rest模板的Mockito单元测试

import org.junit.Before;
import org.junit.Test;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

import static org.mockito.Mockito.*;

public class RestTemplateTest {

    @Mock
    private RestTemplate restTemplate;

    @InjectMocks
    private MyService myService;

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void testGetResource() {
        String url = "http://example.com/resource";
        String expectedResponse = "Hello, World!";
        ResponseEntity<String> responseEntity = ResponseEntity.ok(expectedResponse);

        when(restTemplate.exchange(eq(url), eq(HttpMethod.GET), any(), eq(String.class)))
                .thenReturn(responseEntity);

        String actualResponse = myService.getResource(url);

        verify(restTemplate, times(1)).exchange(eq(url), eq(HttpMethod.GET), any(), eq(String.class));
        assertEquals(expectedResponse, actualResponse);
    }
}