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, 22 insertions, 0 deletions

diff --git a/crates/shirabe/tests/autoload/autoload_generator_test.rs b/crates/shirabe/tests/autoload/autoload_generator_test.rs
index ecd6e4e..6b7c11a 100644
--- a/crates/shirabe/tests/autoload/autoload_generator_test.rs
+++ b/crates/shirabe/tests/autoload/autoload_generator_test.rs
@@ -1,5 +1,27 @@
 //! ref: composer/tests/Composer/Test/Autoload/AutoloadGeneratorTest.php
 
+/// Creates the working/vendor temp directories, switches into the working dir, and
+/// builds the AutoloadGenerator from a mocked Config/InstallationManager/
+/// InstalledRepository/EventDispatcher and a BufferIO. The mocks and temp-dir
+/// helpers are not available here, so this remains a stub.
+fn set_up() {
+    todo!()
+}
+
+/// Restores the original working directory and removes the working/vendor
+/// directories created by `set_up`, which is itself a stub.
+fn tear_down() {
+    todo!()
+}
+
+struct TearDown;
+
+impl Drop for TearDown {
+    fn drop(&mut self) {
+        tear_down();
+    }
+}
+
 // These exercise AutoloadGenerator end-to-end: they build packages, write fixture files to
 // a temp dir, run dump() through a mocked InstalledRepository/EventDispatcher and compare
 // the generated autoload files. The integration setup (fixtures, mocks, filesystem) is not