import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import static org.mockito.Mockito.when;

public class MockitoDemo {
    static class ExampleService {
        public void hello() {
            System.out.println("Hello");
        }
    }

    @Mock
    private ExampleService exampleService;
    @Test
    public void helloCase1() {
        // 这句编译不通过，IDE 也会提示错误，原因很简单，when 的参数是非 void
        when(exampleService.hello()).thenThrow(new RuntimeException("异常"));
        

    }
}