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! {

src/it/test_ifs/test_region.rs

@@ -0,0 +1,81 @@
+use {
+    crate::{
+        ifs::wl_region::WlRegion,
+        it::{
+            test_error::TestError,
+            test_object::{Deleted, TestObject},
+            test_transport::TestTransport,
+        },
+        rect::{Rect, RegionBuilder},
+        wire::{wl_region::*, WlRegionId},
+    },
+    std::{
+        cell::{Cell, RefCell},
+        rc::Rc,
+    },
+};
+
+pub struct TestRegion {
+    pub id: WlRegionId,
+    pub tran: Rc<TestTransport>,
+    pub destroyed: Cell<bool>,
+    pub deleted: Deleted,
+    pub server: Rc<WlRegion>,
+    pub expected: RefCell<RegionBuilder>,
+}
+
+impl TestRegion {
+    pub fn destroy(&self) -> Result<(), TestError> {
+        self.deleted.check()?;
+        if !self.destroyed.replace(true) {
+            self.tran.send(Destroy { self_id: self.id });
+        }
+        Ok(())
+    }
+
+    pub fn add(&self, rect: Rect) -> Result<(), TestError> {
+        self.deleted.check()?;
+        self.expected.borrow_mut().add(rect);
+        self.tran.send(Add {
+            self_id: self.id,
+            x: rect.x1(),
+            y: rect.y1(),
+            width: rect.width(),
+            height: rect.height(),
+        });
+        Ok(())
+    }
+
+    pub fn subtract(&self, rect: Rect) -> Result<(), TestError> {
+        self.deleted.check()?;
+        self.expected.borrow_mut().sub(rect);
+        self.tran.send(Subtract {
+            self_id: self.id,
+            x: rect.x1(),
+            y: rect.y1(),
+            width: rect.width(),
+            height: rect.height(),
+        });
+        Ok(())
+    }
+
+    pub async fn check(&self) -> Result<(), TestError> {
+        self.tran.sync().await;
+        let expected = self.expected.borrow_mut().get();
+        let actual = self.server.region();
+        tassert_eq!(expected, actual);
+        Ok(())
+    }
+}
+
+impl Drop for TestRegion {
+    fn drop(&mut self) {
+        let _ = self.destroy();
+    }
+}
+
+test_object! {
+    TestRegion, WlRegion;
+}
+
+impl TestObject for TestRegion {}