@RestClientTests

Deepika Sahu answered on December 20, 2022 Popularity 1/10 Helpfulness 1/10

answer @RestClientTests

related RestClientTest

@RestClientTests

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First – the @RestClientTest annotation allows us to specify the exact service under test – in our case it is the DetailsServiceClient class.
This service will be loaded into the test context, while everything else is filtered out.

This allows us to autowire the DetailsServiceClient instance inside our test and leave everything else outside, which speeds up the loading of the context.

Second – as the MockRestServiceServer instance is also configured for a @RestClientTest-annotated test (and bound to the DetailsServiceClient instance for us), we can simply inject it and use.

Finally – JSON support for @RestClientTest allows us to inject the Jackson’s ObjectMapper instance to prepare the MockRestServiceServer’s mock answer value.

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Contributed on Dec 20 2022

Deepika Sahu

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package de.rieckpil.blog;

import org.hamcrest.Matchers;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.client.RestClientTest;
import org.springframework.http.MediaType;
import org.springframework.test.web.client.MockRestServiceServer;
import org.springframework.test.web.client.match.MockRestRequestMatchers;
import org.springframework.test.web.client.response.MockRestResponseCreators;

import static org.junit.jupiter.api.Assertions.assertEquals;

@RestClientTest(RandomQuoteClient.class)
class RandomQuoteClientTest {

  @Autowired
  private RandomQuoteClient randomQuoteClient;

  @Autowired
  private MockRestServiceServer mockRestServiceServer;

  @Test
  public void shouldReturnQuoteFromRemoteSystem() {
    String response = "{" +
      "\"contents\": {"+
        "\"quotes\": ["+
          "{"+
            "\"author\": \"duke\"," +
            "\"quote\": \"Lorem ipsum\""+
          "}"+
        "]"+
      "}" +
    "}";

    this.mockRestServiceServer
      .expect(MockRestRequestMatchers.requestTo("/qod"))
      .andRespond(MockRestResponseCreators.withSuccess(response, MediaType.APPLICATION_JSON));

    String result = randomQuoteClient.getRandomQuote();

    assertEquals("Lorem ipsum", result);
  }
}

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Contributed on Feb 24 2023

Pragya Keshap

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