Refactor and write tests for IO tasks

app/src/androidTest/java/org/isoron/uhabits/unit/io/ImportTest.java

@@ -52,17 +52,13 @@ public class ImportTest
 {
     private File baseDir;
     private Context context;
-    private Context targetContext;
 
     @Before
     public void setup()
     {
         HabitFixtures.purgeHabits();
-
         context = InstrumentationRegistry.getInstrumentation().getContext();
-        targetContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
-
-        baseDir = DatabaseHelper.getFilesDir(targetContext, "Backups");
+        baseDir = DatabaseHelper.getFilesDir("Backups");
         if(baseDir == null) fail("baseDir should not be null");
     }
 

app/src/androidTest/java/org/isoron/uhabits/unit/tasks/ExportCSVTaskTest.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2016 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.unit.tasks;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+import android.test.suitebuilder.annotation.SmallTest;
+import android.widget.ProgressBar;
+
+import org.isoron.uhabits.models.Habit;
+import org.isoron.uhabits.tasks.ExportCSVTask;
+import org.isoron.uhabits.unit.models.HabitFixtures;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.File;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import static junit.framework.Assert.assertTrue;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.nullValue;
+import static org.hamcrest.core.IsNot.not;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class ExportCSVTaskTest
+{
+    @Test
+    public void exportCSV() throws InterruptedException
+    {
+        Context context = InstrumentationRegistry.getContext();
+        final CountDownLatch latch = new CountDownLatch(1);
+
+        HabitFixtures.createNonDailyHabit();
+        List<Habit> habits = Habit.getAll(true);
+        ProgressBar bar = new ProgressBar(context);
+
+        ExportCSVTask task = new ExportCSVTask(habits, bar);
+        task.setListener(new ExportCSVTask.Listener()
+        {
+            @Override
+            public void onExportCSVFinished(String archiveFilename)
+            {
+                assertThat(archiveFilename, is(not(nullValue())));
+
+                File f = new File(archiveFilename);
+                assertTrue(f.exists());
+                assertTrue(f.canRead());
+                latch.countDown();
+            }
+        });
+
+        task.execute();
+        latch.await(30, TimeUnit.SECONDS);
+    }
+}

app/src/androidTest/java/org/isoron/uhabits/unit/tasks/ExportDBTaskTest.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2016 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.unit.tasks;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+import android.test.suitebuilder.annotation.SmallTest;
+import android.widget.ProgressBar;
+
+import org.isoron.uhabits.tasks.ExportDBTask;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.File;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import static junit.framework.Assert.assertTrue;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.nullValue;
+import static org.hamcrest.core.IsNot.not;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class ExportDBTaskTest
+{
+    @Test
+    public void exportCSV() throws InterruptedException
+    {
+        Context context = InstrumentationRegistry.getContext();
+        final CountDownLatch latch = new CountDownLatch(1);
+
+        ProgressBar bar = new ProgressBar(context);
+        ExportDBTask task = new ExportDBTask(bar);
+        task.setListener(new ExportDBTask.Listener()
+        {
+            @Override
+            public void onExportDBFinished(String filename)
+            {
+                assertThat(filename, is(not(nullValue())));
+
+                File f = new File(filename);
+                assertTrue(f.exists());
+                assertTrue(f.canRead());
+                latch.countDown();
+            }
+        });
+
+        task.execute();
+        latch.await(30, TimeUnit.SECONDS);
+    }
+}

app/src/androidTest/java/org/isoron/uhabits/unit/tasks/ImportDataTaskTest.java

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2016 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.unit.tasks;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+import android.test.suitebuilder.annotation.SmallTest;
+import android.widget.ProgressBar;
+
+import org.isoron.uhabits.helpers.DatabaseHelper;
+import org.isoron.uhabits.tasks.ImportDataTask;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.fail;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class ImportDataTaskTest
+{
+    private Context context;
+    private File baseDir;
+
+    @Before
+    public void setup()
+    {
+        context = InstrumentationRegistry.getContext();
+
+        baseDir = DatabaseHelper.getFilesDir("Backups");
+        if(baseDir == null) fail("baseDir should not be null");
+    }
+
+    private void copyAssetToFile(String assetPath, File dst) throws IOException
+    {
+        InputStream in = context.getAssets().open(assetPath);
+        DatabaseHelper.copy(in, dst);
+    }
+
+    private void assertTaskResult(final int expectedResult, String assetFilename)
+            throws IOException, InterruptedException
+    {
+        final CountDownLatch latch = new CountDownLatch(1);
+        ImportDataTask task = createTask(assetFilename);
+
+        task.setListener(new ImportDataTask.Listener()
+        {
+            @Override
+            public void onImportFinished(int result)
+            {
+                assertThat(result, equalTo(expectedResult));
+                latch.countDown();
+            }
+        });
+
+        task.execute();
+        latch.await(30, TimeUnit.SECONDS);
+    }
+
+    @NonNull
+    private ImportDataTask createTask(String assetFilename) throws IOException
+    {
+        ProgressBar bar = new ProgressBar(context);
+        File file = new File(String.format("%s/%s", baseDir.getPath(), assetFilename));
+        copyAssetToFile(assetFilename, file);
+
+        return new ImportDataTask(file, bar);
+    }
+
+    @Test
+    public void importInvalidData() throws Throwable
+    {
+        assertTaskResult(ImportDataTask.NOT_RECOGNIZED, "icon.png");
+    }
+
+    @Test
+    public void importValidData() throws Throwable
+    {
+        assertTaskResult(ImportDataTask.SUCCESS, "loop.db");
+    }
+}

app/src/main/java/org/isoron/uhabits/dialogs/FilePickerDialog.java

@@ -48,7 +48,7 @@ public class FilePickerDialog implements AdapterView.OnItemClickListener
         void onFileSelected(File file);
     }
 
-    private OnFileSelectedListener fileListener;
+    private OnFileSelectedListener listener;
 
     public FilePickerDialog(Activity activity, File initialDirectory)
     {
@@ -81,7 +81,7 @@ public class FilePickerDialog implements AdapterView.OnItemClickListener
         }
         else
         {
-            if (fileListener != null) fileListener.onFileSelected(file);
+            if (listener != null) listener.onFileSelected(file);
             dialog.dismiss();
         }
     }
@@ -91,9 +91,9 @@ public class FilePickerDialog implements AdapterView.OnItemClickListener
         dialog.show();
     }
 
-    public void setFileListener(OnFileSelectedListener fileListener)
+    public void setListener(OnFileSelectedListener listener)
     {
-        this.fileListener = fileListener;
+        this.listener = listener;
     }
 
     private void navigateTo(File path)

app/src/main/java/org/isoron/uhabits/fragments/ListHabitsFragment.java

@@ -26,6 +26,7 @@ import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.support.annotation.Nullable;
 import android.view.ActionMode;
 import android.view.ContextMenu;
 import android.view.ContextMenu.ContextMenuInfo;
@@ -73,7 +74,8 @@ import java.util.List;
 public class ListHabitsFragment extends Fragment
         implements OnSavedListener, OnItemClickListener, OnLongClickListener, DropListener,
         OnClickListener, HabitListLoader.Listener, AdapterView.OnItemLongClickListener,
-        HabitSelectionCallback.Listener, ImportDataTask.Listener
+        HabitSelectionCallback.Listener, ImportDataTask.Listener, ExportCSVTask.Listener,
+        ExportDBTask.Listener
 {
     long lastLongClick = 0;
     private boolean isShortToggleEnabled;
@@ -437,7 +439,7 @@ public class ListHabitsFragment extends Fragment
         if(dir == null) return;
 
         FilePickerDialog picker = new FilePickerDialog(activity, dir);
-        picker.setFileListener(new FilePickerDialog.OnFileSelectedListener()
+        picker.setListener(new FilePickerDialog.OnFileSelectedListener()
         {
             @Override
             public void onFileSelected(File file)
@@ -447,6 +449,7 @@ public class ListHabitsFragment extends Fragment
                 task.execute();
             }
         });
+
         picker.show();
     }
 
@@ -472,11 +475,49 @@ public class ListHabitsFragment extends Fragment
 
     public void exportAllHabits()
     {
-        new ExportCSVTask(activity, Habit.getAll(true), progressBar).execute();
+        ExportCSVTask task = new ExportCSVTask(Habit.getAll(true), progressBar);
+        task.setListener(this);
+        task.execute();
+    }
+
+    @Override
+    public void onExportCSVFinished(@Nullable String archiveFilename)
+    {
+        if(archiveFilename != null)
+        {
+            Intent intent = new Intent();
+            intent.setAction(Intent.ACTION_SEND);
+            intent.setType("application/zip");
+            intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(new File(archiveFilename)));
+            activity.startActivity(intent);
+        }
+        else
+        {
+            activity.showToast(R.string.could_not_export);
+        }
     }
 
     public void exportDB()
     {
-        new ExportDBTask(activity, progressBar).execute();
+        ExportDBTask task = new ExportDBTask(progressBar);
+        task.setListener(this);
+        task.execute();
+    }
+
+    @Override
+    public void onExportDBFinished(@Nullable String filename)
+    {
+        if(filename != null)
+        {
+            Intent intent = new Intent();
+            intent.setAction(Intent.ACTION_SEND);
+            intent.setType("application/octet-stream");
+            intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(new File(filename)));
+            activity.startActivity(intent);
+        }
+        else
+        {
+            activity.showToast(R.string.could_not_export);
+        }
     }
 }

app/src/main/java/org/isoron/uhabits/helpers/DatabaseHelper.java

@@ -124,8 +124,11 @@ public class DatabaseHelper
     }
 
     @Nullable
-    public static File getFilesDir(Context context, String prefix)
+    public static File getFilesDir(String prefix)
     {
+        Context context = HabitsApplication.getContext();
+        if(context == null) return null;
+
         File chosenDir = null;
         File externalFilesDirs[] = ContextCompat.getExternalFilesDirs(context, null);
         if(externalFilesDirs == null) return null;

app/src/main/java/org/isoron/uhabits/tasks/ExportCSVTask.java

@@ -19,14 +19,11 @@
 
 package org.isoron.uhabits.tasks;
 
-import android.content.Intent;
-import android.net.Uri;
 import android.os.AsyncTask;
+import android.support.annotation.Nullable;
 import android.view.View;
 import android.widget.ProgressBar;
 
-import org.isoron.uhabits.R;
-import org.isoron.uhabits.ReplayableActivity;
 import org.isoron.uhabits.helpers.DatabaseHelper;
 import org.isoron.uhabits.io.HabitsCSVExporter;
 import org.isoron.uhabits.models.Habit;
@@ -37,17 +34,25 @@ import java.util.List;
 
 public class ExportCSVTask extends AsyncTask<Void, Void, Void>
 {
-    private final ReplayableActivity activity;
+    public interface Listener
+    {
+        void onExportCSVFinished(@Nullable String archiveFilename);
+    }
+
     private ProgressBar progressBar;
     private final List<Habit> selectedHabits;
-    String archiveFilename;
+    private String archiveFilename;
+    private ExportCSVTask.Listener listener;
 
-    public ExportCSVTask(ReplayableActivity activity, List<Habit> selectedHabits,
-                         ProgressBar progressBar)
+    public ExportCSVTask(List<Habit> selectedHabits, ProgressBar progressBar)
     {
         this.selectedHabits = selectedHabits;
         this.progressBar = progressBar;
-        this.activity = activity;
+    }
+
+    public void setListener(Listener listener)
+    {
+        this.listener = listener;
     }
 
     @Override
@@ -63,19 +68,8 @@ public class ExportCSVTask extends AsyncTask<Void, Void, Void>
     @Override
     protected void onPostExecute(Void aVoid)
     {
-        if(archiveFilename != null)
-        {
-            Intent intent = new Intent();
-            intent.setAction(Intent.ACTION_SEND);
-            intent.setType("application/zip");
-            intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(new File(archiveFilename)));
-
-            activity.startActivity(intent);
-        }
-        else
-        {
-            activity.showToast(R.string.could_not_export);
-        }
+        if(listener != null)
+            listener.onExportCSVFinished(archiveFilename);
 
         if(progressBar != null)
             progressBar.setVisibility(View.GONE);
@@ -86,7 +80,7 @@ public class ExportCSVTask extends AsyncTask<Void, Void, Void>
     {
         try
         {
-            File dir = DatabaseHelper.getFilesDir(activity, "CSV");
+            File dir = DatabaseHelper.getFilesDir("CSV");
             if(dir == null) return null;
 
             HabitsCSVExporter exporter = new HabitsCSVExporter(selectedHabits, dir);

app/src/main/java/org/isoron/uhabits/tasks/ExportDBTask.java

@@ -19,14 +19,11 @@
 
 package org.isoron.uhabits.tasks;
 
-import android.content.Intent;
-import android.net.Uri;
 import android.os.AsyncTask;
+import android.support.annotation.Nullable;
 import android.view.View;
 import android.widget.ProgressBar;
 
-import org.isoron.uhabits.R;
-import org.isoron.uhabits.ReplayableActivity;
 import org.isoron.uhabits.helpers.DatabaseHelper;
 
 import java.io.File;
@@ -34,14 +31,23 @@ import java.io.IOException;
 
 public class ExportDBTask extends AsyncTask<Void, Void, Void>
 {
-    private final ReplayableActivity activity;
+    public interface Listener
+    {
+        void onExportDBFinished(@Nullable String filename);
+    }
+
     private ProgressBar progressBar;
     private String filename;
+    private Listener listener;
 
-    public ExportDBTask(ReplayableActivity activity, ProgressBar progressBar)
+    public ExportDBTask(ProgressBar progressBar)
     {
         this.progressBar = progressBar;
-        this.activity = activity;
+    }
+
+    public void setListener(Listener listener)
+    {
+        this.listener = listener;
     }
 
     @Override
@@ -57,19 +63,8 @@ public class ExportDBTask extends AsyncTask<Void, Void, Void>
     @Override
     protected void onPostExecute(Void aVoid)
     {
-        if(filename != null)
-        {
-            Intent intent = new Intent();
-            intent.setAction(Intent.ACTION_SEND);
-            intent.setType("application/octet-stream");
-            intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(new File(filename)));
-
-            activity.startActivity(intent);
-        }
-        else
-        {
-            activity.showToast(R.string.could_not_export);
-        }
+        if(listener != null)
+            listener.onExportDBFinished(filename);
         
         if(progressBar != null)
             progressBar.setVisibility(View.GONE);
@@ -82,7 +77,7 @@ public class ExportDBTask extends AsyncTask<Void, Void, Void>
 
         try
         {
-            File dir = DatabaseHelper.getFilesDir(activity, "Backups");
+            File dir = DatabaseHelper.getFilesDir("Backups");
             if(dir == null) return null;
 
             filename = DatabaseHelper.saveDatabaseCopy(dir);

app/src/main/res/values/strings.xml

@@ -139,13 +139,13 @@
     <string name="custom_frequency">Custom …</string>
     <string name="help">Help &amp; FAQ</string>
     <string name="could_not_export">Failed to export data.</string>
-    <string name="could_not_import">Failed to import habits from file.</string>
-    <string name="file_not_recognized">File type not recognized.</string>
+    <string name="could_not_import">Failed to import data.</string>
+    <string name="file_not_recognized">File not recognized.</string>
     <string name="habits_imported">Habits imported successfully.</string>
-    <string name="import_data_summary">Supports full backups exported by this app, as well as files generated by Tickmate, HabitBull or Rewire. See FAQ for more information.</string>
-    <string name="import_data">Import data</string>
-    <string name="export_as_csv_summary">Generates files that can be opened by spreadsheet software such as Microsoft Excel or OpenOffice Calc, but cannot be imported back.</string>
-    <string name="export_full_backup">Export full backup</string>
-    <string name="export_full_backup_summary">Generates a file that contains all your data, and that can be imported back.</string>
     <string name="full_backup_success">Full backup successfully exported.</string>
+    <string name="import_data">Import data</string>
+    <string name="export_full_backup">Export full backup</string>
+    <string name="import_data_summary">Supports full backups exported by this app, as well as files generated by Tickmate, HabitBull or Rewire. See FAQ for more information.</string>
+    <string name="export_as_csv_summary">Generates files that can be opened by spreadsheet software such as Microsoft Excel or OpenOffice Calc. This file cannot be imported back.</string>
+    <string name="export_full_backup_summary">Generates a file that contains all your data. This file can be imported back.</string>
 </resources>