askama/testing/tests/extend.rs

use askama::Template;

#[test]
fn test_macro_in_block_inheritance() {
    #[derive(Template)]
    #[template(
        source = r#"{% extends "extend_and_import.html" %}
{%- import "macro.html" as m2 -%}

{%- macro another(param) -%}

--> {{ param }}

{%- endmacro -%}

{% block header -%}
{% call m1::twice(1) %}{% endcall %}
{% call m2::twice(2) %}{% endcall %}
{% call another(3) %}{% endcall %}
{%- endblock -%}
"#,
        ext = "txt"
    )]
    struct A;

    assert_eq!(A.render().unwrap(), "1 1\n2 2\n--> 3");
}

// This test ensures that comments are allowed before `extends` block.
#[test]
fn test_comment_before_extend() {
    #[derive(Template)]
    #[template(source = r##"{# comment #}{% extends "base.html" %}"##, ext = "txt")]
    pub struct X {
        title: &'static str,
    }
}

// This test ensures that template variables are correctly generated before the `extends`
// is processed. It also checks that expressions/literals are not rendered.
#[test]
fn test_variables_in_extends_blocks() {
    #[derive(Template)]
    #[template(
        source = r#"
{% extends "extend_and_import.html" %}

{{ 45 }}
yup

{% let x = 12 %}
{%- block header -%}
    {{ x }} + {{ y }}
{%- endblock -%}
{% let y = "hello" %}
"#,
        ext = "html"
    )]
    struct A;

    assert_eq!(A.render().unwrap(), "12 + hello");
}