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, 10 insertions, 0 deletions

diff --git a/crates/shirabe/tests/platform/hhvm_detector_test.rs b/crates/shirabe/tests/platform/hhvm_detector_test.rs
index 8c420e5..1b35450 100644
--- a/crates/shirabe/tests/platform/hhvm_detector_test.rs
+++ b/crates/shirabe/tests/platform/hhvm_detector_test.rs
@@ -1,13 +1,23 @@
 //! ref: composer/tests/Composer/Test/Platform/HhvmDetectorTest.php
 
+use shirabe::platform::hhvm_detector::HhvmDetector;
+
+fn set_up() -> HhvmDetector {
+    let hhvm_detector = HhvmDetector::new(None, None);
+    hhvm_detector.reset();
+    hhvm_detector
+}
+
 #[test]
 #[ignore = "skipped unless running under HHVM (HHVM_VERSION_ID defined), which never holds here"]
 fn test_hhvm_version_when_executing_in_hhvm() {
+    let _hhvm_detector = set_up();
     todo!()
 }
 
 #[test]
 #[ignore = "needs an installed hhvm executable plus ExecutableFinder/ProcessExecutor; skipped in PHP when hhvm is absent"]
 fn test_hhvm_version_when_executing_in_php() {
+    let _hhvm_detector = set_up();
     todo!()
 }