react-native-navigation/android/app/src/test/java/com/reactnativenavigation/layout/BottomTabsContainerTest.java

package com.reactnativenavigation.layout;

import android.app.Activity;
import android.view.View;

import com.reactnativenavigation.BaseTest;
import com.reactnativenavigation.layout.bottomtabs.BottomTabs;
import com.reactnativenavigation.layout.bottomtabs.BottomTabsLayout;
import com.reactnativenavigation.layout.bottomtabs.TooManyTabsException;

import org.junit.Before;
import org.junit.Test;
import org.robolectric.Robolectric;

import static org.assertj.core.api.Java6Assertions.assertThat;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

public class BottomTabsContainerTest extends BaseTest {

    private static final String TAB_NAME = "myTab";
    private static final String OTHER_TAB_NAME = "myOtherTab";

    private BottomTabs bottomTabs;
    private Activity activity;

    @Before
    public void setUp() throws Exception {
        bottomTabs = mock(BottomTabs.class);
        activity = Robolectric.buildActivity(Activity.class).get();
    }

    @Test
    public void addsTabToBottomTabs() throws Exception {
        ContainerStackLayout tabContent = new ContainerStackLayout(activity);

        BottomTabsLayout bottomTabsContainer = createBottomTabsContainer();
        bottomTabsContainer.addTabContent(TAB_NAME, tabContent);

        verify(bottomTabs).add(TAB_NAME);
    }

    @Test
    public void addsTabContentToLayout() throws Exception {
        ContainerStackLayout stackLayout = new ContainerStackLayout(activity);

        BottomTabsLayout bottomTabsContainer = createBottomTabsContainer();
        bottomTabsContainer.addTabContent(TAB_NAME, stackLayout);

        verify(bottomTabs).attach(bottomTabsContainer);
        TestUtils.assertViewChildren(bottomTabsContainer, stackLayout);
    }

    @Test
    public void addsTwoTabsContentToLayout() throws Exception {
        View tabContent = new ContainerStackLayout(activity);
        View otherTabContent = new ContainerStackLayout(activity);

        BottomTabsLayout bottomTabsContainer = createBottomTabsContainer();
        bottomTabsContainer.addTabContent(TAB_NAME, tabContent);
        bottomTabsContainer.addTabContent(OTHER_TAB_NAME, otherTabContent);

        TestUtils.assertViewChildren(bottomTabsContainer, tabContent, otherTabContent);
    }

    @Test(expected = TooManyTabsException.class)
    public void throwsExceptionWhenMoreThenFiveTabs() throws Exception {
        BottomTabsLayout bottomTabsContainer = createBottomTabsContainer();
        for (int i = 0; i < 6; i++) {
            ContainerStackLayout content = new ContainerStackLayout(activity);
            bottomTabsContainer.addTabContent("#" + i, content);
        }
    }

    @Test
    public void addFiveTabs() throws Exception {
        BottomTabsLayout bottomTabsContainer = createBottomTabsContainer();
        for (int i = 0; i < 5; i++) {
            ContainerStackLayout content = new ContainerStackLayout(activity);
            bottomTabsContainer.addTabContent("#" + i, content);
        }
    }

    @Test
    public void onlyFirstTabShouldBeVisible() throws Exception {
        ContainerStackLayout tabContent = new ContainerStackLayout(activity);
        ContainerStackLayout otherTabContent = new ContainerStackLayout(activity);

        BottomTabsLayout bottomTabsContainer = createBottomTabsContainer();
        bottomTabsContainer.addTabContent(TAB_NAME, tabContent);
        bottomTabsContainer.addTabContent(OTHER_TAB_NAME, otherTabContent);

        assertThat(tabContent.getVisibility()).isEqualTo(View.VISIBLE);
        assertThat(otherTabContent.getVisibility()).isEqualTo(View.GONE);
    }

    @Test
    public void listensToTabsSwitchingEvents() throws Exception {
        BottomTabsLayout bottomTabsContainer = createBottomTabsContainer();
        verify(bottomTabs).setSelectionListener(bottomTabsContainer);
    }

    @Test
    public void switchesBetweenFirstAndSecondTabs() throws Exception {
        ContainerStackLayout tabContent = new ContainerStackLayout(activity);
        ContainerStackLayout otherTabContent = new ContainerStackLayout(activity);

        BottomTabsLayout bottomTabsContainer = createBottomTabsContainer();
        bottomTabsContainer.addTabContent(TAB_NAME, tabContent);
        bottomTabsContainer.addTabContent(OTHER_TAB_NAME, otherTabContent);
        bottomTabsContainer.onTabSelected(1);

        assertThat(tabContent.getVisibility()).isEqualTo(View.GONE);
        assertThat(otherTabContent.getVisibility()).isEqualTo(View.VISIBLE);
    }

    @Test
    public void switchesBetweenSecondAndFirstTabs() throws Exception {
        ContainerStackLayout tabContent = new ContainerStackLayout(activity);
        ContainerStackLayout otherTabContent = new ContainerStackLayout(activity);

        BottomTabsLayout bottomTabsContainer = createBottomTabsContainer();
        bottomTabsContainer.addTabContent(TAB_NAME, tabContent);
        bottomTabsContainer.addTabContent(OTHER_TAB_NAME, otherTabContent);
        bottomTabsContainer.onTabSelected(1);
        bottomTabsContainer.onTabSelected(0);

        assertThat(tabContent.getVisibility()).isEqualTo(View.VISIBLE);
        assertThat(otherTabContent.getVisibility()).isEqualTo(View.GONE);
    }

    private BottomTabsLayout createBottomTabsContainer() {
        return new BottomTabsLayout(activity, bottomTabs);
    }
}