implement string equality comparison & test

src/lib.rs

@@ -1,3 +1,4 @@
+#[macro_use]
 extern crate handlebars;
 use handlebars::{Context, Output, Handlebars, Helper, RenderContext, RenderError};
 
@@ -10,8 +11,11 @@ fn json_format_helper(helper: &Helper, _: &Handlebars, _: &Context, _: &mut Rend
     Ok(())
 }
 
+handlebars_helper!(eqs: |x: str, y: str| x == y);
+
 pub fn register(handle: &mut Handlebars) {
     handle.register_helper("JSONstringify", Box::new(json_format_helper));
+    handle.register_helper("eqs", Box::new(eqs));
 }
 
 #[cfg(test)]
@@ -24,11 +28,24 @@ mod tests {
         let mut handlebars = Handlebars::new();
         register(&mut handlebars);
 
-        println!("{:?}", handlebars.render_template("FOO: {{JSONstringify foo}}", &json!({
+        println!("{:?}", handlebars.render_template("{{JSONstringify foo}}", &json!({
             "foo": {
                 "bar": 1,
                 "baz": 2
             }
         })).unwrap());
     }
+
+    #[test]
+    fn test_eqs () {
+        let mut handlebars = Handlebars::new();
+        register(&mut handlebars);
+
+        assert_eq!(
+            handlebars.render_template("{{#if (eqs page \"login\")}}login{{/if}}", &json!({
+                "page": "login"
+            })).unwrap(),
+            "login"
+        );
+    }
 }