it: test toplevel drag

src/it/test_ifs/test_toplevel_drag.rs

@@ -0,0 +1,52 @@
+use {
+    crate::{
+        it::{
+            test_error::TestError, test_ifs::test_xdg_toplevel::TestXdgToplevel,
+            test_object::TestObject, test_transport::TestTransport,
+        },
+        wire::{xdg_toplevel_drag_v1::*, XdgToplevelDragV1Id},
+    },
+    std::{cell::Cell, rc::Rc},
+};
+
+pub struct TestToplevelDrag {
+    pub id: XdgToplevelDragV1Id,
+    pub tran: Rc<TestTransport>,
+    pub destroyed: Cell<bool>,
+}
+
+impl TestToplevelDrag {
+    pub fn destroy(&self) -> Result<(), TestError> {
+        if !self.destroyed.replace(true) {
+            self.tran.send(Destroy { self_id: self.id })?;
+        }
+        Ok(())
+    }
+
+    pub fn attach(
+        &self,
+        toplevel: &TestXdgToplevel,
+        x_offset: i32,
+        y_offset: i32,
+    ) -> Result<(), TestError> {
+        self.tran.send(Attach {
+            self_id: self.id,
+            toplevel: toplevel.core.id,
+            x_offset,
+            y_offset,
+        })?;
+        Ok(())
+    }
+}
+
+impl Drop for TestToplevelDrag {
+    fn drop(&mut self) {
+        let _ = self.destroy();
+    }
+}
+
+test_object! {
+    TestToplevelDrag, XdgToplevelDragV1;
+}
+
+impl TestObject for TestToplevelDrag {}