java - 使用注入(inject) java 和 spring boot 的 RestTemplate 类进行单元测试

Question

我正在使用一个已注入(inject) RestTemplate 的类运行单元测试，并且仅当我运行测试时，RestTemplate 在使用我正在使用的 API 后才会获取 null。

class ReceitaWsIntegrationImpl implements ReceitaWsIntegration {

  private static final String URL_RECEITA_WS_CNPJ
    = "https://www.receitaws.com.br/v1/cnpj";

  private final RestTemplate restTemplate;

  @Override
  public void findByCnpj(String cnpj) {
    ResponseEntity<CnpjResource> forEntity = restTemplate.getForEntity(
      URL_RECEITA_WS_CNPJ.concat("/").concat(cnpj), CnpjResource.class);
  }
}

测试类:

public class ReceitaWsIntegrationImplTest extends TestSupport {

private static final String CNPJ = "27865757000102";
private static final String URL_RECEITA_WS_CNPJ = "https://www.receitaws.com.br/v1/cnpj/";
@Mock
private RestTemplate restTemplate;
private ReceitaWsIntegration receitaWsIntegration;

    @Override
    public void init() {
        receitaWsIntegration = new ReceitaWsIntegrationImpl(restTemplate);
    }

    @Test
    public void should_find_company_by_cnpj() {
        receitaWsIntegration.findByCnpj(CNPJ);

        InOrder inOrder = inOrder(restTemplate);

        inOrder.verify(restTemplate, times(1))
            .getForEntity(URL_RECEITA_WS_CNPJ.concat(CNPJ), CnpjResource.class);
        inOrder.verifyNoMoreInteractions();
    }
}

Answer 1

看起来您的测试没有创建 RestTemplate 对象，因为没有处理注释 @Mock 的代码。创建模拟有不同的方法。例如。您可以在 init 方法中初始化模拟。

@Override
public void init() {
    MockitoAnnotations.initMocks(this);
    receitaWsIntegration = new ReceitaWsIntegrationImpl(restTemplate);
}

有关更多选项，请查看Mockito's Javadoc .