Make JS compose window lifecycle tests robustly handle window focus

Author: cedrickcooke

compose/ui/ui/src/webTest/kotlin/androidx/compose/ui/window/ComposeWindowLifecycleTest.kt

@@ -54,9 +54,13 @@ class ComposeWindowLifecycleTest : OnCanvasTests {
 
         assertEquals(Lifecycle.State.CREATED, eventsChannel.receive().targetState)
         assertEquals(Lifecycle.State.STARTED, eventsChannel.receive().targetState)
-        assertEquals(Lifecycle.State.RESUMED, eventsChannel.receive().targetState)
 
-        // Dispatch artificial events that would be sent when the window loses and regains focus.
+        // Dispatch artificial events that would be sent when the window gains and loses focus.
+        // Starting with a focus event before checking for the initial RESUMED makes this test
+        // robust in the face of both an actually-focused window and a non-focused window. Then,
+        // a blur + focus cycle simulates losing focus and regaining it.
+        window.dispatchEvent(Event("focus"))
+        assertEquals(Lifecycle.State.RESUMED, eventsChannel.receive().targetState)
         window.dispatchEvent(Event("blur"))
         assertEquals(Lifecycle.State.STARTED, eventsChannel.receive().targetState)
         window.dispatchEvent(Event("focus"))