How to mock remote REST API in unit test with Spring?

Question

Assume I have made a simple client in my application that uses a remote web service that is exposing a RESTful API at some URI /foo/bar/{baz}. Now I wish to uni

Answer 1

Best method is to use WireMock. Add the following dependencies:

    
        com.github.tomakehurst
        wiremock
        2.4.1
    
    
        org.igniterealtime.smack
        smack-core
        4.0.6
    

Define and use the wiremock as shown below

@Rule
public WireMockRule wireMockRule = new WireMockRule(8089);

String response ="Hello world";
StubMapping responseValid = stubFor(get(urlEqualTo(url)).withHeader("Content-Type", equalTo("application/json"))
            .willReturn(aResponse().withStatus(200)
                    .withHeader("Content-Type", "application/json").withBody(response)));