partial-context 0.1.0

#[cfg(feature = "derive")]
mod test_derive {
    use partial_context::PartialContext;

    #[derive(PartialContext, PartialEq, Eq, Debug, Clone)]
    #[context_needs(
        #[derive(Clone)]
    )]
    pub struct Test {
        pub abc: i64,
        #[context]
        pub def: usize,
    }

    fn something_that_uses_abc<T: PartialContext<PartialTest, Test>>(test: T) -> i64 {
        test.partial().abc
    }

    #[test]
    fn test_abstracted() {
        let parts = PartialTest::new(1);
        let whole = Test { abc: 1, def: 2 };

        assert_eq!(something_that_uses_abc(parts.clone()), 1);
        assert_eq!(something_that_uses_abc(whole.clone()), 1);

        let fin = parts.with_context(2);
        assert_eq!(whole, fin);
    }

    #[test]
    fn test_needs_context() {
        let t = PartialTest::new(2);
        let y = t.with_context(4);

        assert_eq!(y, Test { abc: 2, def: 4 });
    }

    #[derive(PartialContext, PartialEq, Debug)]
    struct TestMultiple {
        #[context]
        pub abc: i64,
        #[context]
        pub def: usize,

        pub g: bool,
    }

    #[test]
    fn test_always_g() {
        let parts = PartialTestMultiple::new(true);
        let whole = parts.with_context(2, 3);

        assert_eq!(
            whole,
            TestMultiple {
                abc: 2,
                def: 3,
                g: true
            }
        )
    }

    #[derive(PartialContext, PartialEq, Debug)]
    #[partial(name = "PartialCustom")]
    struct CustomName {
        pub abc: bool,
        #[context]
        pub def: i64,
    }

    #[test]
    fn test_custom() {
        let base = PartialCustom::new(true);
        let built = base.with_context(2);
        assert_eq!(built, CustomName { abc: true, def: 2 })
    }
}