add test cases, refactor deref

examples/backgrounded_futures.rs

@@ -0,0 +1,55 @@
+use dioxus::prelude::*;
+
+fn main() {
+    launch_desktop(app);
+}
+
+fn app() -> Element {
+    let mut show_child = use_signal(|| true);
+    let mut count = use_signal(|| 0);
+
+    let child = use_memo(move || {
+        rsx! {
+            Child {
+                count
+            }
+        }
+    });
+
+    rsx! {
+        button { onclick: move |_| show_child.toggle(), "Toggle child" }
+        button { onclick: move |_| count += 1, "Increment count" }
+        if show_child() {
+            {child.cloned()}
+        }
+    }
+}
+
+#[component]
+fn Child(count: Signal<i32>) -> Element {
+    let mut early_return = use_signal(|| false);
+
+    let early = rsx! {
+        button { onclick: move |_| early_return.toggle(), "Toggle {early_return} early return" }
+    };
+
+    if early_return() {
+        return early;
+    }
+
+    use_future(move || async move {
+        loop {
+            tokio::time::sleep(std::time::Duration::from_millis(100)).await;
+            println!("Child")
+        }
+    });
+
+    use_effect(move || {
+        println!("Child count: {}", count());
+    });
+
+    rsx! {
+        "hellO!"
+        {early}
+    }
+}