add tests for PasswordEncryptionService

commafeed-server/src/test/java/com/commafeed/backend/service/PasswordEncryptionServiceTest.java

@@ -0,0 +1,23 @@
+package com.commafeed.backend.service;
+
+import java.util.HexFormat;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+class PasswordEncryptionServiceTest {
+
+	@Test
+	void authenticate() {
+		String password = "password";
+		byte[] salt = "abcdefgh".getBytes();
+
+		PasswordEncryptionService passwordEncryptionService = new PasswordEncryptionService();
+		byte[] encryptedPassword = passwordEncryptionService.getEncryptedPassword(password, salt);
+
+		// make sure the encrypted password is always the same for a fixed salt
+		Assertions.assertEquals("8b4660158141d9f4f7865718b9a2b940a3e3cea9", HexFormat.of().formatHex(encryptedPassword));
+		Assertions.assertTrue(passwordEncryptionService.authenticate(password, encryptedPassword, salt));
+	}
+
+}