1 files changed, 11 insertions, 0 deletions
diff --git a/src/regex/RegexTest.java b/src/regex/RegexTest.java
index 8776c3f..d172034 100644
--- a/src/regex/RegexTest.java
+++ b/src/regex/RegexTest.java
@@ -65,8 +65,19 @@ public class RegexTest {
         System.out.println();
     }
     
+    static void checkNAT() {
+        RegexTest reNAT = new RegexTest("[0]|[1-9][0-9]*");
+        reNAT.assertOk("2");
+        reNAT.assertOk("14451");
+        reNAT.assertFail("Id");
+        reNAT.assertFail("-145711");
+        reNAT.assertFail("01");
+        System.out.println();
+    }
+
     public static void main(String[] args) {
         checkId();
+        checkNAT();
         System.out.println("Passed.");
     }
 }