1 files changed, 6 insertions, 0 deletions
diff --git a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/StageTaskListenerTests.java b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/StageTaskListenerTests.java
index b31e20fcc438..5ee8bf3006a3 100644
--- a/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/StageTaskListenerTests.java
+++ b/libs/WindowManager/Shell/tests/unittest/src/com/android/wm/shell/splitscreen/StageTaskListenerTests.java
@@ -126,6 +126,12 @@ public final class StageTaskListenerTests extends ShellTestCase {
         verify(mCallbacks).onStatusChanged(eq(mRootTask.isVisible), eq(true));
     }
 
+    @Test(expected = IllegalArgumentException.class)
+    public void testUnknownTaskVanished() {
+        final ActivityManager.RunningTaskInfo task = new TestRunningTaskInfoBuilder().build();
+        mStageTaskListener.onTaskVanished(task);
+    }
+
     @Test
     public void testTaskVanished() {
         // With shell transitions, the transition manages status changes, so skip this test.