+ Test for qs_param behavior

Pretty simple and contains a special note about qs_param usage

json-api/src/http.rs

@@ -40,6 +40,7 @@ pub fn parse_query_string<'qs>(string: &'qs str)
 }
 
 // Pulls out Option<type> from a HashMap<&str, &str>
+// NOTE: If you need &str just use the hashmap directly
 #[macro_export]
 macro_rules! qs_param {
     ($obj:expr, $id:literal, $type:ty) => {
@@ -55,3 +56,23 @@ macro_rules! qs_param {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use std::collections::HashMap;
+
+    #[test]
+    fn validate_qs_param() {
+        let mut map: HashMap<&str, &str> = HashMap::new();
+        map.insert("key", "value");
+        map.insert("asdf", "123");
+        // It should be noted if you want &str values then just
+        // use the hashmap directly, since the macro is a bit clumsy with strings
+        // Thust the cast to a String not &str is required
+        assert_eq!(qs_param!(map, "key", String).is_some(), true);
+        assert_eq!(qs_param!(map, "not-there", String).is_some(), false);
+
+        assert_eq!(qs_param!(map, "asdf", u64).is_some(), true);
+        assert_eq!(qs_param!(map, "asdf", bool).is_some(), false);
+    }
+}