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, 25 insertions, 0 deletions

diff --git a/crates/shirabe/tests/package/archiver/archive_manager_test.rs b/crates/shirabe/tests/package/archiver/archive_manager_test.rs
index 5f9e413..912512d 100644
--- a/crates/shirabe/tests/package/archiver/archive_manager_test.rs
+++ b/crates/shirabe/tests/package/archiver/archive_manager_test.rs
@@ -1,5 +1,30 @@
 //! ref: composer/tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php
 
+/// Builds an ArchiveManager via Factory/DownloadManager/Loop and derives targetDir under a
+/// unique tmp dir (testDir); none of that factory/fixture infrastructure is ported.
+/// Returns (test_dir, target_dir).
+#[allow(dead_code)]
+fn set_up() -> (String, String) {
+    todo!()
+}
+
+#[allow(dead_code)]
+fn tear_down(_test_dir: &str) {
+    // Removes testDir created in set_up.
+    todo!()
+}
+
+#[allow(dead_code)]
+struct TearDown {
+    test_dir: String,
+}
+
+impl Drop for TearDown {
+    fn drop(&mut self) {
+        tear_down(&self.test_dir);
+    }
+}
+
 // These drive ArchiveManager end-to-end (building tar archives via PharData, todo!()) and
 // the filename-derivation helpers over packages; the archiving and fixture setup are not
 // ported.