test(cache): port CacheTest

clearCache verified against a real Cache over a temp dir; the gc() cases mock
Cache::getFinder (not overridable from a test) and are stubbed. setUp/tearDown
not ported.

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

1 files changed, 38 insertions, 0 deletions

diff --git a/crates/shirabe/tests/cache_test.rs b/crates/shirabe/tests/cache_test.rs
index c03f42b..3849705 100644
--- a/crates/shirabe/tests/cache_test.rs
+++ b/crates/shirabe/tests/cache_test.rs
@@ -1 +1,39 @@
 //! ref: composer/tests/Composer/Test/CacheTest.php
+
+use std::cell::RefCell;
+use std::rc::Rc;
+
+use shirabe::cache::Cache;
+use shirabe::io::IOInterface;
+use shirabe::io::null_io::NullIO;
+use tempfile::TempDir;
+
+// In PHP these mock Cache::getFinder() to feed the gc() routine a controlled set of
+// files. getFinder is pub(crate) and cannot be overridden from a test, so the
+// finder-driven removal paths cannot be exercised faithfully here.
+#[test]
+#[ignore = "mocks Cache::getFinder to drive gc(); getFinder cannot be overridden from a test"]
+fn test_remove_outdated_files() {
+    todo!()
+}
+
+#[test]
+#[ignore = "mocks Cache::getFinder to drive gc(); getFinder cannot be overridden from a test"]
+fn test_remove_files_when_cache_is_too_large() {
+    todo!()
+}
+
+#[test]
+fn test_clear_cache() {
+    let root = TempDir::new().unwrap();
+    let io: Rc<RefCell<dyn IOInterface>> = Rc::new(RefCell::new(NullIO::new()));
+    let mut cache = Cache::new(
+        io,
+        root.path().to_str().unwrap(),
+        Some("a-z0-9."),
+        None,
+        false,
+    );
+
+    assert!(cache.clear());
+}