<What causes java.lang.IllegalStateException: Fail...

# stackoverflow

[user]

What causes java.lang.IllegalStateException: Failed to load ApplicationContext error?
I am new to spring boot, so I don't understand what caused the error mentioned above here since everything gives no warnings and is imported from official libraries
import org.junit.jupiter.api.Assertions
import org.junit.jupiter.api.Test
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest
import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager

import javax.sql.DataSource


@DataJpaTest...