handlebars 6.4.0

Handlebars templating implemented in Rust.
Documentation 
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extern crate handlebars;

#[macro_use]
extern crate serde_json;

use handlebars::{handlebars_helper, no_escape, Handlebars};

#[test]
fn test_escape_216() {
    let hbs = Handlebars::new();

    let data = json!({
        "FOO": "foo",
        "BAR": "bar"
    });

    assert_eq!(
        hbs.render_template(r"\\\\ {{FOO}} {{BAR}} {{FOO}}{{BAR}} {{FOO}}#{{BAR}} {{FOO}}//{{BAR}} {{FOO}}\\{{FOO}} {{FOO}}\\\\{{FOO}}\\\{{FOO}} \\\{{FOO}} \{{FOO}} \{{FOO}}", &data).unwrap(),
        r"\\\\ foo bar foobar foo#bar foo//bar foo\foo foo\\\foo\\foo \\foo {{FOO}} {{FOO}}"
    );
}

#[test]
fn test_string_no_escape_422() {
    let mut hbs = Handlebars::new();

    handlebars_helper!(replace: |input: str, from: str, to: str| {
        input.replace(from, to)
    });
    handlebars_helper!(echo: |input: str| {
        input
    });
    hbs.register_helper("replace", Box::new(replace));
    hbs.register_helper("echo", Box::new(echo));

    assert_eq!(
        r"some\ path",
        hbs.render_template(r#"{{replace "some/path" "/" "\\ " }}"#, &())
            .unwrap()
    );
    assert_eq!(
        r"some\ path",
        hbs.render_template(r"{{replace 'some/path' '/' '\\ ' }}", &())
            .unwrap()
    );

    assert_eq!(
        r"some\path",
        hbs.render_template(r#"{{replace "some/path" "/" "\\" }}"#, &())
            .unwrap()
    );
    assert_eq!(
        r"some\path",
        hbs.render_template(r"{{replace 'some/path' '/' '\\' }}", &())
            .unwrap()
    );

    assert_eq!(
        r"double-quoted \ 'with' "nesting"",
        hbs.render_template(r#"{{echo "double-quoted \\ 'with' \"nesting\""}}"#, &())
            .unwrap()
    );
    assert_eq!(
        r"single-quoted \ 'with' "nesting"",
        hbs.render_template(r#"{{echo 'single-quoted \\ \'with\' "nesting"'}}"#, &())
            .unwrap()
    );
}

#[test]
fn test_string_whitespace_467() {
    const TEMPLATE_UNQUOTED: &str = r"{{#each synonyms}}
    {{this.name}} => '{{this.sym}}',
    {{/each}}
";

    let mut hbs = Handlebars::new();
    hbs.register_escape_fn(no_escape);
    hbs.register_template_string("perl", TEMPLATE_UNQUOTED)
        .unwrap();

    let r = hbs
        .render("perl", &json!({"synonyms": [{"name": "lt", "sym": "<"}]}))
        .unwrap();
    assert_eq!("    lt => '<',\n", r);
}

#[test]
fn test_triple_bracket_expression_471() {
    let mut hbs = Handlebars::new();

    handlebars_helper!(replace: |input: str| {
        input.replace('\n', "<br/>")
    });
    hbs.register_helper("replace", Box::new(replace));

    assert_eq!(
        "some&lt;br/&gt;path",
        hbs.render_template("{{replace h}}", &json!({"h": "some\npath"}))
            .unwrap()
    );

    assert_eq!(
        "some<br/>path",
        hbs.render_template("{{{replace h}}}", &json!({"h": "some\npath"}))
            .unwrap()
    );
}

#[test]
fn test_trimmed_nonescaped_variable() {
    let mut handlebars = Handlebars::new();
    handlebars
        .register_partial("system", "system: {{~{system}~}}")
        .unwrap();

    let output = handlebars
        .render_template("{{>system system=\"hello\" prompt=\" world\"}}", &())
        .unwrap();

    assert_eq!(output, "system:hello");
}