java-tutorials/junit5/src/test/java/com/baeldung/ExceptionTest.java

package com.baeldung;

import org.junit.gen5.api.Test;

import java.util.ArrayList;

import static org.junit.gen5.api.Assertions.assertEquals;
import static org.junit.gen5.api.Assertions.expectThrows;

public class ExceptionTest {

    @Test
    void shouldThrowException() {
        Throwable exception = expectThrows(UnsupportedOperationException.class,
                () -> {throw new UnsupportedOperationException("Not supported");});
        assertEquals(exception.getMessage(), "Not supported");
    }
}