模拟服务器请求Android Espresso UI测试

问题描述

我正在使用Espresso为我的Android应用程序编写UI测试，并想使用MockWebServer模拟HTTP请求.在运行测试之前，我需要模拟身份验证响应并登录用户.

I am using Espresso to write UI tests for my Android application and would like to mock http requests using MockWebServer.I need to mock authentication responses and sign in the user before the tests are run.

有没有一种方法可以使该应用程序使用模拟网络服务器，以便发出实际的请求，所以我可以使用在模拟网络服务器上排队的响应.

Is there a way make the app use mockwebserver so that isntead of making actual requests, I can use respontes enqueued on mockwebserver.

到目前为止，我有:

public class AuthenticationTest {

@Rule
public ActivityTestRule<Authentication> mActivityTestRule = new ActivityTestRule<>(Authentication.class);

private  Authentication activity;
private MockWebServer server;

@Before
public void signin() throws Exception {
    server = new MockWebServer();
    server.start();
    activity = mActivityTestRule.getActivity();
    MyApplication.State state = activity.getState();

    String serverUrl = server.url("/").toString();

    // Here is where I have a problem. How to force client to use mock server?

}

@Test
public void firstTest() {
    String contentType = "Content-type: application/json";
    MockResponse r1 = new MockResponse().setResponseCode(200).setBody("example_body").addHeader(contentType);
    server.enqueue(r1);

    // typing credentials and pressing "Sign in" button, which should use mocked server's response:

    ViewInteraction email = onView(allOf(withId(R.id.emailAddress), isDisplayed()));
    email.perform(replaceText("[email protected]"), closeSoftKeyboard());
    ViewInteraction password = onView(allOf(withId(R.id.password), isDisplayed()));
    password.perform(replaceText("some_password"), closeSoftKeyboard());
    ViewInteraction signin = onView(allOf(withId(R.id.signInButton), withText("Sign In"), isDisplayed()));
    button2.perform(click());
}

推荐答案

此示例将依赖关系替换为Dagger.但是您可以使用任何其他方法进行DI.主要思想-通过自定义测试运行器提供应用程序的测试"版本来替换测试过程中的依赖关系.

This example of replacing dependency with Dagger. But you can use any other approaches for DI. Main idea - replace dependency during test by providing a "test" version of you application via custom test runner.

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