test(tests): port setUp/tearDown as set_up/tear_down with TearDown

Port PHP setUp/tearDown across the ported integration tests using
same-named set_up()/tear_down() functions and a TearDown struct whose
Drop runs tear_down(). Fixture-init setUp returns its fixtures;
tmpdir-style setUp/tearDown carry state in TearDown fields. Parts that
depend on unported infrastructure (PHPUnit mocks, Config::merge, the PHP
error handler) stay todo!() and are only wired into ignored stubs to
avoid breaking live tests.

Also fix shirabe-php-shim putenv to handle the no-'=' form (PHP unsets
the variable), which Platform::clear_env relies on for the env-clearing
tearDowns.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/crates/shirabe/tests/downloader/xz_downloader_test.rs b/crates/shirabe/tests/downloader/xz_downloader_test.rs
index 9650991..d01779b 100644
--- a/crates/shirabe/tests/downloader/xz_downloader_test.rs
+++ b/crates/shirabe/tests/downloader/xz_downloader_test.rs
@@ -1,7 +1,50 @@
 //! ref: composer/tests/Composer/Test/Downloader/XzDownloaderTest.php
 
+use shirabe::util::Platform;
+use shirabe::util::filesystem::Filesystem;
+use tempfile::TempDir;
+
+fn set_up() -> TempDir {
+    if Platform::is_windows() {
+        // markTestSkipped('Skip test on Windows')
+        todo!()
+    }
+    if std::mem::size_of::<usize>() == 4 {
+        // markTestSkipped('Skip test on 32bit')
+        todo!()
+    }
+    TempDir::new().unwrap()
+}
+
+fn tear_down(test_dir: &std::path::Path) {
+    if Platform::is_windows() {
+        return;
+    }
+    let mut fs = Filesystem::new(None);
+    fs.remove_directory(test_dir).unwrap();
+}
+
+struct TearDown {
+    test_dir: std::path::PathBuf,
+}
+
+impl TearDown {
+    fn new(test_dir: std::path::PathBuf) -> Self {
+        TearDown { test_dir }
+    }
+}
+
+impl Drop for TearDown {
+    fn drop(&mut self) {
+        tear_down(&self.test_dir);
+    }
+}
+
 #[test]
 #[ignore = "needs a real HttpDownloader/Loop and an XzDownloader download cycle; HttpDownloader construction reaches curl_multi_init (todo!()) in the php-shim"]
 fn test_error_messages() {
+    let test_dir = set_up();
+    let _tear_down = TearDown::new(test_dir.path().to_path_buf());
+    let _ = &test_dir;
     todo!()
 }