vendor/handlebars-3.5.5/src/helpers/helper_boolean.rs

   1 //! Helpers for boolean operations
   2
   3 use crate::json::value::JsonTruthy;
   4
   5 handlebars_helper!(eq: |x: Json, y: Json| x == y);
   6 handlebars_helper!(ne: |x: Json, y: Json| x != y);
   7 handlebars_helper!(gt: |x: i64, y: i64| x > y);
   8 handlebars_helper!(gte: |x: i64, y: i64| x >= y);
   9 handlebars_helper!(lt: |x: i64, y: i64| x < y);
  10 handlebars_helper!(lte: |x: i64, y: i64| x <= y);
  11 handlebars_helper!(and: |x: Json, y: Json| x.is_truthy(false) && y.is_truthy(false));
  12 handlebars_helper!(or: |x: Json, y: Json| x.is_truthy(false) || y.is_truthy(false));
  13 handlebars_helper!(not: |x: Json| !x.is_truthy(false));
  14
  15 #[cfg(test)]
  16 mod test_conditions {
  17     fn test_condition(condition: &str, expected: bool) {
  18         let handlebars = crate::Handlebars::new();
  19
  20         let result = handlebars
  21             .render_template(
  22                 &format!(
  23                     "{{{{#if {condition}}}}}lorem{{{{else}}}}ipsum{{{{/if}}}}",
  24                     condition = condition
  25                 ),
  26                 &json!({}),
  27             )
  28             .unwrap();
  29         assert_eq!(&result, if expected { "lorem" } else { "ipsum" });
  30     }
  31
  32     #[test]
  33     fn foo() {
  34         test_condition("(gt 5 3)", true);
  35         test_condition("(gt 3 5)", false);
  36         test_condition("(or (gt 3 5) (gt 5 3))", true);
  37         test_condition("(not [])", true);
  38         test_condition("(and null 4)", false);
  39     }
  40
  41     #[test]
  42     fn test_eq() {
  43         test_condition("(eq 5 5)", true);
  44         test_condition("(eq 5 6)", false);
  45         test_condition(r#"(eq "foo" "foo")"#, true);
  46         test_condition(r#"(eq "foo" "Foo")"#, false);
  47         test_condition(r#"(eq [5] [5])"#, true);
  48         test_condition(r#"(eq [5] [4])"#, false);
  49         test_condition(r#"(eq 5 "5")"#, false);
  50         test_condition(r#"(eq 5 [5])"#, false);
  51     }
  52
  53     #[test]
  54     fn test_ne() {
  55         test_condition("(ne 5 6)", true);
  56         test_condition("(ne 5 5)", false);
  57         test_condition(r#"(ne "foo" "foo")"#, false);
  58         test_condition(r#"(ne "foo" "Foo")"#, true);
  59     }
  60
  61     #[test]
  62     fn nested_conditions() {
  63         let handlebars = crate::Handlebars::new();
  64
  65         let result = handlebars
  66             .render_template("{{#if (gt 5 3)}}lorem{{else}}ipsum{{/if}}", &json!({}))
  67             .unwrap();
  68         assert_eq!(&result, "lorem");
  69
  70         let result = handlebars
  71             .render_template(
  72                 "{{#if (not (gt 5 3))}}lorem{{else}}ipsum{{/if}}",
  73                 &json!({}),
  74             )
  75             .unwrap();
  76         assert_eq!(&result, "ipsum");
  77     }
  78 }