我需要使用lambda Consumer测试使用另一个接口作为依赖项注入的calss.

@Builder
public class Interactor {

    private final Gateway gateway;

    void process(String message, Consumer<String> response){
        gateway.process(message, uuid -> {
            response.accept(uuid.toString());
        });
    }
}

依赖关系的定义如下：

public interface Gateway {

    void process(String message, Consumer<UUID> uuid);
}

我将如何模拟网关,以便为测试提供UUID值响应？

这是我到目前为止尝试过的：

@Test
void whillReturnTheInjectedUUIDValueTest() {

    UUID uuid = UUID.randomUUID();

    Gateway gateway = Mockito.mock(Gateway.class);
    Mockito.when(gateway.process("ignored", uuid1 -> {return uuid;}));

    Interactor.builder().gateway(gateway).build().process("ignored", s -> {
        Assertions.assertEquals(uuid.toString(), s);
    });
}

我应该如何向消费者提供退货价值？

解决方法:

现在,我最终在没有Mockito的情况下嘲笑了自己的内部类.

class InteractorTest {

    @Test
    void whillReturnTheInjectedUUIDValueTest() {

        UUID uuid = UUID.randomUUID();

        Gateway gateway = GatewayMock.builder().value(uuid).build();

        Interactor.builder().gateway(gateway).build().process("ignored", s -> {
            Assertions.assertEquals(uuid.toString(), s);
        });
    }

    @Builder
    private static class GatewayMock implements Gateway {

        private final UUID value;

        @Override
        public void process(String message, Consumer<UUID> uuid) {
            uuid.accept(value);
        }

    }
}