it: test subsurface positioning

src/it/tests/t0007_subsurface.rs

@@ -0,0 +1,55 @@
+use {
+    crate::{
+        format::ARGB8888,
+        it::{test_error::TestError, testrun::TestRun},
+        theme::Color,
+    },
+    std::rc::Rc,
+};
+
+testcase!();
+
+async fn test(run: Rc<TestRun>) -> Result<(), TestError> {
+    run.backend.install_default();
+
+    let seat = run.get_seat("default")?;
+
+    run.state.eng.yield_now().await;
+
+    run.cfg.show_workspace(seat.id(), "")?;
+
+    let client = run.create_client().await?;
+
+    let parent = client.create_window().await?;
+    parent.map().await?;
+    parent.set_color(0, 0, 0, 255);
+
+    let child = client.comp.create_surface().await?;
+    let sub = client
+        .sub
+        .get_subsurface(child.id, parent.surface.id)
+        .await?;
+    sub.set_position(100, 100)?;
+
+    let pool = client.shm.create_pool(100 * 100 * 4)?;
+    let buffer = pool.create_buffer(0, 100, 100, 100 * 4, ARGB8888)?;
+    buffer.fill(Color::from_rgba_straight(255, 255, 255, 255));
+
+    child.attach(buffer.id)?;
+
+    parent.map().await?;
+
+    seat.set_app_cursor(None);
+
+    client.compare_screenshot("1").await?;
+
+    sub.place_below(parent.surface.id)?;
+    parent.map().await?;
+    client.compare_screenshot("2").await?;
+
+    sub.place_above(parent.surface.id)?;
+    parent.map().await?;
+    client.compare_screenshot("1").await?;
+
+    Ok(())
+}