spring-boot-rest/spring-boot-modules/spring-boot-data/src/test/java/com/baeldung/jsonexception/MainControllerIntegrationTest.java

package com.baeldung.jsonexception;

import org.junit.Test;

import com.baeldung.jsonexception.CustomException;
import com.baeldung.jsonexception.MainController;

public class MainControllerIntegrationTest {

    @Test(expected = CustomException.class)
    public void givenIndex_thenCustomException() throws CustomException {

        MainController mainController = new MainController();

        mainController.index();

    }

}