bael-4604: add test class

core-java-modules/core-java-security-3/src/test/java/com/baeldung/hmac/HMACUtilUnitTest.java

@@ -0,0 +1,50 @@
+package com.baeldung.hmac;
+
+import org.junit.Test;
+
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+
+import static org.junit.Assert.assertEquals;
+
+public class HMACUtilUnitTest {
+
+    private static String hmacSHA256Value = "5b50d80c7dc7ae8bb1b1433cc0b99ecd2ac8397a555c6f75cb8a619ae35a0c35";
+    private static String hmacMD5Value = "621dc816b3bf670212e0c261dc9bcdb6";
+    private static String hmacSHA512Value = "b313a21908df55c9e322e3c65a4b0b7561ab1594ca806b3affbc0d769a1290c1922aa6622587bea3c0c4d871470a6d06f54dbd20dbda84250e2741eb01f08e33";
+
+    //given
+    String hmacSHA256Algorithm = "HmacSHA256";
+    String hmacSHA512Algorithm = "HmacSHA512";
+    String hmacMD5Algorithm = "HmacMD5";
+    String data = "baeldung";
+    String key = "123456";
+
+    @Test
+    public void givenDataAndKeyAndAlgorithm_whenHmacWithJava_thenSuccess()
+        throws NoSuchAlgorithmException, InvalidKeyException {
+        //when
+        String result = HMACUtil.hmacWithJava(hmacSHA256Algorithm, data, key);
+
+        //then
+        assertEquals(hmacSHA256Value, result);
+    }
+
+    @Test
+    public void givenDataAndKeyAndAlgorithm_whenHmacWithApacheCommons_thenSuccess() {
+        //when
+        String result = HMACUtil.hmacWithApacheCommons(hmacMD5Algorithm, data, key);
+
+        //then
+        assertEquals(hmacMD5Value, result);
+    }
+
+    @Test
+    public void givenDataAndKeyAndAlgorithm_whenHmacWithBouncyCastle_thenSuccess() {
+        //when
+        String result = HMACUtil.hmacWithBouncyCastle(hmacSHA512Algorithm, data, key);
+
+        //then
+        assertEquals(hmacSHA512Value, result);
+    }
+}