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, 54 insertions, 0 deletions

diff --git a/crates/shirabe/tests/cache_test.rs b/crates/shirabe/tests/cache_test.rs
index 3849705..1e346cf 100644
--- a/crates/shirabe/tests/cache_test.rs
+++ b/crates/shirabe/tests/cache_test.rs
@@ -1,25 +1,79 @@
 //! ref: composer/tests/Composer/Test/CacheTest.php
 
 use std::cell::RefCell;
+use std::fs;
 use std::rc::Rc;
 
 use shirabe::cache::Cache;
 use shirabe::io::IOInterface;
 use shirabe::io::null_io::NullIO;
+use shirabe::util::filesystem::Filesystem;
 use tempfile::TempDir;
 
+struct SetUp {
+    root: TempDir,
+    files: Vec<std::path::PathBuf>,
+    cache: Cache,
+}
+
+fn set_up() -> SetUp {
+    let root = TempDir::new().unwrap();
+    let mut files: Vec<std::path::PathBuf> = Vec::new();
+    let zeros = "0".repeat(1000);
+
+    for i in 0..4 {
+        let path = root.path().join(format!("cached.file{}.zip", i));
+        fs::write(&path, &zeros).unwrap();
+        files.push(path);
+    }
+
+    // The finder/filesystem/IO mocks and the Cache mock overriding getFinder are not ported.
+    let cache: Cache = todo!();
+
+    SetUp { root, files, cache }
+}
+
+fn tear_down(root: &std::path::Path) {
+    if root.is_dir() {
+        let mut fs = Filesystem::new(None);
+        fs.remove_directory(root).unwrap();
+    }
+}
+
+struct TearDown {
+    root: std::path::PathBuf,
+}
+
+impl TearDown {
+    fn new(root: std::path::PathBuf) -> Self {
+        TearDown { root }
+    }
+}
+
+impl Drop for TearDown {
+    fn drop(&mut self) {
+        tear_down(&self.root);
+    }
+}
+
 // In PHP these mock Cache::getFinder() to feed the gc() routine a controlled set of
 // files. getFinder is pub(crate) and cannot be overridden from a test, so the
 // finder-driven removal paths cannot be exercised faithfully here.
 #[test]
 #[ignore = "mocks Cache::getFinder to drive gc(); getFinder cannot be overridden from a test"]
 fn test_remove_outdated_files() {
+    let SetUp { root, files, cache } = set_up();
+    let _tear_down = TearDown::new(root.path().to_path_buf());
+    let _ = (&files, &cache);
     todo!()
 }
 
 #[test]
 #[ignore = "mocks Cache::getFinder to drive gc(); getFinder cannot be overridden from a test"]
 fn test_remove_files_when_cache_is_too_large() {
+    let SetUp { root, files, cache } = set_up();
+    let _tear_down = TearDown::new(root.path().to_path_buf());
+    let _ = (&files, &cache);
     todo!()
 }