it: test region creation

src/it/test_ifs/test_compositor.rs

@@ -2,11 +2,14 @@ use {
     crate::{
         it::{
             test_error::TestError,
-            test_ifs::test_surface::TestSurface,
+            test_ifs::{test_region::TestRegion, test_surface::TestSurface},
             test_object::{Deleted, TestObject},
             test_transport::TestTransport,
         },
-        wire::{wl_compositor::CreateSurface, WlCompositorId},
+        wire::{
+            wl_compositor::{CreateRegion, CreateSurface},
+            WlCompositorId,
+        },
     },
     std::{cell::Cell, rc::Rc},
 };
@@ -38,6 +41,28 @@ impl TestCompositor {
         self.tran.add_obj(surface.clone())?;
         Ok(surface)
     }
+
+    pub async fn create_region(&self) -> Result<Rc<TestRegion>, TestError> {
+        let id = self.tran.id();
+        self.deleted.check()?;
+        self.tran.send(CreateRegion {
+            self_id: self.id,
+            id,
+        });
+        self.tran.sync().await;
+        let client = self.tran.get_client()?;
+        let server = client.lookup(id)?;
+        let region = Rc::new(TestRegion {
+            id,
+            tran: self.tran.clone(),
+            server,
+            destroyed: Cell::new(false),
+            deleted: Default::default(),
+            expected: Default::default(),
+        });
+        self.tran.add_obj(region.clone())?;
+        Ok(region)
+    }
 }
 
 test_object! {