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, 32 insertions, 0 deletions

diff --git a/crates/shirabe/tests/config/json_config_source_test.rs b/crates/shirabe/tests/config/json_config_source_test.rs
index 293f32e..bab36a9 100644
--- a/crates/shirabe/tests/config/json_config_source_test.rs
+++ b/crates/shirabe/tests/config/json_config_source_test.rs
@@ -1,5 +1,36 @@
 //! ref: composer/tests/Composer/Test/Config/JsonConfigSourceTest.php
 
+use shirabe::util::filesystem::Filesystem;
+use std::path::PathBuf;
+use tempfile::TempDir;
+
+fn set_up() -> TearDown {
+    let fs = Filesystem::new(None);
+    // getUniqueTmpDirectory creates a fresh unique temp directory.
+    let working_dir = TempDir::new().unwrap();
+    TearDown { fs, working_dir }
+}
+
+struct TearDown {
+    fs: Filesystem,
+    working_dir: TempDir,
+}
+
+impl TearDown {
+    fn working_dir(&self) -> PathBuf {
+        self.working_dir.path().to_path_buf()
+    }
+}
+
+impl Drop for TearDown {
+    fn drop(&mut self) {
+        let working_dir = self.working_dir.path();
+        if working_dir.is_dir() {
+            self.fs.remove_directory(working_dir).unwrap();
+        }
+    }
+}
+
 // JsonConfigSource edits composer.json through JsonManipulator, whose text-rewriting
 // operations reach addcslashes (todo!()) in the php-shim.
 macro_rules! stub {
@@ -7,6 +38,7 @@ macro_rules! stub {
         #[test]
         #[ignore = "JsonConfigSource uses JsonManipulator, which reaches addcslashes (todo!()) in the php-shim"]
         fn $name() {
+            let _tear_down = set_up();
             todo!()
         }
     };