mockall 0.9.1

// vim: tw=80
//! automock can work directly on extern blocks, though it's deprecated
#![allow(deprecated)]
#![deny(warnings)]

use mockall::*;

#[automock(mod mock_ffi;)]
extern "C" {
    #[allow(unused)]
    fn foo(x: u32) -> i64;
    // Every should_panic method needs to operate on a separate method so it
    // doesn't poison other tests
    #[allow(unused)]
    fn foo1(x: u32) -> i64;
}

#[test]
#[cfg_attr(feature = "nightly", should_panic(
        expected = "mock_ffi::foo1(5): No matching expectation found"
))]
#[cfg_attr(not(feature = "nightly"), should_panic(
        expected = "mock_ffi::foo1(?): No matching expectation found"
))]
fn with_no_matches() {
    let ctx = mock_ffi::foo1_context();
    ctx.expect()
        .with(predicate::eq(4))
        .returning(i64::from);
    unsafe{ mock_ffi::foo1(5) };
}

#[test]
fn returning() {
    let ctx = mock_ffi::foo_context();
    ctx.expect().returning(i64::from);
    assert_eq!(42, unsafe{mock_ffi::foo(42)});
}