ItemsTest.java

package com.artemzin.qualitymatters.functional_tests.tests;

import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;
import android.support.annotation.NonNull;

import com.artemzin.qualitymatters.R;
import com.artemzin.qualitymatters.functional_tests.TestUtils;
import com.artemzin.qualitymatters.functional_tests.rules.AsyncJobsObserverRule;
import com.artemzin.qualitymatters.functional_tests.rules.MockWebServerRule;
import com.artemzin.qualitymatters.functional_tests.rules.NeedsMockWebServer;
import com.artemzin.qualitymatters.functional_tests.screens.ItemsScreen;
import com.artemzin.qualitymatters.ui.activities.MainActivity;

import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.RuleChain;
import org.junit.runner.RunWith;

import okhttp3.mockwebserver.MockResponse;
import okhttp3.mockwebserver.MockWebServer;

@RunWith(AndroidJUnit4.class)
public class ItemsTest {

    @Rule
    public RuleChain rules = RuleChain.emptyRuleChain()
            .around(new MockWebServerRule(this))
            .around(new AsyncJobsObserverRule())
            .around(new ActivityTestRule<>(MainActivity.class));

    private ItemsScreen itemsScreen;

    @Before
    public void beforeEachTest() {
        itemsScreen = new ItemsScreen();
    }

    @Test // For real, it's really easy to break Toolbar, so why not test it?
    public void shouldDisplayTitle() {
        itemsScreen.shouldDisplayTitle(TestUtils.app().getString(R.string.app_name));
    }

    /**
     * @see #shouldDisplayAllItemsFromSuccessfulResponse_setupMockWebServer(MockWebServer)
     */
    @Test
    @NeedsMockWebServer(setupMethod = "shouldDisplayAllItemsFromSuccessfulResponse_setupMockWebServer")
    public void shouldDisplayAllItemsFromSuccessfulResponse() {
        itemsScreen.shouldDisplayExpectedAmountOfItems(8);

        for (int i = 1; i < 9; i++) {
            itemsScreen
                    .shouldDisplayItemWithTitle("Test title " + i)
                    .shouldDisplayItemWithShortDescription("Short desc " + i);
        }
    }

    /**
     * @see #shouldDisplayAllItemsFromSuccessfulResponse()
     */
    public void shouldDisplayAllItemsFromSuccessfulResponse_setupMockWebServer(@NonNull MockWebServer mockWebServer) {
        mockWebServer.enqueue(new MockResponse().setBody("["
                + "{ \"id\": \"test_id_1\", \"image_preview_url\": \"https://url1\", \"title\": \"Test title 1\", \"short_description\": \"Short desc 1\"},"
                + "{ \"id\": \"test_id_2\", \"image_preview_url\": \"https://url2\", \"title\": \"Test title 2\", \"short_description\": \"Short desc 2\"},"
                + "{ \"id\": \"test_id_3\", \"image_preview_url\": \"https://url3\", \"title\": \"Test title 3\", \"short_description\": \"Short desc 3\"},"
                + "{ \"id\": \"test_id_4\", \"image_preview_url\": \"https://url4\", \"title\": \"Test title 4\", \"short_description\": \"Short desc 4\"},"
                + "{ \"id\": \"test_id_5\", \"image_preview_url\": \"https://url5\", \"title\": \"Test title 5\", \"short_description\": \"Short desc 5\"},"
                + "{ \"id\": \"test_id_6\", \"image_preview_url\": \"https://url6\", \"title\": \"Test title 6\", \"short_description\": \"Short desc 6\"},"
                + "{ \"id\": \"test_id_7\", \"image_preview_url\": \"https://url7\", \"title\": \"Test title 7\", \"short_description\": \"Short desc 7\"},"
                + "{ \"id\": \"test_id_8\", \"image_preview_url\": \"https://url8\", \"title\": \"Test title 8\", \"short_description\": \"Short desc 8\"}"
                + "]"));
    }

    /**
     * @see #shouldDisplayErrorUiFrom500Response_setupMockWebServer(MockWebServer)
     */
    @Test
    @NeedsMockWebServer(setupMethod = "shouldDisplayErrorUiFrom500Response_setupMockWebServer")
    public void shouldDisplayErrorUiFrom500Response() {
        itemsScreen
                .shouldDisplayErrorText()
                .shouldDisplayTryAgainButton()
                .shouldNotDisplayItems();
    }

    /**
     * @see #shouldDisplayErrorUiFrom500Response()
     */
    public void shouldDisplayErrorUiFrom500Response_setupMockWebServer(@NonNull MockWebServer mockWebServer) {
        mockWebServer.enqueue(new MockResponse().setStatus("HTTP/1.1 500 Not today"));
    }

    @Test
    @NeedsMockWebServer(setupMethod = "shouldDisplayErrorUiThenReloadResultSuccessfully_setupMockWebServer")
    public void shouldDisplayErrorUiThenReloadResultSuccessfully() {
        itemsScreen
                .shouldDisplayErrorText()
                .shouldDisplayTryAgainButton()
                .shouldNotDisplayItems()
                .clickOnTryAgainButton()
                .shouldDisplayExpectedAmountOfItems(3)
                .shouldDisplayItemWithTitle("Loaded successfully 1")
                .shouldDisplayItemWithShortDescription("Short success desc 1")
                .shouldDisplayItemWithTitle("Loaded successfully 2")
                .shouldDisplayItemWithShortDescription("Short success desc 2")
                .shouldDisplayItemWithTitle("Loaded successfully 3")
                .shouldDisplayItemWithShortDescription("Short success desc 3");
    }

    public void shouldDisplayErrorUiThenReloadResultSuccessfully_setupMockWebServer(@NonNull MockWebServer mockWebServer) {
        mockWebServer.enqueue(new MockResponse().setStatus("HTTP/1.1 500 Wanna try again?"));
        mockWebServer.enqueue(new MockResponse().setBody("["
                + "{ \"id\": \"test_id_1\", \"image_preview_url\": \"https://url1\", \"title\": \"Loaded successfully 1\", \"short_description\": \"Short success desc 1\"},"
                + "{ \"id\": \"test_id_2\", \"image_preview_url\": \"https://url2\", \"title\": \"Loaded successfully 2\", \"short_description\": \"Short success desc 2\"},"
                + "{ \"id\": \"test_id_3\", \"image_preview_url\": \"https://url3\", \"title\": \"Loaded successfully 3\", \"short_description\": \"Short success desc 3\"}"
                + "]"));
    }
}