test(command): port InitCommandTest

Port the pure-method cases (parse/namespace/formatAuthors/git/vendor-ignore)
and build the ApplicationTester / initTempComposer harness the run cases need.

Supporting production changes:
- carry the streamable input stream as PhpResource (not PhpMixed) and add
  InputInterface::as_streamable so QuestionHelper reads the injected stream
- add StreamOutput/ConsoleOutput __set_stream test helpers and
  ApplicationHandle::set_catch_exceptions for the tester
- implement the interact() author validator via parse_author_string

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

1 files changed, 7 insertions, 0 deletions

diff --git a/crates/shirabe-external-packages/src/symfony/console/output/console_output.rs b/crates/shirabe-external-packages/src/symfony/console/output/console_output.rs
index 0808fef..dd6840d 100644
--- a/crates/shirabe-external-packages/src/symfony/console/output/console_output.rs
+++ b/crates/shirabe-external-packages/src/symfony/console/output/console_output.rs
@@ -110,6 +110,13 @@ impl ConsoleOutput {
         shirabe_php_shim::stripos(&shirabe_php_shim::implode(";", &checks), "OS400").is_some()
     }
 
+    /// For testing only. Overwrites the inner `StreamOutput`'s private `stream` field, mirroring
+    /// what `Symfony\Component\Console\Tester\TesterTrait::initOutput` does via reflection on the
+    /// parent `StreamOutput::$stream` property of a `ConsoleOutput`.
+    pub fn __set_stream(&mut self, stream: shirabe_php_shim::PhpResource) {
+        self.inner.__set_stream(stream);
+    }
+
     fn open_output_stream() -> shirabe_php_shim::PhpResource {
         if !Self::has_stdout_support() {
             return shirabe_php_shim::php_fopen_resource("php://output", "w");