Use temporary database for tests

app/build.gradle

@@ -8,6 +8,10 @@ android {
         applicationId "org.isoron.uhabits"
         minSdkVersion 15
         targetSdkVersion 23
+
+        buildConfigField "Integer", "databaseVersion", "12"
+        buildConfigField "String", "databaseFilename", "\"uhabits.db\""
+
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
 
@@ -35,7 +39,6 @@ dependencies {
     androidTestCompile 'com.android.support:support-annotations:23.1.1'
     androidTestCompile 'com.android.support.test:runner:0.4.1'
     androidTestCompile 'com.android.support.test:rules:0.4.1'
-    androidTestCompile 'org.hamcrest:hamcrest-library:1.3'
     androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
     androidTestCompile 'com.android.support.test.espresso:espresso-intents:2.2.1'
 }

app/src/main/AndroidManifest.xml

@@ -35,19 +35,13 @@
         android:maxSdkVersion="18"/>
 
     <application
-        android:name="com.activeandroid.app.Application"
+        android:name="HabitsApplication"
         android:allowBackup="true"
         android:backupAgent=".HabitsBackupAgent"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/main_activity_title"
         android:theme="@style/AppBaseTheme">
 
-        <meta-data
-            android:name="AA_DB_NAME"
-            android:value="uhabits.db"/>
-        <meta-data
-            android:name="AA_DB_VERSION"
-            android:value="12"/>
         <meta-data
             android:name="com.google.android.backup.api_key"
             android:value="AEdPqrEAAAAI6aeWncbnMNo8E5GWeZ44dlc5cQ7tCROwFhOtiw"/>

app/src/main/java/org/isoron/uhabits/HabitsApplication.java

@@ -0,0 +1,78 @@
+/*
+ * 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;
+
+import android.app.Application;
+
+import com.activeandroid.ActiveAndroid;
+import com.activeandroid.Configuration;
+
+import java.io.File;
+
+public class HabitsApplication extends Application
+{
+    private boolean isTestMode()
+    {
+        try
+        {
+            getClassLoader().loadClass("org.isoron.uhabits.unit.models.HabitTest");
+            return true;
+        }
+        catch (final Exception e)
+        {
+            return false;
+        }
+    }
+
+    private void deleteDB(String databaseFilename)
+    {
+        File databaseFile = new File(String.format("%s/../databases/%s",
+                getApplicationContext().getFilesDir().getPath(), databaseFilename));
+
+        if(databaseFile.exists()) databaseFile.delete();
+    }
+
+    @Override
+    public void onCreate()
+    {
+        super.onCreate();
+        String databaseFilename = BuildConfig.databaseFilename;
+
+        if (isTestMode())
+        {
+            databaseFilename = "test.db";
+            deleteDB(databaseFilename);
+        }
+
+        Configuration dbConfig = new Configuration.Builder(this)
+                .setDatabaseName(databaseFilename)
+                .setDatabaseVersion(BuildConfig.databaseVersion)
+                .create();
+
+        ActiveAndroid.initialize(dbConfig);
+    }
+
+    @Override
+    public void onTerminate()
+    {
+        ActiveAndroid.dispose();
+        super.onTerminate();
+    }
+}