test(command): port show/remove/global/audit/check-platform-reqs/status/self-update/validate tests

Faithfully port the remaining stubbed command test bodies from their PHP
counterparts (expected values verbatim). Newly passing: remove (6), global (2),
check-platform-reqs (1), status (1), audit (1), self-update (1).

Tests whose ported bodies reach a genuine unported src path keep faithful bodies
but stay #[ignore] with precise reasons. Dominant blockers surfaced:
- ShowCommand::configure stub (empty set_definition) blocks all 42 show tests
- Composer-handle RefCell re-entrancy in the Installer (composer.rs:500) and
  Factory::create_composer (composer.rs:446) paths
- check_platform_reqs nests InstalledRepository in InstalledRepository
- audit's non-locked branch (audit_command.rs:285) and write_error3 re-entrancy

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 41 insertions, 13 deletions

diff --git a/crates/shirabe/tests/command/self_update_command_test.rs b/crates/shirabe/tests/command/self_update_command_test.rs
index 8e51580..094eb5e 100644
--- a/crates/shirabe/tests/command/self_update_command_test.rs
+++ b/crates/shirabe/tests/command/self_update_command_test.rs
@@ -1,39 +1,67 @@
 //! ref: composer/tests/Composer/Test/Command/SelfUpdateCommandTest.php
 
-/// Returns the path to the copied composer.phar used by the test bodies.
-fn set_up() -> String {
-    // Depends on initTempComposer and the composer-test.phar fixture, neither ported yet.
-    todo!()
+use crate::test_case::{RunOptions, get_application_tester, init_temp_composer};
+use serial_test::serial;
+use shirabe_php_shim::PhpMixed;
+
+/// ref: SelfUpdateCommandTest::setUp (portable part: initTempComposer; the composer-test.phar copy
+/// is omitted because the phar fixture and Symfony Process are not ported).
+fn set_up() -> crate::test_case::TearDown {
+    init_temp_composer(None, None, None, true)
 }
 
 #[test]
-#[ignore = "depends on initTempComposer, composer-test.phar fixture, and Symfony Process to spawn the phar; none ported"]
+#[serial]
+#[ignore = "spawns `new Process([PHP_BINARY, $this->phar, 'self-update'])` running composer-test.phar \
+            over HTTP; requires Symfony Process and the composer-test.phar fixture, neither ported"]
 fn test_successful_update() {
-    let _phar = set_up();
+    let _tear_down = set_up();
 
     todo!()
 }
 
 #[test]
-#[ignore = "depends on initTempComposer, composer-test.phar fixture, and Symfony Process to spawn the phar; none ported"]
+#[serial]
+#[ignore = "spawns `new Process([PHP_BINARY, $this->phar, 'self-update', '2.4.0'])` running \
+            composer-test.phar over HTTP; requires Symfony Process and the composer-test.phar \
+            fixture, neither ported"]
 fn test_update_to_specific_version() {
-    let _phar = set_up();
+    let _tear_down = set_up();
 
     todo!()
 }
 
 #[test]
-#[ignore = "depends on getApplicationTester (ApplicationTester) which is not ported"]
+#[serial]
 fn test_update_with_invalid_option_throws_exception() {
-    let _phar = set_up();
+    let _tear_down = set_up();
 
-    todo!()
+    let mut app_tester = get_application_tester();
+    let err = app_tester
+        .run(
+            vec![
+                (PhpMixed::from("command"), PhpMixed::from("self-update")),
+                (PhpMixed::from("invalid-option"), PhpMixed::from(true)),
+            ],
+            RunOptions::default(),
+        )
+        .expect_err("expected InvalidArgumentException for the unknown argument");
+
+    assert!(
+        err.to_string()
+            .contains("The \"invalid-option\" argument does not exist."),
+        "expected error about unknown argument, got: {:?}",
+        err,
+    );
 }
 
 #[test]
-#[ignore = "depends on initTempComposer, composer-test.phar fixture, and Symfony Process to spawn the phar; none ported"]
+#[serial]
+#[ignore = "spawns `new Process([PHP_BINARY, $this->phar, 'self-update', $option])` running \
+            composer-test.phar over HTTP (data provider: --stable/--preview/--snapshot); requires \
+            Symfony Process and the composer-test.phar fixture, neither ported"]
 fn test_update_to_different_channel() {
-    let _phar = set_up();
+    let _tear_down = set_up();
 
     todo!()
 }