test: port previously-ignored Composer tests via __ test hatches

Re-evaluate the reason'd #[ignore] tests under the Phase D criterion:
a test is unportable ONLY if the APIs/types needed to WRITE it do not
exist. A test that compiles but panics at runtime (todo!() body, a
regex the regex crate cannot compile) or fails at runtime (incomplete
or incorrect impl behavior) is portable -- it is written in full and
marked with a reason-less #[ignore].

About 120 test functions move from reason'd #[ignore] to reason-less
#[ignore] (the ported-but-not-yet-passing signal). Impl crates gain
only additive __ test hatches (init_command, pool, file_downloader,
package handle link setters, artifact/path repository, repository
manager, svn); no existing logic changes. Tests whose required APIs
genuinely do not exist (mock/reflection harness, ApplicationTester,
solve() discarding SolverProblemsException, a script::Event that
cannot be passed as an originating event) keep their reason'd
#[ignore].

cargo check -p shirabe --tests passes.

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

1 files changed, 15 insertions, 0 deletions

diff --git a/crates/shirabe/src/util/svn.rs b/crates/shirabe/src/util/svn.rs
index 319edaf..0a3daf3 100644
--- a/crates/shirabe/src/util/svn.rs
+++ b/crates/shirabe/src/util/svn.rs
@@ -303,6 +303,21 @@ impl Svn {
         args
     }
 
+    /// For testing only: invoke the crate-private `get_command`.
+    pub fn __get_command(
+        &mut self,
+        cmd: Vec<String>,
+        url: &str,
+        path: Option<&str>,
+    ) -> Vec<String> {
+        self.get_command(cmd, url, path)
+    }
+
+    /// For testing only: invoke the crate-private `get_credential_args`.
+    pub fn __get_credential_args(&mut self) -> Vec<String> {
+        self.get_credential_args()
+    }
+
     /// Get the password for the svn command. Can be empty.
     ///
     /// @throws \LogicException