Demonstrate: test that will pass in real system

tests/pass-dep/libc/libc-epoll.rs

@@ -99,7 +99,7 @@ fn test_epoll_socketpair() {
 
     // Check result from epoll_wait.
     // We expect to get a read, write, HUP notification from the close since closing an FD always unblocks reads and writes on its peer.
-    let expected_event = u32::try_from(libc::EPOLLRDHUP | libc::EPOLLIN | libc::EPOLLOUT).unwrap();
+    let expected_event = u32::try_from(libc::EPOLLRDHUP | libc::EPOLLIN | libc::EPOLLOUT | libc::EPOLLHUP).unwrap();
     let expected_value = u64::try_from(fds[1]).unwrap();
     assert!(check_epoll_wait::<8>(epfd, &[(expected_event, expected_value)]));
 }
@@ -484,9 +484,9 @@ fn test_socketpair_read() {
 
     // Notification will be provided.
     // But in real system, no notification will be provided here.
-    let expected_event = u32::try_from(libc::EPOLLOUT).unwrap();
-    let expected_value = fds[1] as u64;
-    assert!(check_epoll_wait::<8>(epfd, &[(expected_event, expected_value)]));
+    //let expected_event = u32::try_from(libc::EPOLLOUT).unwrap();
+    //let expected_value = fds[1] as u64;
+    assert!(check_epoll_wait::<8>(epfd, &[]));
 
     // Read until the buffer is empty.
     let mut buf: [u8; 2] = [0; 2];