Code commit for BAEL-4489 (#10790)

* Code commit for "Converting String to BigDecimal in Java" - Article

* modified the assert param for comparing actual and expected values

* removed the conflict change

* Code commit for Secret Key to String and vice versa in java

* renaming the junit class name to match coding standard

core-java-modules/core-java-security-2/src/test/java/com/baeldung/secretkeyandstringconversion/ConversionClassUtilUnitTest.java

@@ -0,0 +1,44 @@
+package com.baeldung.secretkeyandstringconversion;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.spec.InvalidKeySpecException;
+
+import javax.crypto.SecretKey;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class ConversionClassUtilUnitTest {
+
+	@Test
+	void givenPasswordAndSalt_whenCreateSecreKeyCheckConversion_thenSuccess()
+			throws NoSuchAlgorithmException, InvalidKeySpecException {
+		// given
+		String password = "Baeldung@2021";
+		String salt = "@$#baelDunG@#^$*";
+
+		// when
+		SecretKey encodedKey = ConversionClassUtil.getKeyFromPassword(password, salt);
+		String encodedString = ConversionClassUtil.convertSecretKeyToString(encodedKey);
+		SecretKey decodeKey = ConversionClassUtil.convertStringToSecretKeyto(encodedString);
+
+		// then
+		Assertions.assertEquals(encodedKey, decodeKey);
+	}
+
+	@Test
+	void givenSize_whenCreateSecreKeyCheckConversion_thenSuccess()
+			throws NoSuchAlgorithmException, InvalidKeySpecException {
+		// given
+		int size = 256;
+
+		// when
+		SecretKey encodedKey = ConversionClassUtil.generateKey(size);
+		String encodedString = ConversionClassUtil.convertSecretKeyToString(encodedKey);
+		SecretKey decodeKey = ConversionClassUtil.convertStringToSecretKeyto(encodedString);
+
+		// then
+		Assertions.assertEquals(encodedKey, decodeKey);
+	}
+
+}