Added unit test for MainActivity.

app/src/androidTest/scala/com/nutomic/ensichat/activities/MainActivityTest.scala

@@ -0,0 +1,47 @@
+package com.nutomic.ensichat.activities
+
+import android.bluetooth.BluetoothAdapter
+import android.content._
+import android.content.pm.ActivityInfo
+import android.test.ActivityUnitTestCase
+import android.util.Log
+import junit.framework.Assert
+
+class MainActivityTest extends ActivityUnitTestCase[MainActivity](classOf[MainActivity]) {
+
+  var lastIntent: Intent = _
+
+  class ActivityContextWrapper(context: Context) extends ContextWrapper(context) {
+    override def startService(service: Intent): ComponentName = {
+      Log.d("MainActivityTest", "startService")
+      lastIntent = service
+      null
+    }
+
+    override def stopService(name: Intent): Boolean = {
+      lastIntent = name
+      true
+    }
+
+    override def bindService(service: Intent, conn: ServiceConnection, flags: Int): Boolean = false
+
+    override def unbindService(conn: ServiceConnection): Unit = null
+  }
+
+  override def setUp(): Unit = {
+    setActivityContext(new ActivityContextWrapper(getInstrumentation.getTargetContext))
+    startActivity(new Intent(), null, null)
+  }
+
+  def testRequestBluetoothDiscoverable(): Unit = {
+    val intent: Intent = getStartedActivityIntent
+    Assert.assertEquals(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE, intent.getAction)
+    Assert.assertEquals(0, intent.getIntExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, -1))
+  }
+
+  def testScreenRotate(): Unit = {
+    getActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE)
+    getActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT)
+  }
+
+}