Testing Http Request/response In Android

In my android application I'm using Sprint Rest Template for making API call to the webserver. But in test project where I test method for making requests with String ResT Template

Solution 1:

Yes, I'm doing something like the following:

In your build.gradle add the following:

androidTestCompile("org.springframework:spring-test:3.2.8.RELEASE") {
    exclude module: "spring-core"
}

You want the exclusion to avoid this exception

java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation

Then in your test do something like the following:

publicvoidtestService()throws Exception {
        RestTemplaterestTemplate=newRestTemplate();
        PeopleServicepeopleService=newPeopleService(restTemplate);

        MockRestServiceServermockServer= MockRestServiceServer.createServer(restTemplate);
        mockServer.expect(requestTo("http://localhost:3000/api/v1-DEV/people"))
                .andExpect(method(HttpMethod.GET))
                .andExpect(header("Authorization", "Bearer TEST_TOKEN"))
                .andRespond(withSuccess("JSON DATA HERE", MediaType.APPLICATION_JSON));

        Peoplepeople= peopleService.getPeople();

        mockServer.verify();

        assertThat(people).isNotNull();
        //Other assertions
}

Here is an example from Spring (http://docs.spring.io/spring/docs/3.2.7.RELEASE/javadoc-api/org/springframework/test/web/client/MockRestServiceServer.html):

RestTemplate restTemplate = new RestTemplate()
 MockRestServiceServer mockServer =MockRestServiceServer.createServer(restTemplate);

 mockServer.expect(requestTo("/hotels/42")).andExpect(method(HttpMethod.GET))
     .andRespond(withSuccess("{ \"id\" : \"42\", \"name\" : \"Holiday Inn\"}", MediaType.APPLICATION_JSON));

 Hotel hotel = restTemplate.getForObject("/hotels/{id}", Hotel.class, 42);
 // Use the hotel instance...

 mockServer.verify();

Another way to do it is by using Mockito. Include the following in your build.gradle:

androidTestCompile "com.google.dexmaker:dexmaker:1.0"
androidTestCompile "com.google.dexmaker:dexmaker-mockito:1.0"
androidTestCompile "org.mockito:mockito-core:1.9.5"

You'll need each of the above to use Mockito properly.

Then in your test do the following:

publicclassTestClassextendsInstrumentationTestCase {
    @Mockprivate RestTemplate restTemplate;

    protectedvoidsetUp()throws Exception {
        super.setUp();

        initMocks(this);
    }

    publicvoidtestWithMockRestTemplate()throws Exception {
        HotelexpectedHotel=newHotel("Fake Hotel From Mocked Rest Template");
        when(restTemplate.getForObject("/hotels/{id}", Hotel.class, 42).thenReturn(expectedHotel);

        Hotelhotel= restTemplate.getForObject("/hotels/{id}", Hotel.class, 42);

        assertThat(hotel).isEqualTo(expectedHotel);

    }
}

Hope this helps!