Add unmap-from-floating test

Hits a code path that reads the last acked state after unmapping.

2 files changed, 21 insertions, 0 deletions

diff --git a/src/tests/client.rs b/src/tests/client.rs
index d118e472..fc61c2ac 100644
--- a/src/tests/client.rs
+++ b/src/tests/client.rs
@@ -341,6 +341,10 @@ impl Window {
         self.surface.attach(Some(&buffer), 0, 0);
     }
 
+    pub fn attach_null(&self) {
+        self.surface.attach(None, 0, 0);
+    }
+
     pub fn set_size(&self, w: u16, h: u16) {
         self.viewport.set_destination(i32::from(w), i32::from(h));
     }
diff --git a/src/tests/floating.rs b/src/tests/floating.rs
index b2eaabfb..4d0b9383 100644
--- a/src/tests/floating.rs
+++ b/src/tests/floating.rs
@@ -856,6 +856,23 @@ window-rule {
 }
 
 #[test]
+fn unmap_from_floating() {
+    let (mut f, id, surface) = set_up();
+
+    f.niri().layout.toggle_window_floating(None);
+    f.double_roundtrip(id);
+    let _ = f.client(id).window(&surface).recent_configures();
+
+    // Resize to something different on both axes.
+    let window = f.client(id).window(&surface);
+    window.attach_null();
+    window.commit();
+
+    // Shouldn't panic.
+    f.double_roundtrip(id);
+}
+
+#[test]
 fn unfullscreen_to_floating_doesnt_send_extra_configure() {
     let (mut f, id, surface) = set_up();