Add NavigationBaseActivityTest (#2633)

app/build.gradle

@@ -66,6 +66,7 @@ dependencies {
     // Android testing
     androidTestImplementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$KOTLIN_VERSION"
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.1.1'
     androidTestImplementation 'androidx.test:runner:1.1.1'
     androidTestImplementation 'androidx.test:rules:1.1.1'
     androidTestImplementation 'androidx.annotation:annotation:1.0.2'

app/src/androidTest/java/fr/free/nrw/commons/NavigationBaseActivityTest.java

@@ -0,0 +1,67 @@
+package fr.free.nrw.commons;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import androidx.test.espresso.contrib.DrawerActions;
+import androidx.test.espresso.contrib.NavigationViewActions;
+import androidx.test.filters.LargeTest;
+import androidx.test.rule.ActivityTestRule;
+import androidx.test.runner.AndroidJUnit4;
+
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+
+@LargeTest
+@RunWith(AndroidJUnit4.class)
+public class NavigationBaseActivityTest {
+    @Rule
+    public ActivityTestRule activityRule = new ActivityTestRule<>(AboutActivity.class);
+
+    /**
+     * Goes through all the activities in the app and checks we don't crash
+     * NB: This is not realistic if we're not logged in; we can access 'home', 'notifications', 'settings' and 'achievements' which we wouldn't otherwise be able to.
+     */
+    @Test
+    public void goThroughNavigationBaseActivityActivities() {
+        // Home
+        openNavigationDrawerAndNavigateTo(R.id.action_home);
+
+        // Explore
+        openNavigationDrawerAndNavigateTo(R.id.action_explore);
+
+        // Bookmarks
+        openNavigationDrawerAndNavigateTo(R.id.action_bookmarks);
+
+        // About
+        openNavigationDrawerAndNavigateTo(R.id.action_about);
+
+        // Settings
+        openNavigationDrawerAndNavigateTo(R.id.action_settings);
+
+        // Achievements
+        openNavigationDrawerAndNavigateTo(R.id.action_login);
+    }
+
+    /**
+     * Clicks 'Explore' in the navigation drawer twice, then clicks 'home'
+     * Testing to avoid regression of #2200
+     */
+    @Test
+    public void doubleNavigateToExploreThenReturnHome() {
+        // Explore
+        openNavigationDrawerAndNavigateTo(R.id.action_explore);
+
+        // Explore
+        openNavigationDrawerAndNavigateTo(R.id.action_explore);
+
+        // Home
+        openNavigationDrawerAndNavigateTo(R.id.action_home);
+    }
+
+    public void openNavigationDrawerAndNavigateTo(int menuItemId) {
+        onView(withId(R.id.drawer_layout)).perform(DrawerActions.open());
+        onView(withId(R.id.navigation_view)).perform(NavigationViewActions.navigateTo(menuItemId));
+    }
+}