Implement tests for BaseActivity

app/src/main/java/org/isoron/uhabits/activities/ActivityComponent.java

@@ -29,6 +29,8 @@ import dagger.*;
            dependencies = { AppComponent.class })
 public interface ActivityComponent
 {
+    BaseActivity getActivity();
+
     ColorPickerDialogFactory getColorPickerDialogFactory();
 
     ThemeSwitcher getThemeSwitcher();

app/src/main/java/org/isoron/uhabits/activities/BaseActivity.java

@@ -26,11 +26,9 @@ import android.support.v7.app.*;
 import android.view.*;
 
 import org.isoron.uhabits.*;
-import org.isoron.uhabits.activities.habits.list.*;
-import org.isoron.uhabits.models.*;
-import org.isoron.uhabits.models.sqlite.*;
 
-import static android.R.anim.*;
+import static android.R.anim.fade_in;
+import static android.R.anim.fade_out;
 
 /**
  * Base class for all activities in the application.
@@ -41,18 +39,16 @@ import static android.R.anim.*;
  * {@link BaseScreen}.
  * <p>
  * A BaseActivity also installs an {@link java.lang.Thread.UncaughtExceptionHandler}
- * to the main thread that logs the exception to the disk before the application
- * crashes.
+ * to the main thread. By default, this handler is an instance of
+ * BaseExceptionHandler, which logs the exception to the disk before the application
+ * crashes. To the default handler, you should override the method
+ * getExceptionHandler.
  */
 abstract public class BaseActivity extends AppCompatActivity
-    implements Thread.UncaughtExceptionHandler
 {
     @Nullable
     private BaseMenu baseMenu;
 
-    @Nullable
-    private Thread.UncaughtExceptionHandler androidExceptionHandler;
-
     @Nullable
     private BaseScreen screen;
 
@@ -80,13 +76,13 @@ abstract public class BaseActivity extends AppCompatActivity
         return baseMenu.onItemSelected(item);
     }
 
-    public void restartWithFade()
+    public void restartWithFade(Class<?> cls)
     {
-        new Handler().postDelayed(() -> {
-            Intent intent = new Intent(this, ListHabitsActivity.class);
+        new Handler().postDelayed(() ->
+        {
             finish();
             overridePendingTransition(fade_in, fade_out);
-            startActivity(intent);
+            startActivity(new Intent(this, cls));
 
         }, 500); // HACK: Let the menu disappear first
     }
@@ -111,35 +107,6 @@ abstract public class BaseActivity extends AppCompatActivity
         dialog.show();
     }
 
-    @Override
-    public void uncaughtException(@Nullable Thread thread,
-                                  @Nullable Throwable ex)
-    {
-        if (ex == null) return;
-
-        try
-        {
-            ex.printStackTrace();
-            new BaseSystem(this).dumpBugReportToFile();
-        }
-        catch (Exception e)
-        {
-            // ignored
-        }
-
-        if (ex.getCause() instanceof InconsistentDatabaseException)
-        {
-            HabitsApplication app = (HabitsApplication) getApplication();
-            HabitList habits = app.getComponent().getHabitList();
-            habits.repair();
-            System.exit(0);
-        }
-
-        if (androidExceptionHandler != null)
-            androidExceptionHandler.uncaughtException(thread, ex);
-        else System.exit(1);
-    }
-
     @Override
     protected void onActivityResult(int request, int result, Intent data)
     {
@@ -151,9 +118,7 @@ abstract public class BaseActivity extends AppCompatActivity
     protected void onCreate(Bundle savedInstanceState)
     {
         super.onCreate(savedInstanceState);
-
-        androidExceptionHandler = Thread.getDefaultUncaughtExceptionHandler();
-        Thread.setDefaultUncaughtExceptionHandler(this);
+        Thread.setDefaultUncaughtExceptionHandler(getExceptionHandler());
 
         HabitsApplication app = (HabitsApplication) getApplicationContext();
 
@@ -165,4 +130,9 @@ abstract public class BaseActivity extends AppCompatActivity
 
         component.getThemeSwitcher().apply();
     }
+
+    protected Thread.UncaughtExceptionHandler getExceptionHandler()
+    {
+        return new BaseExceptionHandler(this);
+    }
 }

app/src/main/java/org/isoron/uhabits/activities/BaseExceptionHandler.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2017 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.activities;
+
+import android.support.annotation.*;
+
+import org.isoron.uhabits.*;
+import org.isoron.uhabits.models.*;
+import org.isoron.uhabits.models.sqlite.*;
+
+public class BaseExceptionHandler implements Thread.UncaughtExceptionHandler
+{
+    @Nullable
+    private Thread.UncaughtExceptionHandler originalHandler;
+
+    @NonNull
+    private BaseActivity activity;
+
+    public BaseExceptionHandler(@NonNull BaseActivity activity)
+    {
+        this.activity = activity;
+        originalHandler = Thread.getDefaultUncaughtExceptionHandler();
+    }
+
+    @Override
+    public void uncaughtException(@Nullable Thread thread,
+                                  @Nullable Throwable ex)
+    {
+        if (ex == null) return;
+
+        try
+        {
+            ex.printStackTrace();
+            new BaseSystem(activity).dumpBugReportToFile();
+        }
+        catch (Exception e)
+        {
+            e.printStackTrace();
+        }
+
+        if (ex.getCause() instanceof InconsistentDatabaseException)
+        {
+            HabitsApplication app = (HabitsApplication) activity.getApplication();
+            HabitList habits = app.getComponent().getHabitList();
+            habits.repair();
+            System.exit(0);
+        }
+
+        if (originalHandler != null)
+            originalHandler.uncaughtException(thread, ex);
+    }
+}

app/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsActivity.java

@@ -111,7 +111,7 @@ public class ListHabitsActivity extends BaseActivity
         if (prefs.getTheme() == ThemeSwitcher.THEME_DARK &&
             prefs.isPureBlackEnabled() != pureBlack)
         {
-            restartWithFade();
+            restartWithFade(ListHabitsActivity.class);
         }
 
         super.onResume();

app/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsScreen.java

@@ -353,7 +353,7 @@ public class ListHabitsScreen extends BaseScreen
     public void toggleNightMode()
     {
         themeSwitcher.toggleNightMode();
-        activity.restartWithFade();
+        activity.restartWithFade(ListHabitsActivity.class);
     }
 
     private void onOpenDocumentResult(int resultCode, Intent data)

app/src/test/java/org/isoron/uhabits/activities/BaseActivityTest.java

@@ -19,30 +19,116 @@
 
 package org.isoron.uhabits.activities;
 
+import android.content.*;
 import android.os.*;
+import android.support.v4.app.*;
+import android.support.v7.app.*;
 import android.support.v7.widget.Toolbar;
 import android.view.*;
 import android.widget.*;
 
 import org.isoron.uhabits.*;
+import org.isoron.uhabits.activities.common.dialogs.*;
 import org.junit.*;
 import org.junit.runner.*;
 import org.robolectric.*;
 import org.robolectric.annotation.*;
+import org.robolectric.shadows.*;
 
+import static org.hamcrest.core.IsEqual.*;
+import static org.junit.Assert.*;
 import static org.mockito.Mockito.*;
 import static org.robolectric.Robolectric.*;
+import static org.robolectric.Shadows.*;
 
 @RunWith(RobolectricTestRunner.class)
 @Config(constants = BuildConfig.class)
 public class BaseActivityTest
 {
+    private static boolean hasCrashed = false;
+
+    @Test
+    public void activityResultTest()
+    {
+        ScreenActivity activity = spy(setupActivity(ScreenActivity.class));
+        activity.onActivityResult(0, 0, null);
+        verify(activity.screen).onResult(0, 0, null);
+    }
+
+    @Test
+    public void componentTest()
+    {
+        EmptyActivity activity = setupActivity(EmptyActivity.class);
+        ActivityComponent component = activity.getComponent();
+        assertThat(component.getActivity(), equalTo(activity));
+    }
+
+    @Test
+    public void dialogFragmentTest()
+    {
+        EmptyActivity activity = setupActivity(EmptyActivity.class);
+        FragmentManager manager = activity.getSupportFragmentManager();
+        ColorPickerDialog d = new ColorPickerDialogFactory(activity).create(0);
+
+        activity.showDialog(d, "picker");
+        assertTrue(d.getDialog().isShowing());
+        assertThat(d, equalTo(manager.findFragmentByTag("picker")));
+    }
+
+    @Test
+    public void dialogTest()
+    {
+        EmptyActivity activity = setupActivity(EmptyActivity.class);
+        AlertDialog dialog =
+            new AlertDialog.Builder(activity).setTitle("Hello world").create();
+
+        activity.showDialog(dialog);
+        assertTrue(dialog.isShowing());
+    }
+
+    @Test
+    public void restartTest() throws Exception
+    {
+        EmptyActivity activity = setupActivity(EmptyActivity.class);
+
+        activity.restartWithFade(EmptyActivity.class);
+        ShadowLooper.runUiThreadTasksIncludingDelayedTasks();
+
+        Intent nextStartedActivity = shadowOf(activity).getNextStartedActivity();
+        assertNotNull(nextStartedActivity);
+
+        assertTrue(activity.isFinishing());
+        assertThat(shadowOf(nextStartedActivity).getIntentClass(),
+            equalTo(EmptyActivity.class));
+    }
+
+    @Test
+    public void exceptionHandlerTest() throws InterruptedException
+    {
+        assertFalse(hasCrashed);
+
+        Thread crashThread = new Thread()
+        {
+            @Override
+            public void run()
+            {
+                Looper.prepare();
+                CrashActivity activity = setupActivity(CrashActivity.class);
+                activity.crash();
+            }
+        };
+
+        crashThread.start();
+        crashThread.join();
+        assertTrue(hasCrashed);
+    }
+
     @Test
     public void menuTest()
     {
         MenuActivity activity = setupActivity(MenuActivity.class);
-        verify(activity.baseMenu).onCreate(
-            eq(activity.getMenuInflater()), any());
+        verify(activity.baseMenu).onCreate(eq(activity.getMenuInflater()),
+            any());
 
         Menu menu = activity.toolbar.getMenu();
         MenuItem item = menu.getItem(0);
@@ -50,7 +136,26 @@ public class BaseActivityTest
         verify(activity.baseMenu).onItemSelected(item);
     }
 
-    public static class MenuActivity extends BaseActivity
+    static class CrashActivity extends BaseActivity
+    {
+        public void crash()
+        {
+            throw new RuntimeException("crash!");
+        }
+
+        @Override
+        protected Thread.UncaughtExceptionHandler getExceptionHandler()
+        {
+            return (t, e) -> hasCrashed = true;
+        }
+    }
+
+    static class EmptyActivity extends BaseActivity
+    {
+
+    }
+
+    static class MenuActivity extends BaseActivity
     {
         public BaseMenu baseMenu;
 
@@ -78,4 +183,17 @@ public class BaseActivityTest
             setBaseMenu(baseMenu);
         }
     }
+
+    static class ScreenActivity extends BaseActivity
+    {
+        private BaseScreen screen;
+
+        @Override
+        protected void onCreate(Bundle savedInstanceState)
+        {
+            super.onCreate(savedInstanceState);
+            screen = spy(new BaseScreen(this));
+            setScreen(screen);
+        }
+    }
 }

app/src/test/java/org/isoron/uhabits/activities/habits/list/ListHabitsScreenTest.java

@@ -282,6 +282,6 @@ public class ListHabitsScreenTest extends BaseUnitTest
     {
         screen.toggleNightMode();
         verify(themeSwitcher).toggleNightMode();
-        verify(activity).restartWithFade();
+        verify(activity).restartWithFade(ListHabitsActivity.class);
     }
 }