feat(plugin): remove subscribed listeners when a plugin is removed

Wire removePlugin to EventDispatcher::removeListener now that subscriber
listeners carry the plugin's P-table handle: PHP's $candidate[0] ===
$listener identity check maps to phandle equality on Callable::PhpMethod.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

3 files changed, 34 insertions, 0 deletions

diff --git a/crates/shirabe/tests/command/archive_command_test.rs b/crates/shirabe/tests/command/archive_command_test.rs
index 655020e0..6d20fda0 100644
--- a/crates/shirabe/tests/command/archive_command_test.rs
+++ b/crates/shirabe/tests/command/archive_command_test.rs
@@ -89,6 +89,7 @@ mockall::mock! {
             &mut self,
             subscriber: &'a dyn shirabe::event_dispatcher::EventSubscriberInterface,
         ) -> anyhow::Result<()>;
+        fn remove_listener<'a>(&mut self, listener: &'a shirabe_php_rpc::PhpObjHandle);
         fn has_event_listeners(&mut self, event: &dyn EventInterface) -> bool;
     }
 }
diff --git a/crates/shirabe/tests/installer_test.rs b/crates/shirabe/tests/installer_test.rs
index 1a8b7ccc..f5e84558 100644
--- a/crates/shirabe/tests/installer_test.rs
+++ b/crates/shirabe/tests/installer_test.rs
@@ -194,6 +194,7 @@ impl EventDispatcherInterface for StubEventDispatcher {
     ) -> anyhow::Result<()> {
         Ok(())
     }
+    fn remove_listener(&mut self, _listener: &shirabe_php_rpc::PhpObjHandle) {}
     fn has_event_listeners(&mut self, _event: &dyn EventInterface) -> bool {
         false
     }
diff --git a/crates/shirabe/tests/plugin/subscriber_test.rs b/crates/shirabe/tests/plugin/subscriber_test.rs
index 8de3d8c2..1d6a7ece 100644
--- a/crates/shirabe/tests/plugin/subscriber_test.rs
+++ b/crates/shirabe/tests/plugin/subscriber_test.rs
@@ -94,6 +94,38 @@ fn test_subscriber_listener_returning_false_sets_return_code() {
 }
 
 #[test]
+fn test_remove_plugin_removes_its_subscribed_listeners() {
+    if !php_runtime_available() {
+        return;
+    }
+    let _worker = lock_php_worker();
+    let set_up = set_up();
+    install_subscriber_plugin(&set_up);
+
+    assert_eq!(0, dispatch(&set_up, "post-install-cmd"));
+
+    let plugin = set_up
+        .pm
+        .borrow()
+        .get_plugins()
+        .iter()
+        .find(|p| p.borrow().get_class_name() == "Subscriber\\Plugin")
+        .expect("the subscriber plugin is registered")
+        .clone();
+    set_up.pm.borrow_mut().remove_plugin(&plugin).unwrap();
+
+    // removePlugin removed the plugin's `[$subscriber, 'onPostInstall']` listener, so the
+    // second dispatch produces no further output.
+    let return_code = dispatch(&set_up, "post-install-cmd");
+
+    assert_eq!(0, return_code);
+    assert_eq!(
+        "activate subscriber-v1\nsubscriber saw post-install-cmd\n",
+        set_up.io.borrow().get_output()
+    );
+}
+
+#[test]
 fn test_unrelated_event_does_not_reach_the_subscriber() {
     if !php_runtime_available() {
         return;