src/tools/clippy/tests/ui/missing_assert_message.rs

//@revisions: edition2015 edition2021
//@[edition2015] edition:2015
//@[edition2021] edition:2021

#![warn(clippy::missing_assert_message)]

macro_rules! bar {
    ($( $x:expr ),*) => {
        foo()
    };
}

// Should trigger warning
fn asserts_without_message() {
    assert!(foo());
    //~^ ERROR: assert without any message
    assert_eq!(foo(), foo());
    //~^ ERROR: assert without any message
    assert_ne!(foo(), foo());
    //~^ ERROR: assert without any message
    debug_assert!(foo());
    //~^ ERROR: assert without any message
    debug_assert_eq!(foo(), foo());
    //~^ ERROR: assert without any message
    debug_assert_ne!(foo(), foo());
    //~^ ERROR: assert without any message
}

// Should trigger warning
fn asserts_without_message_but_with_macro_calls() {
    assert!(bar!(true));
    //~^ ERROR: assert without any message
    assert!(bar!(true, false));
    //~^ ERROR: assert without any message
    assert_eq!(bar!(true), foo());
    //~^ ERROR: assert without any message
    assert_ne!(bar!(true, true), bar!(true));
    //~^ ERROR: assert without any message
}

// Should trigger warning
fn asserts_with_trailing_commas() {
    assert!(foo(),);
    //~^ ERROR: assert without any message
    assert_eq!(foo(), foo(),);
    //~^ ERROR: assert without any message
    assert_ne!(foo(), foo(),);
    //~^ ERROR: assert without any message
    debug_assert!(foo(),);
    //~^ ERROR: assert without any message
    debug_assert_eq!(foo(), foo(),);
    //~^ ERROR: assert without any message
    debug_assert_ne!(foo(), foo(),);
    //~^ ERROR: assert without any message
}

// Should not trigger warning
fn asserts_with_message_and_with_macro_calls() {
    assert!(bar!(true), "msg");
    assert!(bar!(true, false), "msg");
    assert_eq!(bar!(true), foo(), "msg");
    assert_ne!(bar!(true, true), bar!(true), "msg");
}

// Should not trigger warning
fn asserts_with_message() {
    assert!(foo(), "msg");
    assert_eq!(foo(), foo(), "msg");
    assert_ne!(foo(), foo(), "msg");
    debug_assert!(foo(), "msg");
    debug_assert_eq!(foo(), foo(), "msg");
    debug_assert_ne!(foo(), foo(), "msg");
}

// Should not trigger warning
#[test]
fn asserts_without_message_but_inside_a_test_function() {
    assert!(foo());
    assert_eq!(foo(), foo());
    assert_ne!(foo(), foo());
    debug_assert!(foo());
    debug_assert_eq!(foo(), foo());
    debug_assert_ne!(foo(), foo());
}

fn foo() -> bool {
    true
}

// Should not trigger warning
#[cfg(test)]
mod tests {
    use super::foo;
    fn asserts_without_message_but_inside_a_test_module() {
        assert!(foo());
        assert_eq!(foo(), foo());
        assert_ne!(foo(), foo());
        debug_assert!(foo());
        debug_assert_eq!(foo(), foo());
        debug_assert_ne!(foo(), foo());
    }
}