Writing Tests For Classes Using the WebClient

Pragya Keshap answered on February 24, 2023 Popularity 1/10 Helpfulness 1/10

answer Writing Tests For Classes Using the WebClient

Writing Tests For Classes Using the WebClient

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When it comes to writing unit tests for API clients, mocking the entire WebClient interaction with Mockito is usually not a good fit. A better approach is to start a local HTTP server and mock the HTTP responses from the remote system:

class SimpleApiClientTest {

  private MockWebServer mockWebServer;
  private SimpleApiClient cut; // Class Under Test

  @BeforeEach
  void setup() throws IOException {
    this.mockWebServer = new MockWebServer();
    this.mockWebServer.start();
    this.cut = new SimpleApiClient(WebClient
      .builder()
      .baseUrl(mockWebServer.url("/").toString())
      .build());
  }

  @Test
  void testGetUserById() throws InterruptedException {
    MockResponse mockResponse = new MockResponse()
      .addHeader("Content-Type", "application/json; charset=utf-8")
      .setBody("{\"id\": 1, \"name\":\"write good tests\"}");

    mockWebServer.enqueue(mockResponse);

    JsonNode result = cut.getTodoFromAPI();

    assertEquals(1, result.get("id").asInt());
    assertEquals("write good tests", result.get("name").asText());

    RecordedRequest request = mockWebServer.takeRequest();
    assertEquals("/todos/1", request.getPath());
  }
}

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java using web-client

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Contributed on Feb 24 2023

Pragya Keshap

0 Answers Avg Quality 2/10

Writing Tests For Classes Using the WebClient

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