attr(
+    wasi_runner,
+    ignore = "WASI sandbox: canonicalized path resolves to the guest's virtual root, not the host's absolute path"
+)]
 fn test_long_redirection_to_current_dir() {
     let (at, mut ucmd) = at_and_ucmd!();
     // Create a 256-character path to current directory
@@ -488,6 +508,7 @@ fn test_delimiters() {
 
 #[test]
 #[cfg(target_os = "linux")]
+#[cfg_attr(wasi_runner, ignore = "WASI: argv/filenames must be valid UTF-8")]
 fn test_readlink_non_utf8_paths() {
     use std::ffi::OsStr;
     use std::os::unix::ffi::OsStrExt;