select_second

src/func/instances/future.rs

@@ -139,11 +139,13 @@ impl<'a> SharedFunctor<'a> for FutureInstance {
 
 #[cfg(test)]
 mod future_tests {
+    use crate::func::{applicative_select::Selected, tests::Eqr, ApplicativeSelect};
+
     use super::{test_suite, tests, FutureInstance};
 
     type T = FutureInstance;
 
-    impl<'a> tests::Eqr<'a> for T {
+    impl<'a> Eqr<'a> for T {
         fn eqr<A: 'a + Send + PartialEq + std::fmt::Debug>(
             name: &'a str,
             left: Self::F<A>,
@@ -167,4 +169,15 @@ mod future_tests {
     fn monad_follows_laws() {
         test_suite::monad_follows_laws::<T>().unwrap();
     }
+
+    #[test]
+    fn select_second() {
+        match futures::executor::block_on(T::select(
+            Box::pin(futures::future::pending::<i32>()),
+            Box::pin(futures::future::ready(2)),
+        )) {
+            Selected::A(_, _) => panic!("first future ready"),
+            Selected::B(_, b) => assert_eq!(b, 2),
+        }
+    }
 }