it: track whether objects have been deleted

src/it/test_ifs/test_surface.rs

@@ -2,7 +2,9 @@ use {
     crate::{
         ifs::wl_surface::WlSurface,
         it::{
-            test_error::TestError, test_object::TestObject, test_transport::TestTransport,
+            test_error::TestError,
+            test_object::{Deleted, TestObject},
+            test_transport::TestTransport,
             testrun::ParseFull,
         },
         utils::buffd::MsgParser,
@@ -16,26 +18,33 @@ pub struct TestSurface {
     pub tran: Rc<TestTransport>,
     pub server: Rc<WlSurface>,
     pub destroyed: Cell<bool>,
+    pub deleted: Deleted,
 }
 
 impl TestSurface {
-    pub fn destroy(&self) {
+    pub fn destroy(&self) -> Result<(), TestError> {
         if !self.destroyed.replace(true) {
+            self.deleted.check()?;
             self.tran.send(Destroy { self_id: self.id });
         }
+        Ok(())
     }
 
-    pub fn attach(&self, buffer_id: WlBufferId) {
+    pub fn attach(&self, buffer_id: WlBufferId) -> Result<(), TestError> {
+        self.deleted.check()?;
         self.tran.send(Attach {
             self_id: self.id,
             buffer: buffer_id,
             x: 0,
             y: 0,
         });
+        Ok(())
     }
 
-    pub fn commit(&self) {
+    pub fn commit(&self) -> Result<(), TestError> {
+        self.deleted.check()?;
         self.tran.send(Commit { self_id: self.id });
+        Ok(())
     }
 
     fn handle_enter(&self, parser: MsgParser<'_, '_>) -> Result<(), TestError> {
@@ -51,7 +60,7 @@ impl TestSurface {
 
 impl Drop for TestSurface {
     fn drop(&mut self) {
-        self.destroy();
+        let _ = self.destroy();
     }
 }