Add unit test for NsecRdata constructor

Author: Litr0

src/message/rdata/nsec_rdata.rs

@@ -193,4 +193,17 @@ impl NsecRdata{
         // Set the bit in the bitmap
         bitmap[offset as usize] |= 1 << bit;
     }
+}
+
+#[cfg(test)]
+mod nsec_rdata_test{
+    use super::*;
+
+    #[test]
+    fn constructor_test() {
+        let nsec_rdata = NsecRdata::new(DomainName::new(), vec![]);
+
+        assert_eq!(nsec_rdata.next_domain_name.get_name(), String::from(""));
+        assert_eq!(nsec_rdata.type_bit_maps, vec![]);
+    }
 }