askama/testing/tests/rust_macro.rs

use askama::Template;

macro_rules! hello {
    () => {
        "world"
    };
}

#[test]
fn macro_basic() {
    #[derive(Template)]
    #[template(path = "rust-macros.html")]
    struct RustMacrosTemplate {}

    let template = RustMacrosTemplate {};
    assert_eq!("Hello, world!", template.render().unwrap());
}

mod foo {
    macro_rules! hello2 {
        () => {
            "world"
        };
    }

    pub(crate) use hello2;
}

#[test]
fn macro_full_path() {
    #[derive(Template)]
    #[template(path = "rust-macros-full-path.html")]
    struct RustMacrosFullPathTemplate {}

    let template = RustMacrosFullPathTemplate {};
    assert_eq!("Hello, world!", template.render().unwrap());
}

macro_rules! call_a_or_b_on_tail {
    ((a: $a:expr, b: $b:expr, c: $c:expr), call a: $($tail:expr),*) => {
        ($a)($($tail),*)
    };

    ((a: $a:expr, b: $b:expr, c: $c:expr), call b: $($tail:expr),*) => {
        ($b)($($tail),*)
    };

    ((a: $a:expr, b: $b:expr, c: $c:expr), call c: $($tail:expr),*) => {
        ($c)($($tail),*)
    };
}

mod macro_with_args {
    use askama::Template;

    fn year(y: u16, _: &str, _: u8) -> u16 {
        y
    }

    fn month(_: u16, m: &str, _: u8) -> &str {
        m
    }

    fn day(_: u16, _: &str, d: u8) -> u8 {
        d
    }

    #[derive(Template)]
    #[template(path = "rust-macro-args.html")]
    struct RustMacrosArgTemplate {}

    #[test]
    fn macro_with_args() {
        let template = RustMacrosArgTemplate {};
        assert_eq!("2021\nJuly\n2", template.render().unwrap());
    }
}