1 files changed, 112 insertions, 0 deletions
diff --git a/vendor/handlebars/src/helpers/helper_extras.rs b/vendor/handlebars/src/helpers/helper_extras.rs
new file mode 100644
index 000000000..fe8f7a7d3
--- /dev/null
+++ b/vendor/handlebars/src/helpers/helper_extras.rs
@@ -0,0 +1,112 @@
+//! Helpers for boolean operations
+use serde_json::Value as Json;
+
+use crate::json::value::JsonTruthy;
+
+handlebars_helper!(eq: |x: Json, y: Json| x == y);
+handlebars_helper!(ne: |x: Json, y: Json| x != y);
+handlebars_helper!(gt: |x: i64, y: i64| x > y);
+handlebars_helper!(gte: |x: i64, y: i64| x >= y);
+handlebars_helper!(lt: |x: i64, y: i64| x < y);
+handlebars_helper!(lte: |x: i64, y: i64| x <= y);
+handlebars_helper!(and: |x: Json, y: Json| x.is_truthy(false) && y.is_truthy(false));
+handlebars_helper!(or: |x: Json, y: Json| x.is_truthy(false) || y.is_truthy(false));
+handlebars_helper!(not: |x: Json| !x.is_truthy(false));
+handlebars_helper!(len: |x: Json| {
+    match x {
+        Json::Array(a) => a.len(),
+        Json::Object(m) => m.len(),
+        Json::String(s) => s.len(),
+        _ => 0
+    }
+});
+
+#[cfg(test)]
+mod test_conditions {
+    fn test_condition(condition: &str, expected: bool) {
+        let handlebars = crate::Handlebars::new();
+
+        let result = handlebars
+            .render_template(
+                &format!(
+                    "{{{{#if {condition}}}}}lorem{{{{else}}}}ipsum{{{{/if}}}}",
+                    condition = condition
+                ),
+                &json!({}),
+            )
+            .unwrap();
+        assert_eq!(&result, if expected { "lorem" } else { "ipsum" });
+    }
+
+    #[test]
+    fn foo() {
+        test_condition("(gt 5 3)", true);
+        test_condition("(gt 3 5)", false);
+        test_condition("(or (gt 3 5) (gt 5 3))", true);
+        test_condition("(not [])", true);
+        test_condition("(and null 4)", false);
+    }
+
+    #[test]
+    fn test_eq() {
+        test_condition("(eq 5 5)", true);
+        test_condition("(eq 5 6)", false);
+        test_condition(r#"(eq "foo" "foo")"#, true);
+        test_condition(r#"(eq "foo" "Foo")"#, false);
+        test_condition(r#"(eq [5] [5])"#, true);
+        test_condition(r#"(eq [5] [4])"#, false);
+        test_condition(r#"(eq 5 "5")"#, false);
+        test_condition(r#"(eq 5 [5])"#, false);
+    }
+
+    #[test]
+    fn test_ne() {
+        test_condition("(ne 5 6)", true);
+        test_condition("(ne 5 5)", false);
+        test_condition(r#"(ne "foo" "foo")"#, false);
+        test_condition(r#"(ne "foo" "Foo")"#, true);
+    }
+
+    #[test]
+    fn nested_conditions() {
+        let handlebars = crate::Handlebars::new();
+
+        let result = handlebars
+            .render_template("{{#if (gt 5 3)}}lorem{{else}}ipsum{{/if}}", &json!({}))
+            .unwrap();
+        assert_eq!(&result, "lorem");
+
+        let result = handlebars
+            .render_template(
+                "{{#if (not (gt 5 3))}}lorem{{else}}ipsum{{/if}}",
+                &json!({}),
+            )
+            .unwrap();
+        assert_eq!(&result, "ipsum");
+    }
+
+    #[test]
+    fn test_len() {
+        let handlebars = crate::Handlebars::new();
+
+        let result = handlebars
+            .render_template("{{len value}}", &json!({"value": [1,2,3]}))
+            .unwrap();
+        assert_eq!(&result, "3");
+
+        let result = handlebars
+            .render_template("{{len value}}", &json!({"value": {"a" :1, "b": 2}}))
+            .unwrap();
+        assert_eq!(&result, "2");
+
+        let result = handlebars
+            .render_template("{{len value}}", &json!({"value": "tomcat"}))
+            .unwrap();
+        assert_eq!(&result, "6");
+
+        let result = handlebars
+            .render_template("{{len value}}", &json!({"value": 3}))
+            .unwrap();
+        assert_eq!(&result, "0");
+    }
+}