tests(realpath): enable wasi integration tests

.github/workflows/wasi.yml

@@ -62,7 +62,7 @@ jobs:
         # not(wasi_runner) in the cfg guarding every `mod diagnostics`.
         # TODO: add integration tests for these tools as WASI support is extended:
         #   cksum csplit dircolors fmt ls mv readlink
-        #   realpath rm seq sort split tsort
+        #   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.
         UUTESTS_BINARY_PATH="$(pwd)/target/${{ matrix.job.target }}/debug/coreutils.wasm" \
@@ -76,7 +76,7 @@ jobs:
           test_ls::test_ls_al_no_capabilities_insufficient_on_wasi \
           test_md5sum:: test_mkdir:: test_mktemp:: test_nl:: test_nproc:: test_numfmt:: test_od:: \
           test_paste:: test_pathchk:: test_pr:: test_printenv:: test_printf:: test_ptx:: \
-          test_pwd:: test_rmdir:: test_sha1sum:: test_sha224sum:: test_sha256sum:: \
+          test_pwd:: 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_realpath.rs

@@ -17,13 +17,15 @@ use std::path::{MAIN_SEPARATOR, Path};
 static GIBBERISH: &str = "supercalifragilisticexpialidocious";
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: host paths not visible")]
 fn test_realpath_current_directory() {
     let (at, mut ucmd) = at_and_ucmd!();
     let expect = at.root_dir_resolved() + "\n";
     ucmd.arg(".").succeeds().stdout_is(expect);
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: host paths not visible")]
 fn test_realpath_long_redirection_to_current_dir() {
     let (at, mut ucmd) = at_and_ucmd!();
     // Create a 256-character path to current directory
@@ -41,6 +43,7 @@ fn test_realpath_long_redirection_to_root() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: absolute symlink targets")]
 fn test_realpath_file_and_links() {
     let scene = TestScenario::new(util_name!());
     let at = &scene.fixtures;
@@ -53,6 +56,7 @@ fn test_realpath_file_and_links() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: absolute symlink targets")]
 fn test_realpath_file_and_links_zero() {
     let scene = TestScenario::new(util_name!());
     let at = &scene.fixtures;
@@ -130,6 +134,7 @@ fn test_realpath_file_and_links_strip_zero() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: absolute symlink targets")]
 fn test_realpath_physical_mode() {
     let scene = TestScenario::new(util_name!());
     let at = &scene.fixtures;
@@ -163,6 +168,7 @@ fn test_realpath_logical_mode() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: host paths not visible")]
 fn test_realpath_dangling() {
     let (at, mut ucmd) = at_and_ucmd!();
     at.symlink_file("nonexistent-file", "link");
@@ -178,6 +184,7 @@ fn test_realpath_dangling() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: absolute symlink targets")]
 fn test_realpath_loop() {
     let (at, mut ucmd) = at_and_ucmd!();
     at.symlink_file("2", "1");
@@ -225,6 +232,7 @@ fn test_realpath_symlink_follow_limit() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: host paths not visible")]
 fn test_realpath_default_allows_final_non_existent() {
     let p = Path::new("").join(GIBBERISH);
     let (at, mut ucmd) = at_and_ucmd!();
@@ -239,6 +247,7 @@ fn test_realpath_default_forbids_non_final_non_existent() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: host paths not visible")]
 fn test_realpath_existing() {
     let (at, mut ucmd) = at_and_ucmd!();
     ucmd.arg("-e")
@@ -261,6 +270,7 @@ fn test_realpath_existing_error_quiet() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: host paths not visible")]
 fn test_realpath_missing() {
     let p = Path::new("").join(GIBBERISH).join(GIBBERISH);
     let (at, mut ucmd) = at_and_ucmd!();
@@ -272,6 +282,7 @@ fn test_realpath_missing() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: host paths not visible")]
 fn test_realpath_when_symlink_is_absolute_and_enoent() {
     let (at, mut ucmd) = at_and_ucmd!();
 
@@ -303,6 +314,7 @@ fn test_realpath_when_symlink_is_absolute_and_enoent() {
 }
 
 #[test]
+#[cfg_attr(wasi_runner, ignore = "WASI sandbox: absolute symlink targets")]
 fn test_realpath_when_symlink_part_is_missing() {
     let (at, mut ucmd) = at_and_ucmd!();
 
@@ -557,6 +569,7 @@ fn test_realpath_empty() {
 
 #[test]
 #[cfg(target_os = "linux")]
+#[cfg_attr(wasi_runner, ignore = "WASI: argv/filenames must be valid UTF-8")]
 fn test_realpath_non_utf8_paths() {
     use std::ffi::OsStr;
     use std::os::unix::ffi::OsStrExt;