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extern crate sif_macro;

pub use sif_macro::parameterized;

/// Attribute macro's such as 'parameterized' do not enable the run tests intent for a module
/// marked as cfg(test) (or a #[test] function for that matter) in Intellij.
///
/// To enable the intent within a module, we need at least a single test marked with `#[test]`.
/// The `ide!()` acro is a work around for this issue and creates this empty test. It can be called
/// within every module where we wish to run test cases using the run configuration / run test context
/// menu.
///
/// Using the intellij-rust new macro expansion engine, if this macro is called within a module,
/// the module will be marked as test, and the 'run as test' context menu will be provided in the
/// gutter.
#[macro_export]
macro_rules! ide {
    () => {
        #[test]
        fn __marked_with_test_intent() {}
    };
}

#[cfg(test)]
mod tests {
    use crate::parameterized;

    fn add5<T: Into<u32>>(component: T) -> u32 {
        component.into() + 5
    }

    mod readme_test {
        use super::*;

        ide!();

        #[parameterized]
        #[case(0, 5)]
        #[case(1, 6)]
        #[case(2, 7)]
        fn test_add5(input: u16, expected: u32) {
            assert_eq!(add5(input), expected)
        }
    }

    mod marked_as_test_module {
        use super::*;

        ide!();

        #[parameterized]
        #[case(-3, -6)]
        #[case(-2, -4)]
        #[case(-1, -2)]
        #[case(0, 0)]
        #[case(1, 2)]
        #[case(2, 4)]
        #[case(3, 6)]
        fn test_times2(input: i32, output: i32) {
            let times2 = |receiver: i32| receiver * 2;

            assert_eq!(times2(input), output);
        }
    }

    mod transitive_attrs {
        use super::*;

        ide!();

        #[parameterized]
        #[case(None)]
        #[case(None)]
        #[case(None)]
        #[should_panic]
        fn numbers(input: Option<()>) {
            input.unwrap()
        }
    }
}