feat:[kakao-tech-campus-2nd-step3#24]- add jwtTestUtils

토큰 테스트를 위한 별도의 유틸 클래스 생성

src/test/java/com/helpmeCookies/e2e/JwtTestUtils.java

@@ -0,0 +1,23 @@
+package com.helpmeCookies.e2e;
+
+import java.util.List;
+
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+
+import com.helpmeCookies.global.jwt.JwtProvider;
+import com.helpmeCookies.global.jwt.JwtToken;
+import com.helpmeCookies.global.jwt.JwtUser;
+
+
+public class JwtTestUtils {
+
+	public static JwtToken generateValidToken(JwtProvider jwtProvider, Long userId, String username, String role) {
+		JwtUser jwtUser = JwtUser.builder()
+			.id(userId)
+			.username(username)
+			.authorities(List.of(new SimpleGrantedAuthority("ROLE_" + role)))
+			.build();
+
+		return jwtProvider.createToken(jwtUser);
+	}
+}